4.6 Review

Recent advances of bifunctional electrocatalysts and electrolyzers for overall seawater splitting

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High-Performance Alkaline Seawater Electrolysis with Anomalous Chloride Promoted Oxygen Evolution Reaction

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Summary: This study demonstrates the beneficial effect of chloride ions (Cl-) on the activity and stability of a popular oxygen evolution reaction (OER) catalyst, nickel-iron layered double hydroxide (NiFe LDH), in natural seawater. The adsorption of Cl- on the desired Fe sites suppresses Fe leaching and creates more OER-active Ni sites, improving the catalyst's long-term stability and activity simultaneously.

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Ferrum-molybdenum dual incorporated cobalt oxides as efficient bifunctional anti-corrosion electrocatalyst for seawater splitting

Wenxian Liu et al.

Summary: A monolithic Fe-Mo-Co-O nanosheet assembly, which comprises of Fe-doped Co2Mo3O8/MoO3/Co3O4 hybridized nanosheets decorated on nickel foam (FMCO/NF), has been developed for efficient and corrosion-resistant seawater splitting. This catalyst shows high activity and durability for water splitting in both freshwater and seawater media, outperforming benchmark catalysts and non-noble metal-based catalysts. Furthermore, it can be used as both cathode and anode in an alkaline seawater electrolyzer, demonstrating low cell voltage, good durability, and high Faradaic efficiency.

APPLIED CATALYSIS B-ENVIRONMENTAL (2023)

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Tuning octahedron sites in MnFe2O4 spinel by boron doping for highly efficient seawater splitting

Meng Chen et al.

Summary: In this study, a boron (B) doped MnFe2O4 spinel-type electrocatalyst with heterostructure was synthesized for seawater electrolysis. It was found that the introduction of B species effectively optimized the electronic configuration of MnFe2O4 and improved the electron transfer ability, reducing the energy barrier and enhancing the reaction process. The catalyst showed low overpotential and high stability in real seawater environment, making it a promising candidate for seawater splitting.

APPLIED CATALYSIS B-ENVIRONMENTAL (2023)

Article Chemistry, Physical

F doping and P vacancy engineered FeCoP nanosheets for efficient and stable seawater electrolysis at large current density

Jiawei Zhu et al.

Summary: Due to the shortage of global freshwater resources, electrolysis of seawater has become a popular research topic. The presence of chloride ions in seawater hinders its electrolysis, making it essential to develop catalysts with high catalytic activity and stability against chloride corrosion. In this study, F doped FeP and CoP nanosheets with P vacancies were synthesized and displayed bifunctional activity for HER and OER in alkaline seawater. The assembled catalyst showed excellent performance in driving overall seawater splitting.

APPLIED CATALYSIS B-ENVIRONMENTAL (2023)

Article Multidisciplinary Sciences

A sodium-ion-conducted asymmetric electrolyzer to lower the operation voltage for direct seawater electrolysis

Hao Shi et al.

Summary: By designing a pH-asymmetric electrolyzer with a Na+ exchange membrane, the authors have achieved efficient and low-cost hydrogen production from direct seawater electrolysis. This electrolyzer can prevent chloride corrosion and calcium/magnesium precipitation, and utilize the chemical potentials between different electrolytes to reduce the required voltage.

NATURE COMMUNICATIONS (2023)

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Electrolyte Engineering Applying Concentrated Chloride Ions with Mixed Buffer Solutions for a Versatile High-Productivity Water-Splitting System

Hiroki Komiya et al.

Summary: Developing highly active electrocatalysts and conductive electrolytescan improve water-splitting efficiency in the presence of chloride ions. This study introduces a new electrolyte engineering approach using a Cl--containing borate/carbonate mixed buffer electrolyte, which enhances conductivity and achieves a competitive value compared to 30 wt % KOH. The optimized performances for HER and OER are achieved by tuning the concentration of cations and operating pH, resulting in a stable zero-gap cell with high faradaic efficiency for seawater splitting.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2023)

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Emerging materials and technologies for electrocatalytic seawater splitting

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Summary: This review systematically examines recent advances in electrocatalytic seawater splitting and evaluates the obstacles to optimizing water supply, materials, and devices for stable hydrogen production from seawater. The study demonstrates that robust materials and innovative technologies, especially selective catalysts and high-performance devices, are critical for efficient seawater electrolysis. Furthermore, the review outlines and discusses future directions that could advance the techno-economic feasibility of this emerging field, providing a roadmap toward the design and commercialization of materials that can enable efficient, cost-effective, and sustainable seawater electrolysis.

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Strategic comparison of membrane-assisted and membrane-less water electrolyzers and their potential application in direct seawater splitting (DSS)

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Summary: Electrocatalytic splitting of water using renewable energy is a promising method for storing green energy as hydrogen. Splitting seawater instead of freshwater can be a sustainable alternative, although it faces challenges due to the complex composition of seawater. The corrosion of catalysts and the presence of pollutants in seawater create difficulties in developing stable electro-catalysts. Recent efforts have been made to directly split seawater without the need for purification, utilizing membrane-assisted or membrane-less electrolyzers.

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Review Green & Sustainable Science & Technology

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Summary: By directly electrolyzing seawater using marine energy, green hydrogen can be produced without freshwater and fossil fuels. However, the complexity of seawater composition presents challenges for direct seawater electrolysis, including electrode corrosion and failure. This review analyzes the barriers and future directions for optimizing direct seawater splitting. It emphasizes the importance of selective catalysts, stable electrolyzer devices, and low-cost electrolyzers for improving the feasibility of direct seawater splitting.

ONE EARTH (2023)

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Designing electrocatalysts for seawater splitting: surface/interface engineering toward enhanced electrocatalytic performance

Bo Xu et al.

Summary: As an ideal large-scale energy conversion/storage technology, electrochemical hydrogen production has great potential as a means of smoothing out the volatility of renewable sources. Electrocatalytic seawater splitting utilizes abundant natural seawater to replace purified water; this has considerable economic and environmental benefits, and will greatly expand the applications scope of water splitting. However, complex compositions existing in natural seawater hinder efficient H-2 electrosynthesis, especially chlorides that corrode the catalysts. Advanced surface and interface engineering has been demonstrated to be critical for the construction of efficient and stable electrodes for seawater electrolysis.

GREEN CHEMISTRY (2023)

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Recent Advances in Self-Supported Transition-Metal-Based Electrocatalysts for Seawater Oxidation

Qian Wu et al.

Summary: Seawater electrolysis is a promising technology for green hydrogen production. However, traditional powder catalysts have limitations such as slow kinetics, competitive reactions, and corrosion. Self-supported nanoarray catalysts offer better performance with lower resistance, larger surface area, and improved stability. Strategies like constructing porous structures, forming Cl- barrier layer, and developing hydrophilic and hydrophobic surfaces can enhance the catalytic activity and stability of the catalyst.

ACTA PHYSICO-CHIMICA SINICA (2023)

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Engineering P-Fe2O3-CoP nanosheets for overall freshwater and seawater splitting

Zhijie Cui et al.

Summary: Tailoring the surface composition and coordinative environment of catalysts can influence their chemical performance. In this study, P-Fe2O3-CoP nanosheets were successfully constructed using a gas-phase phosphorization process. The P doping induced the formation of interfacial and defective structures between Fe2O3 and CoP, resulting in high oxidation and electrolysis activity in alkaline conditions.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2023)

Article Chemistry, Physical

Au nanocluster coupling with Gd-Co2B nanoflakes embedded in reduced TiO2 nanosheets: Seawater electrolysis at low cell voltage with high selectivity and corrosion resistance

Tanveer ul Haq et al.

Summary: A novel seawater electrolysis electrode design has been proposed, which demonstrates outstanding performance in overall seawater splitting with high selectivity for oxygen and hydrogen, strong corrosion resistance, and practical viability.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Chemistry, Physical

Pristine and cobalt doped copper sulfide microsphere particles for seawater splitting

T. Marimuthu et al.

Summary: In this study, CuS microspheres were successfully synthesized with different synthesis times and Co doping concentrations. The Co doping significantly affected the morphology and electrochemical performance of CuS microspheres, with 5% Co-doped CuS demonstrating enhanced double layer capacitance and charge transfer properties.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Review Chemistry, Multidisciplinary

Electrocatalytic Water Splitting: From Harsh and Mild Conditions to Natural Seawater

Xue Xiao et al.

Summary: Electrocatalytic water splitting is considered the most effective way to generate green energy-hydrogen and is seen as a promising solution to the world's energy crisis and climate change. While research has achieved high catalytic activities in harsh conditions, practical applications face challenges such as corrosion, catalyst stability, and technical difficulties. As a result, there is increasing focus on studying water splitting in mild conditions or even natural seawater to overcome these obstacles.

SMALL (2022)

Article Nanoscience & Nanotechnology

Nickel-Cobalt Hydrogen Phosphate on Nickel Nitride Supported on Nickel Foam for Alkaline Seawater Electrolysis

Heng Sun et al.

Summary: The development of high-performance non-noble bifunctional catalysts for seawater electrolysis is challenging. In this study, a sandwich-like catalyst NiCoHPi@Ni3N/NF with a hierarchical structure is reported, demonstrating good oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) activity in alkaline simulated seawater electrolyte.

ACS APPLIED MATERIALS & INTERFACES (2022)

Article Chemistry, Applied

S doped Cu2O-CuO nanoneedles array: Free standing oxygen evolution electrode with high efficiency and corrosion resistance for seawater splitting

Tanveer ul Haq et al.

Summary: Electrochemical splitting of seawater is preferable for sustainable hydrogen production, and the amorphous sulfur substituted copper oxide nanoneedle anode demonstrates excellent catalytic performance and corrosion resistance, making it suitable for seawater electrolysis.

CATALYSIS TODAY (2022)

Article Chemistry, Physical

Breaking the scaling relations of oxygen evolution reaction on amorphous NiFeP nanostructures with enhanced activity for overall seawater splitting

Jianyun Liu et al.

Summary: By controlling the morphology of amorphous nickel-iron phosphides, we have successfully reduced the adsorption energy gap of key intermediates in the redox reactions, resulting in low overpotential electrocatalytic performance in simulated alkaline seawater.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Chemistry, Physical

Cost effective and facile low temperature hydrothermal fabrication of Cu2S thin films for hydrogen evolution reaction in seawater splitting

T. Marimuthu et al.

Summary: Electrolysis of seawater for hydrogen production is an attractive approach for renewable energy technologies. In this study, Cu2S electrocatalyst was fabricated on Ni foam using a low temperature hydrothermal growth method. The Cu2S catalyst grown for 1 hour exhibited low overpotentials and superior electrocatalytic behavior for hydrogen evolution reaction in both deionized water and seawater. The results suggest that the cost-effective and low temperature fabrication of Cu2S electrocatalyst holds great potential for large-scale seawater splitting.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Article Chemistry, Physical

Electrodeposition of NiFe-layered double hydroxide layer on sulfur-modified nickel molybdate nanorods for highly efficient seawater splitting

Haiyan Wang et al.

Summary: This study develops an efficient and abundant electrocatalyst for electrochemical seawater-splitting, which exhibits outstanding bifunctional catalytic activity in alkaline seawater and natural seawater electrolytes, making it a promising candidate for realistic seawater electrolysis.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

Article Chemistry, Physical

Self-assembled Pt-CoFe layered double hydroxides for efficient alkaline water/seawater splitting by spontaneous redox synthesis

Jin Wu et al.

Summary: This study presents a novel and simple synthesis strategy to prepare a self-supported high-performance water/seawater splitting bifunctional electro-catalyst. The catalyst exhibits excellent catalytic activity and enhanced chemical stability, which is highly relevant for commercial applications.

JOURNAL OF POWER SOURCES (2022)

Article Chemistry, Multidisciplinary

Monolayer NiIr-Layered Double Hydroxide as a Long-Lived Efficient Oxygen Evolution Catalyst for Seawater Splitting

Hanhui You et al.

Summary: The researchers introduced a 5d transition metal, iridium (Ir), and developed a monolayer NiIr-layered double hydroxide (LDH) catalyst to enhance the performance of oxygen evolution reaction (OER) for seawater splitting. The catalyst showed superior activity compared to commercial iridium dioxide (IrO2) and the best known OER catalyst NiFe-LDH in alkaline seawater.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Article Chemistry, Multidisciplinary

A Self-Reconstructed Bifunctional Electrocatalyst of Pseudo-Amorphous Nickel Carbide @ Iron Oxide Network for Seawater Splitting

Hao Zhang et al.

Summary: A NiFe-PBA-gel-cal composite material with a 2D network structure prepared by a sol-gel method exhibits high activity and stability as both anode and cathode catalyst for overall water splitting. Spectroscopy analysis and theoretical calculations reveal the in situ generation of NiOOH2-x active species from NiCx during water oxidation and the role of high valence states of Ni in oxygen evolution reaction.

ADVANCED SCIENCE (2022)

Article Nanoscience & Nanotechnology

Mo-decorated cobalt phosphide nanoarrays as bifunctional electrocatalysts for efficient overall water/seawater splitting

Y. Yu et al.

Summary: Mo-CoPX/NF nanosheet arrays prepared by an in situ hydrothermal-phosphorylation method show low overpotential in water/seawater electrolytes, effectively driving overall water splitting, and demonstrate excellent catalytic durability.

MATERIALS TODAY NANO (2022)

Article Chemistry, Inorganic & Nuclear

CoSe2 nanocrystals embedded into carbon framework as efficient bifunctional catalyst for alkaline seawater splitting br

Honghui Chen et al.

Summary: In this study, CoSe2 nanocrystals embedded into a carbon framework grown on carbon cloth were successfully designed, demonstrating excellent performance in seawater splitting and promising applications in sustainable hydrogen production.

INORGANIC CHEMISTRY COMMUNICATIONS (2022)

Article Biochemistry & Molecular Biology

Amorphous Co-Mo-B Film: A High-Active Electrocatalyst for Hydrogen Generation in Alkaline Seawater

Xiaodong Fang et al.

Summary: In this study, an amorphous Co-Mo-B film on Ni foam was developed with superior activity and stability for hydrogen production in alkaline seawater.

MOLECULES (2022)

Article Multidisciplinary Sciences

A membrane-based seawater electrolyser for hydrogen generation

Heping Xie et al.

Summary: This article introduces a method for direct seawater electrolysis for hydrogen production, which can solve the problems of side reactions and corrosion. In the experiment, this method stably operated for over 3200 hours under practical application conditions. The method is efficient, size-flexible, scalable, and has high practical value without increasing the operation cost.

NATURE (2022)

Article Chemistry, Multidisciplinary

Fe-Incorporated Ni/MoO2 Hollow Heterostructure Nanorod Arrays for High-Efficiency Overall Water Splitting in Alkaline and Seawater Media

Wenjie Shi et al.

Summary: By employing a self-sacrificing template strategy and regulating the composition and structure simultaneously, Fe-incorporated Ni/MoO2 heterostructural (NiFe/Fe-MoO2) hollow nanorod arrays are designed and constructed, showing superior activity in oxygen and hydrogen evolution reactions. This catalyst exhibits high performance in alkaline water and seawater electrolysis, surpassing Pt/C and RuO2.

SMALL (2022)

Article Chemistry, Applied

Synergistically enhanced activity and stability of bifunctional nickel phosphide/sulfide heterointerface electrodes for direct alkaline seawater electrolysis

Hao-Yu Wang et al.

Summary: In this study, a seawater electrolysis catalyst with high activity and stability was developed for efficient hydrogen and oxygen production. It showed impressive electrocatalytic performance and long-term stability in both seawater and saline water.

JOURNAL OF ENERGY CHEMISTRY (2022)

Article Materials Science, Multidisciplinary

Electron enriched ternary NiMoB electrocatalyst for improved overall water splitting: Better performance as compared to the Pt/C ∥ RuO2 at high current density

Rutuja Mandavkar et al.

Summary: The ternary nickel-molybdenum-boron (NiMoB) electrocatalyst was systematically studied and a highly optimized NiMoB electrode with multi-sphere morphology showed superior electrochemical water splitting performance compared to benchmark electrodes. The incorporation of boron significantly improved the stability and water splitting capability of the electrodes.

APPLIED MATERIALS TODAY (2022)

Article Nanoscience & Nanotechnology

Structural and Electronic Modulation of Iron-Based Bimetallic Metal-Organic Framework Bifunctional Electrocatalysts for Efficient Overall Water Splitting in Alkaline and Seawater Environment

Yun Luo et al.

Summary: In this paper, a strategy to modulate the electronic microstructure of iron-based bimetallic MOFs for efficient water splitting is proposed. The optimal bimetallic MOFs demonstrated excellent electrocatalytic performance for oxygen and hydrogen evolution reactions. These findings highlight the importance of tailoring the electronic microstructure of bimetallic MOFs for efficient overall water splitting in alkaline and seawater environments.

ACS APPLIED MATERIALS & INTERFACES (2022)

Article Nanoscience & Nanotechnology

Cobalt Molybdenum Nitride-Based Nanosheets for Seawater Splitting

Xiang Wang et al.

Summary: This article reports a simple approach for preparing nitride composite materials using a metal-organic framework sacrificial template, and demonstrates the excellent catalytic performance and corrosion resistance of these composite materials in seawater splitting. By supporting cobalt molybdenum nitride catalyst on nitrogen-doped carbon nanosheets, high current density can be achieved at low overpotentials, providing potential for cost-effective implementation of water electrolysis technology.

ACS APPLIED MATERIALS & INTERFACES (2022)

Review Chemistry, Multidisciplinary

Progress in Hydrogen Production Coupled with Electrochemical Oxidation of Small Molecules

Tongzhou Wang et al.

Summary: The electrochemical oxidation of small molecules for hydrogen production and pollutant degradation has great advantages and potential applications.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

Article Chemistry, Physical

Recent advances in non-noble metal-based bifunctional electrocatalysts for overall seawater splitting

Hao Zhang et al.

Summary: Seawater electrolysis is an attractive method for clean energy/hydrogen production due to the abundance of seawater. However, the scarcity of precious metals and inadequate materials pose challenges in obtaining bifunctional electrocatalysts with high catalytic activity and durability. This review introduces the mechanism and challenges of seawater electrolysis and summarizes optimization strategies for non-noble-metal-based electrocatalysts to provide guidance for the commercialization of seawater electrolysis.

JOURNAL OF ALLOYS AND COMPOUNDS (2022)

Article Chemistry, Physical

N, O-doped carbon foam as metal-free electrocatalyst for efficient hydrogen production from seawater

Qian Liu et al.

Summary: Seawater electrolysis is a promising technology for large-scale hydrogen production, but electrode poisoning and corrosion limit its development. This study proposes a commercial melamine foam-derived N, O-doped carbon foam as a high-active metal-free electrocatalyst for seawater splitting, showing excellent stability and performance.

NANO RESEARCH (2022)

Article Multidisciplinary Sciences

Pivotal role of reversible NiO6 geometric conversion in oxygen evolution

Xiaopeng Wang et al.

Summary: By modifying the electronic states around the Fermi level, an efficient electron transfer process in the oxygen evolution reaction can be achieved. The proposed mechanism involves a switchable metal and oxygen redox chemistry in nickel-oxyhydroxide-based materials with light as the trigger.

NATURE (2022)

Article Multidisciplinary Sciences

Controlled growth of a high selectivity interface for seawater electrolysis

Yang Gao et al.

Summary: Seawater electrolysis is an important direction for the development of hydrogen energy conversion, and achieving high selectivity, activity, and stability in seawater electrolysis reactions is the key challenge. In this report, the construction of heterostructures GDY/RhOx/GDY demonstrated high-performance overall seawater electrolysis.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2022)

Article Chemistry, Multidisciplinary

Mild Construction of Midas Touch Metal-Organic Framework-Based Catalytic Electrodes for Highly Efficient Overall Seawater Splitting

Jinli Fan et al.

Summary: The study presents a mild construction method for highly efficient and durable electrodes for overall water splitting. The self-supporting electrode, prepared by growing metal-organic framework on carbon cloth and plating with cobalt-boron, exhibits excellent performance in hydrogen and oxygen evolution reactions. It also shows long-term stability in various electrolytes.

SMALL (2022)

Article Chemistry, Applied

Controllable synthesis of a self-assembled ultralow Ru, Ni-doped Fe2O3 lily as a bifunctional electrocatalyst for large-current-density alkaline seawater electrolysis

Tong Cui et al.

Summary: In this study, a self-assembled lily-shaped RuNi-Fe2O3 catalyst was synthesized via a facile hydrothermal process, and it was successfully used for alkaline seawater electrolysis. The catalyst demonstrated high efficiency, stability, and long-term durability, enabling large current density water splitting at low voltages.

CHINESE JOURNAL OF CATALYSIS (2022)

Review Materials Science, Multidisciplinary

Development Strategies in Transition Metal Borides for Electrochemical Water Splitting

Yihang Yao et al.

Summary: This article summarizes the excellent performance and optimization strategies of transition metal borides (TMBs) in hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), pointing out the direction for enhancing the performance.

ENERGY & ENVIRONMENTAL MATERIALS (2022)

Article Chemistry, Applied

S doped Cu2O-CuO nanoneedles array: Free standing oxygen evolution electrode with high efficiency and corrosion resistance for seawater splitting

Tanveer ul Haq et al.

Summary: Electrochemical splitting of seawater is a preferable method for sustainable hydrogen production, and a robust and cost-effective anode material with excellent catalytic activity is crucial. The S-Cu2O-CuO nanoneedles demonstrated outstanding oxygen evolution reaction (OER) performance due to its high conductivity, active sites, intrinsic activity, and corrosion resistance, making it a prospective candidate for largescale alkaline seawater electrolysis.

CATALYSIS TODAY (2022)

Article Chemistry, Multidisciplinary

Heterogeneous Bimetallic Phosphide Ni2P-Fe2P as an Efficient Bifunctional Catalyst for Water/Seawater Splitting

Libo Wu et al.

Summary: The study successfully synthesized a heterogeneous Ni2P-Fe2P microsheet electrocatalyst with superior catalytic activity and corrosion resistance, suitable for water and seawater electrolysis, demonstrating great potential. The catalyst has abundant active sites and a superior transfer coefficient, exhibiting performance even better than the currently reported best bifunctional catalysts.

ADVANCED FUNCTIONAL MATERIALS (2021)

Article Chemistry, Physical

Synthesis of 3D heterostructure Co-doped Fe2P electrocatalyst for overall seawater electrolysis

Shaohua Wang et al.

Summary: The study presents a novel three-dimensional metal phosphide electrocatalyst (Co-Fe2P) deposited on Ni foam for seawater electrolysis, showing enhanced electrocatalytic properties for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Density functional theory calculations demonstrated the beneficial effect of CoFe2P on HER due to its suitable H* adsorption, with the potential for application in efficient electrolysis of seawater.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Chemistry, Physical

Rational design of core-shell-structured CoPx@FeOOH for efficient seawater electrolysis

Libo Wu et al.

Summary: The core-shell-structured CoPx@FeOOH catalyst designed for seawater electrolysis for hydrogen generation demonstrates excellent catalytic activity, high conductivity, large surface area, improved turnover frequency, optimal absorption energy to OER intermediates, enhanced chemical stability, and corrosion resistance. The CoPx||CoPx@FeOOH pair also shows great promise for fuel-gas production from seawater, with high Faradaic efficiency and low overpotentials required for certain current densities.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Energy & Fuels

Efficiency and stability of hydrogen production from seawater using solid oxide electrolysis cells

Zhao Liu et al.

Summary: This study successfully demonstrated the use of solid oxide electrolysis for splitting untreated seawater, showing excellent electrochemical performance and long-term stability. A high energy conversion efficiency was achieved even without reusing high temperature exhaust gas. Long-term experiments showed that solid oxide electrolysis performed well in seawater splitting.

APPLIED ENERGY (2021)

Article Chemistry, Inorganic & Nuclear

NiFe Layered Double Hydroxide/FeOOH Heterostructure Nanosheets as an Efficient and Durable Bifunctional Electrocatalyst for Overall Seawater Splitting

Kun Jiang et al.

Summary: In this study, an advanced bifunctional electrocatalyst based on NiFe layered double hydroxide (LDH)/FeOOH heterostructure nanosheets was successfully synthesized via a simple electrodeposition method. The electrode demonstrated excellent electrocatalytic activity and stability, providing a valid strategy for designing a non-noble metal catalyst for seawater splitting. This work highlights the potential of the NiFe LDH/FeOOH heterostructure in facilitating active NiOOH species formation and enhancing overall alkaline simulated seawater splitting efficiency.

INORGANIC CHEMISTRY (2021)

Article Chemistry, Analytical

Preparation of Ti@NiB electrode via electroless plating toward high-efficient alkaline simulated seawater splitting

Yiran Zhang et al.

Summary: The study presents a stable catalytic electrode design for efficient and stable hydrogen production in alkaline simulated seawater. By modifying active material NiB on Ti plate through electroless plating, a bifunctional Ti@NiB electrode is prepared. Experimental results demonstrate the electrode's good stability and high electrolysis efficiency.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY (2021)

Article Nanoscience & Nanotechnology

Hierarchical Nanostructured Co-Mo-B/CoMoO4-x Amorphous Composite for the Alkaline Hydrogen Evolution Reaction

Yanmei Ren et al.

Summary: Transition metal borides (TMBs) are a class of important electrocatalytic materials for water splitting, but the synthesis of complex nanostructured TMBs with tunable surface properties is a major obstacle. In this study, a hierarchical nanostructured Co-Mo-B/CoMoO4-x composite supported on cobalt foam was fabricated via a hydrothermal method, resulting in high activity and stability for the alkaline hydrogen evolution reaction (HER), outperforming most reported TMB electrocatalysts.

ACS APPLIED MATERIALS & INTERFACES (2021)

Editorial Material Chemistry, Multidisciplinary

The Significance of Properly Reporting Turnover Frequency in Electrocatalysis Research

Sengeni Anantharaj et al.

Summary: Turnover frequency (TOF) has long been used as an accurate indicator of the intrinsic activity of catalysts in electrocatalytic reactions, but is often not properly reported. While current density is significant in determining apparent activity, TOF can more accurately reflect intrinsic activity free from interfering phenomena, yet remains underused in electrocatalysis.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Physical

Wood aerogel-derived sandwich-like layered nanoelectrodes for alkaline overall seawater electrosplitting

Hongjiao Chen et al.

Summary: By designing an artificial sandwich-like catalyst, a highly efficient electrocatalyst with bifunctional oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) activities in alkaline seawater was successfully synthesized. The utilization of the 3D wood aerogel features significantly enhanced the efficiency of seawater electrolysis.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Chemistry, Multidisciplinary

Ultralow Ru Incorporated Amorphous Cobalt-Based Oxides for High-Current-Density Overall Water Splitting in Alkaline and Seawater Media

Dulan Wu et al.

Summary: This study introduces an ultralow Ru incorporated amorphous cobalt-based oxide catalyst for efficient and stable water electrolysis at high current densities, demonstrating its potential for industrial applications and exploring high-current-density water electrocatalysis by altering the catalyst crystallinity.

SMALL (2021)

Article Chemistry, Physical

Microfabrication of the Ammonia Plasma-Activated Nickel Nitride-Nickel Thin Film for Overall Water Splitting in the Microfluidic Membraneless Electrolyzer

Biswajit S. De et al.

Summary: The study demonstrates the synthesis, micropatterning, and performance of a nickel nitride bifunctional catalyst to enhance the microfluidic alkaline membraneless electrolyzer. By optimizing the electrolyte flow rate using microfabrication techniques, gas product separation is maximized. The mu AME operates in a two-electrode configuration with good current density and stable performance.

ACS APPLIED ENERGY MATERIALS (2021)

Review Chemistry, Physical

Recent Advances in 1D Electrospun Nanocatalysts for Electrochemical Water Splitting

Longcheng Zhang et al.

Summary: This review discusses recent progress in electrocatalytic water splitting using advanced electrospun nanomaterials, covering fundamentals, structure design, and electrocatalytic properties. The review highlights the importance of designing 1D nanocatalysts with large surface area, high electronic conductivity, and tunable composition to improve the efficiency of electrochemical water splitting. The future perspectives and challenges in designing next-generation 1D electrospun nanocatalysts for electrochemical water splitting are also outlined.

SMALL STRUCTURES (2021)

Article Chemistry, Physical

Ultralow Ru-assisted and vanadium-doped flower-like CoP/Ni2P heterostructure for efficient water splitting in alkali and seawater

Qianli Ma et al.

Summary: This study successfully synthesized a low-cost, high-performance bifunctional catalyst that effectively drives hydrogen and oxygen production reactions in electrochemical water electrolysis through a specific heterostructure, achieving excellent catalytic performance.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

Article Chemistry, Multidisciplinary

Metastable Two-Dimensional Materials for Electrocatalytic Energy Conversions

Huanyu Jin et al.

Summary: Two-dimensional materials have emerged as promising electrocatalysts due to their unique physical and chemical properties. Metastable phases of 2D materials, which are highly active for electrocatalytic processes, can be obtained by destabilizing thermodynamically stable phases. Considerations for designing high-performance metastable 2D electrocatalysts include synthesis economy, product yield, post-treatment applicability, general synthesis protocols, and chemical and catalytic stabilities.

ACCOUNTS OF MATERIALS RESEARCH (2021)

Review Chemistry, Multidisciplinary

Advances in hydrogen production from electrocatalytic seawater splitting

Cheng Wang et al.

Summary: Seawater is a promising electrolyte for industrial hydrogen production and refining of edible salt. Efficient and stable electrocatalysts are essential for water electrolysis, leading to significant achievements in recent years.

NANOSCALE (2021)

Review Chemistry, Physical

Seawater electrocatalysis: activity and selectivity

Sakila Khatun et al.

Summary: Seawater is considered a major hydrogen reservoir, but the presence of multielements and interference in electrochemistry, particularly chlorine chemistry, make electrocatalytic water splitting challenging. To achieve sustainable seawater electrolysis, focus should not only on electrocatalyst activity but also on selective oxygen evolution reaction to suppress corrosive chlorine chemistry.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

Review Chemistry, Physical

Seawater electrocatalysis: activity and selectivity

Sakila Khatun et al.

Summary: Seawater is considered a major hydrogen reservoir, but the presence of multiple elements and interference in electrochemistry, especially chlorine chemistry, make seawater electrolysis challenging. To make seawater electrolysis sustainable, efficient oxygen evolution reaction and suppression of corrosive chlorine chemistry by electrocatalysts are highly desirable.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

Article Chemistry, Multidisciplinary

Self-Supported Transition-Metal-Based Electrocatalysts for Hydrogen and Oxygen Evolution

Hongming Sun et al.

ADVANCED MATERIALS (2020)

Article Chemistry, Physical

Process design for green hydrogen production

Lorena Mosca et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2020)

Review Chemistry, Physical

Membrane Electrolyzers for Impure-Water Splitting

Grace A. Lindquist et al.

JOULE (2020)

Article Chemistry, Physical

Stable complete seawater electrolysis by using interfacial chloride ion blocking layer on catalyst surface

Amol R. Jadhav et al.

JOURNAL OF MATERIALS CHEMISTRY A (2020)

Article Chemistry, Multidisciplinary

Efficient direct seawater electrolysers using selective alkaline NiFe-LDH as OER catalyst in asymmetric electrolyte feeds

Soeren Dresp et al.

ENERGY & ENVIRONMENTAL SCIENCE (2020)

Article Chemistry, Physical

Direct Electrolytic Splitting of Seawater: Opportunities and Challenges

Soeren Dresp et al.

ACS ENERGY LETTERS (2019)

Editorial Material Chemistry, Physical

Do the Evaluation Parameters Reflect Intrinsic Activity of Electrocatalysts in Electrochemical Water Splitting?

Sengeni Anantharaj et al.

ACS ENERGY LETTERS (2019)

Article Green & Sustainable Science & Technology

Environmental sustainability of renewable hydrogen in comparison with conventional cooking fuels

Ximena C. Schmidt Rivera et al.

JOURNAL OF CLEANER PRODUCTION (2018)

Review Green & Sustainable Science & Technology

Current status of water electrolysis for energy storage, grid balancing and sector coupling via power-to-gas and power-to-liquids: A review

Alexander Buttler et al.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2018)

Review Chemistry, Multidisciplinary

Heterostructures for Electrochemical Hydrogen Evolution Reaction: A Review

Guoqiang Zhao et al.

ADVANCED FUNCTIONAL MATERIALS (2018)

Article Chemistry, Physical

Process modelling of an alkaline water electrolyzer

Philipp Haug et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2017)

Review Chemistry, Multidisciplinary

Electrocatalysis for the oxygen evolution reaction: recent development and future perspectives

Nian-Tzu Suen et al.

CHEMICAL SOCIETY REVIEWS (2017)

Article Chemistry, Multidisciplinary

Controlling Selectivity in the Chlorine Evolution Reaction over RuO2-Based Catalysts

Kai S. Exner et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2014)

Review Chemistry, Multidisciplinary

Nanostructured hydrotreating catalysts for electrochemical hydrogen evolution

Carlos G. Morales-Guio et al.

CHEMICAL SOCIETY REVIEWS (2014)

Review Chemistry, Physical

A comprehensive review on PEM water electrolysis

Marcelo Carmo et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2013)

Article Chemistry, Physical

Integrated microfluidic test-bed for energy conversion devices

Miguel A. Modestino et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2013)

Article Multidisciplinary Sciences

High-Performance Silicon Photoanodes Passivated with Ultrathin Nickel Films for Water Oxidation

Michael J. Kenney et al.

SCIENCE (2013)

Article Chemistry, Physical

Universality in Oxygen Evolution Electrocatalysis on Oxide Surfaces

Isabela C. Man et al.

CHEMCATCHEM (2011)

Article Electrochemistry

The effective surface pH during reactions at the solid-liquid interface

Ioannis Katsounaros et al.

ELECTROCHEMISTRY COMMUNICATIONS (2011)

Review Multidisciplinary Sciences

The Future of Seawater Desalination: Energy, Technology, and the Environment

Menachem Elimelech et al.

SCIENCE (2011)

Review Chemistry, Multidisciplinary

Solar Energy Supply and Storage for the Legacy and Non legacy Worlds

Timothy R. Cook et al.

CHEMICAL REVIEWS (2010)

Review Chemistry, Multidisciplinary

Carbon dioxide and formic acid-the couple for environmental-friendly hydrogen storage?

Stephan Enthaler et al.

ENERGY & ENVIRONMENTAL SCIENCE (2010)

Review Chemistry, Applied

An overview of hydrogen production technologies

J. D. Holladay et al.

CATALYSIS TODAY (2009)