4.7 Article

Cu2S@NiFe layered double hydroxides nanosheets hollow nanorod arrays self-supported oxygen evolution reaction electrode for efficient anion exchange membrane water electrolyzer

Related references

Note: Only part of the references are listed.
Article Chemistry, Physical

CuxO nanorod arrays shelled with CoNi layered double hydroxide nanosheets for enhanced oxygen evolution reaction under alkaline conditions

Zhenyu Cai et al.

Summary: In this study, a unique nanocomposite of CuxO@CoNi-LDH with a hierarchical nanostructure was synthesized by a fast electrodeposition method. The resulting electrocatalyst showed high catalytic performance and long-term stability in the oxygen evolution reaction.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2023)

Article Chemistry, Physical

Peony flower-like CuxS@NiMn LDH heterostructure as an efficient electrocatalyst for the oxygen evolution reaction

Ge Gao et al.

Summary: In this study, peony flower-like CuxS@NiMn LDH was deposited on nickel foam using the SILAR and hydrothermal method. The CuxS@NiMn LDH/NF electrode exhibited superior OER activity with low overpotential, Tafel slope, and high stability. This excellent performance was attributed to the porous structure and synergistic effect between NiMn LDH and CuxS.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2023)

Article Engineering, Environmental

Bifunctional oxovanadate doped cobalt carbonate for high-efficient overall water splitting in alkaline-anion-exchange-membrane water-electrolyzer

Abhishek Meena et al.

Summary: The self-supported oxovanadate-doped cobalt carbonate (VCoCOx@NF) on nickel foam (NF) is a high-performance catalyst for overall water splitting in alkaline-anionexchange-membrane-water-electrolyzer (AAEMWE). It shows excellent activity for both hydrogen and oxygen evolution reactions, reducing overpotentials and achieving overall water splitting at low cell voltages. The doping of V species enhances the HER and OER at the Co site, providing potential for large-scale hydrogen production utilizing V- and Co-based bimetallic oxide materials.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Engineering, Environmental

Interface-Enhanced Oxygen Vacancies of CoCuOx Catalysts In Situ Grown on Monolithic Cu Foam for VOC Catalytic Oxidation

Yanfei Zheng et al.

Summary: In this study, a vertically oriented Cu(OH)2 nanorod was in situ grown on copper foam (CF) to synthesize CoCu-MOF catalyst, which showed excellent performance in acetone oxidation. The optimized catalyst demonstrated satisfactory stability in long-term, cycle, water resistance, and high airspeed tests. This research provides a novel strategy for designing efficient monolithic catalysts for VOC oxidation and other environmental applications.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Article Chemistry, Physical

High-performance and durable water electrolysis using a highly conductive and stable anion-exchange membrane

Sun Young Kang et al.

Summary: The commercialization of anion-exchange membrane water electrolysis (AEMWE) is crucial for producing low-cost and high-purity hydrogen. In this study, a high-performance and stable AEMWE was developed by using an anion-exchange membrane without an aryl-ether backbone structure. The adapted AEM exhibited improved performance and better durability compared to the conventional AEM.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Article Chemistry, Physical

Fe/Ni bimetallic organic framework with varying anions as robust electrocatalyst for oxygen evolution reaction

Na Wang et al.

Summary: The effects of different anions on the performance of bimetallic FeNi-MOF were investigated in this study. It was found that the MOF prepared with chloride ion exhibited lower overpotential and higher electrochemical stability, which could be attributed to the lower charge transfer resistance, increased active area, and more active sites.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Article Chemistry, Physical

Electrochemical- and mechanical stability of catalyst layers in anion exchange membrane water electrolysis

Britta Mayerhoefer et al.

Summary: This study focuses on key issues in anion exchange membrane water electrolysis, including the selection of anode catalysts and membrane and electrode binders, as well as strategies for improving stability and durability.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Article Chemistry, Multidisciplinary

Boosting Electrochemical Water Oxidation on NiFe (oxy) Hydroxides by Constructing Schottky Junction toward Water Electrolysis under Industrial Conditions

Xiaomei Wang et al.

Summary: By constructing a 3D free-standing NiFe(oxy)hydroxide-based electrode with Schottky junction, high current densities of up to 1000 mA cm(-2) with long-term stability in industrial conditions can be achieved, demonstrating great potential for practical applications.

SMALL (2022)

Article Chemistry, Multidisciplinary

Ultrafast Room-Temperature Synthesis of Self-Supported NiFe-Layered Double Hydroxide as Large-Current-Density Oxygen Evolution Electrocatalyst

Xiaoge Li et al.

Summary: This study presents a method for directly growing NiFe-layered double hydroxide (NiFe-LDH) nanosheets on nickel foam under ambient temperature and pressure, resulting in a highly porous array with numerous exposed active sites, reduced resistance of charge/mass transportation, and enhanced mechanical stability. The electrocatalyst exhibits excellent catalytic performance for oxygen evolution reaction (OER) in alkaline electrolyte, achieving high current densities with low overpotentials. This simple and cost-effective synthesis method has the potential to accelerate the commercialization of hydrogen production through water splitting.

SMALL (2022)

Review Chemistry, Multidisciplinary

Design and Synthesis of Hollow Nanostructures for Electrochemical Water Splitting

Min Yang et al.

Summary: This article summarizes recent progress in the structural design of micro/nanostructured hollow materials as advanced electrocatalysts for water splitting. Design principles and strategies for highly effective hollow electrocatalysts for oxygen/hydrogen evolution reactions are highlighted, and an overview of current reports about hollow electrocatalysts with diverse architectural designs and functionalities is given. The future research directions of hollow electrocatalysts for water splitting are also discussed based on personal perspectives.

ADVANCED SCIENCE (2022)

Article Nanoscience & Nanotechnology

Multistep Sulfur Leaching for the Development of a Highly Efficient and Stable NiSx/Ni(OH)2/NiOOH Electrocatalyst for Anion Exchange Membrane Water Electrolysis

Lu Xia et al.

Summary: A Ni-rich NiSx/Ni(OH)(2)/NiOOH catalyst derived from NiS2/Ni3S4 nanocubes shows high catalytic activity and stability in alkaline water electrolysis. This finding is significant for the development of stable chalcogenide-based anodic electrocatalysts.

ACS APPLIED MATERIALS & INTERFACES (2022)

Article Chemistry, Multidisciplinary

Partial Sulfidation Strategy to NiFe-LDH@FeNi2S4 Heterostructure Enable High-Performance Water/Seawater Oxidation

Lei Tan et al.

Summary: The construction of Ni2Fe-LDH/FeNi2S4 heterostructure through partial sulfidation is reported, which exhibits abundant active sites, rapid charge and mass transfer, and favorable adsorption energy, leading to improved alkaline water oxidation. In addition, the post-formed sulfate passivating layer on Ni2Fe-LDH/FeNi2S4/NF contributes to enhanced OER activity and durability in alkaline simulated seawater electrolyte.

ADVANCED FUNCTIONAL MATERIALS (2022)

Article Chemistry, Multidisciplinary

Triggering Lattice Oxygen Activation of Single-Atomic Mo Sites Anchored on Ni-Fe Oxyhydroxides Nanoarrays for Electrochemical Water Oxidation

Yunzhen Wu et al.

Summary: This study demonstrates the tuning of the reactivity of lattice oxygen by anchoring single-atomic Mo sites on Ni-Fe oxyhydroxide nanoarrays, leading to a significant acceleration of the oxygen evolution reaction. Through experimental and theoretical investigations, it is confirmed that the introduction of single-atomic Mo sites enhances the oxidation state of the metal and the metal-oxygen hybridization, resulting in the formation of oxidized ligand holes above the Fermi level.

ADVANCED MATERIALS (2022)

Article Engineering, Environmental

Dual regulation both intrinsic activity and mass transport for self-supported electrodes using in anion exchange membrane water electrolysis

Lei Wan et al.

Summary: Anion exchange membrane water electrolysis (AEMWE) is a promising method for large-scale hydrogen production, but its performance is limited by catalyst reaction kinetics and mass transport. In this study, Fe0.2Ni0.8-P0.5S0.5 nanoisland arrays are reported as efficient bifunctional catalysts with ultralow overpotentials. The Fe0.2Ni0.8-P0.5S0.5 electrode exhibits superhydrophilicity and aerophobicity, facilitating the exposure of active sites and enhancing gas and electrolyte diffusion. AEMWE based on the Fe0.2Ni0.8-P0.5S0.5 electrodes demonstrates good stability and high efficiency.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Chemistry, Physical

In-situ construction of 3D hetero-structured sulfur-doped nanoflower- like FeNi LDH decorated with NiCo Prussian blue analogue cubes as efficient electrocatalysts for boosting oxygen evolution reaction

Lu Zhang et al.

Summary: It is currently urgent to develop non-noble metal-based catalysts with abundant reserves and high efficiency for the oxygen evolution reaction (OER) in water electrolysis devices. In this study, a cubic NiCo-Prussian blue analogue/flower-like FeNi layered double hydroxide heterostructure was successfully formed in-situ on porous nickel foam via a hydrothermal strategy coupled with subsequent sulfurizing treatment. The catalyst demonstrated superior OER activity and stability, providing a hopeful model for enhancing OER performance.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

Article Chemistry, Physical

Multiscale manipulating induced flexible heterogeneous V-NiFe2O4@Ni2P electrocatalyst for efficient and durable oxygen evolution reaction

Siran Xu et al.

Summary: This study proposes a versatile multiscale manipulating strategy to construct a V-NiFe2O4@Ni2P/NF heterostructure with superior activity and stability. The in-situ generated Ni2P phase induced by selective phosphorylation of the NiFe-precursor exhibits excellent catalytic activity. In addition, metal V doping stimulates the activity by modulating the electronic structure. The binder-free catalyst, built with a large active surface and robust scaffold, demonstrates outstanding OER activity and long-term stability.

NANO RESEARCH (2022)

Article Chemistry, Multidisciplinary

Metal-Organic Framework-Derived Hollow CoSx Nanoarray Coupled with NiFe Layered Double Hydroxides as Efficient Bifunctional Electrocatalyst for Overall Water Splitting

Yun Jae Lee et al.

Summary: In this study, a bifunctional electrocatalyst composed of hollow CoSx and Ni-Fe based layered double hydroxide (NiFe LDH) nanosheets was developed for efficient overall water splitting. The catalyst exhibits excellent HER and OER activities with low overpotentials and good durability.

SMALL (2022)

Article Chemistry, Physical

Deciphering the Dynamic Structure Evolution of Fe- and Ni-Codoped CoS2for Enhanced Water Oxidation

Wenfeng Peng et al.

Summary: This study reports the synthesis of homogeneous single-metal and bimetal doping sulfides with a pyrite structure for OER catalysts. Operando studies reveal that the incorporation of Fe and Ni accelerates the dynamic response of surface self-reconstruction and promotes the oxidation of Co and Fe, while suppressing the oxidation of Ni, resulting in optimized activity and stability.

ACS CATALYSIS (2022)

Article Energy & Fuels

Self-Supporting NiFe Layered Double Hydroxide Nanoflower Cluster Anode Electrode for an Efficient Alkaline Anion Exchange Membrane Water Electrolyzer

Dandan Guo et al.

Summary: In this study, a self-supporting NiFe LDHs nanoflower cluster OER electrode was synthesized by a one-step impregnation method, showing excellent activity and stability in a three-electrode system and as the anode of AEMWE. The electrode exhibited special morphological structure that facilitated active site exposure and mass transfer under high current density. The experimental results demonstrate the electrode's advantages of good activity and low cost, making it promising for industrial application.

ENERGIES (2022)

Article Chemistry, Physical

Facile synthesis of the encapsulation of Co-based multimetallic alloys/oxide nanoparticles nirtogen-doped carbon nanotubes as electrocatalysts for the HER/OER

Chengyan Zhou et al.

Summary: The development of highly effective electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) remains a crucial challenge in electrocatalysis. In this study, a universal strategy of encapsulating Co-based multimetallic alloys/oxide nanoparticles in nitrogen-doped carbon nanotubes (CoM@CNTs) was developed. The as-synthesized CoNiFe/MnO@CNTs electrocatalyst exhibited remarkable HER properties and OER activity, along with excellent stability and durability in alkaline solutions. This strategy provides a new route for fabricating multimetallic-based CNTs as HER/OER electrocatalysts with excellent stability and high catalytic activity.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Article Chemistry, Physical

Heterostructure engineering of iridium species on nickel/molybdenum nitride for highly-efficient anion exchange membrane water electrolyzer

Huijie Wang et al.

Summary: This study successfully developed a novel catalyst for water electrolysis systems, which exhibits high activity and bifunctional characteristics, presenting excellent reaction kinetics in both hydrogen evolution and oxygen evolution reactions. By applying this catalyst to anion-exchange membrane water electrolyzers, superior performance was achieved.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

Article Chemistry, Multidisciplinary

Role of Nanoscale Inhomogeneities in Co2FeO4 Catalysts during the Oxygen Evolution Reaction

Felix Thomas Haase et al.

Summary: In this study, two structurally equal Co2FeO4 spinels with different OER activities were compared. One sample showed a metastable precatalyst state and achieved optimum operation quickly, while the other sample required a higher potential to achieve the same activity. Furthermore, the enhanced OER activity was accompanied by improved corrosion resistance.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Article Chemistry, Multidisciplinary

Self-Supported Bimetallic Phosphide Heterojunction-Integrated Electrode Promoting High-Performance Alkaline Anion-Exchange Membrane Water Electrolysis

Lei Guo et al.

Summary: This article reports a general method for fabricating bimetallic phosphide heterojunctions on nickel foam for water electrolysis. The heterojunctions exhibit low overpotentials and high current densities under industrial conditions, demonstrating good electrocatalytic performance.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2022)

Article Chemistry, Applied

Oxygen vacancy-rich amorphous FeNi hydroxide nanoclusters as an efficient electrocatalyst for water oxidation

Youhai Cao et al.

Summary: A one-pot strategy using ionic liquids is proposed to directly synthesize amorphous FexNiy hydroxide nanoclusters with oxygen vacancies, which exhibit high catalytic activity and mass activity in oxygen evolution reaction. The amorphous and distorted structure with abundant oxygen vacancies and the enhanced active site density by downsizing the nanoclusters contribute to the superior activity of these FexNiy hydroxide nanoclusters. This work provides a novel route for enhancing electrocatalytic performance and has significant implications for the future application of amorphous metal hydroxides in catalysis.

JOURNAL OF ENERGY CHEMISTRY (2022)

Article Chemistry, Physical

Role of Ionomers in Anion Exchange Membrane Water Electrolysis: Is Aemion the Answer for Nickel-Based Anodes?

Emily Cossar et al.

Summary: The anode oxygen evolution reaction (OER) limits the overall hydrogen production efficiency of anion exchange membrane water electrolysis (AEMWE). Nickel-iron (NiFe)-based catalysts show excellent activity toward the OER. This study investigates the application of Aemion AEI with a non-noble-metal Ni90Fe10 nanoparticle anode catalyst in AEMWE, and compares it with commercial Fumion and Nafion ionomers.

ACS APPLIED ENERGY MATERIALS (2022)

Article Chemistry, Multidisciplinary

Deciphering the Space Charge Effect of the p-n Junction between Copper Sulfides and Molybdenum Selenides for Efficient Water Electrolysis in a Wide pH Range

Mingzheng Gu et al.

Summary: Researchers designed and synthesized a core-shell structure material CuS@MoSe2, which greatly improves electron transfer and conductivity through the space charge effect and has abundant active interfaces. The material exhibits good electrocatalytic performance in water oxidation.

ACS NANO (2022)

Article Chemistry, Physical

Valence-modified selenospinels as ampere-current-bearing oxygen evolution catalysts

Feifan Yu et al.

Summary: This study presents a new type of high-valence metal modified selenospinels as large-current-density oxygen evolution reaction (OER) catalysts. The optimized Mn-CuCo2Se4 catalyst exhibits prominent OER activity and stability in alkaline media, with a high mass activity and turnover frequency. In situ X-ray absorption spectroscopies reveal the formation of a surface active layer during the OER, responsible for the highly-active large-current-density activity.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Chemistry, Physical

Fabrication of high aspect ratio ceramic micro-channel in diamond wire sawing as catalyst support used in micro-reactor for hydrogen production

Xinying Li et al.

Summary: This paper introduces a cutting method for preparing ceramic micro-channel catalyst supports and successfully fabricates micro-channels with high aspect ratio. The integrity of the micro-channel structures processed by diamond wire sawing is analyzed, and the effect of surface morphology on catalyst loading performance under different processing parameters is studied. The experimental results show that using ceramic microchannel arrays as catalyst supports in hydrogen production can achieve good reaction performance.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Article Chemistry, Physical

Size effects of zeolitic imidazolate framework 67 polyhedrons as Co-catalyst of W-doped BiVO4 electrodes for photoelectrochemically catalytic water oxidation

Yung-Fu Wu et al.

Summary: This study synthesized different sizes of ZIF67 polyhedrons as co-catalysts for W-doped BiVO4 to improve the photoelectrochemical catalytic ability of water oxidation. Decorating ZIF67 on WBVO can enhance light absorption, create active sites, and suppress recombination for improved water oxidation kinetics. The smallest size of ZIF67 provides the largest contacts with WBVO and electrolyte, creating efficient charge transfer paths and numerous active sites. The WBVO/ZIF67 electrode achieved a photocurrent retention rate higher than 80% after continuous illumination for 5000 s.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Article Multidisciplinary Sciences

Promoting nickel oxidation state transitions in single-layer NiFeB hydroxide nanosheets for efficient oxygen evolution

Yuke Bai et al.

Summary: This article presents a synthesis method for single-layer NiFeB hydroxide nanosheets and demonstrates the effectiveness of electron-deficient boron in promoting the formation of high-oxidation-state Ni for improved oxygen evolution activity. Experimental results show that the incorporation of boron into a NiFe hydroxide can cause a cathodic shift of the Ni2+(OH)(2) -> Ni3+delta OOH transition potential and reduce the energy barriers for the reaction. As a result, the catalyst achieves a current density of 100 mA cm(-2) in 1 M KOH and is among the best Ni-based catalysts for this reaction.

NATURE COMMUNICATIONS (2022)

Article Chemistry, Physical

Self-Templated Synthesis of CoFeP @ C Cage-In-Cage Superlattices for Enhanced Electrocatalytic Water Splitting

Yuwei Deng et al.

Summary: In this study, a self-templated strategy is used to fabricate 2D porous electrocatalysts of heterometallic phosphides, which exhibit remarkable activity and stability for water splitting in alkaline media.

ADVANCED ENERGY MATERIALS (2022)

Article Chemistry, Physical

Hierarchical porous nickel supported NiFeOxHy nanosheets for efficient and robust oxygen evolution electrocatalyst under industrial condition

Bo Zhong et al.

Summary: Hydrogen is considered as the most promising alternative energy carrier for the future energy system. Water electrolysis, as an innovative method for green hydrogen production, is hindered by the slow kinetics of the oxygen evolution reaction (OER). The development of efficient and robust electrocatalysts for OER is crucial for promoting the hydrogen industry.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Chemistry, Physical

Chemical transformation approach for high-performance ternary NiFeCo metal compound-based water splitting electrodes

Jooyoung Lee et al.

Summary: Developing high-efficiency and cost-efficient electrodes for hydrogen and oxygen evolution reactions is a major challenge in water electrolysis technology. A chemical transformation route was developed to produce high-performance OER and HER electrodes, which outperformed most other catalysts reported to date. An alkaline water electrolyzer based on these electrodes achieved a current density of 10 mA/cm(2) at an only 1.47 V-cell, while an anion exchange membrane water electrolyzer reached a current density of 500 mA/cm(2) at an only 1.75 V-cell.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Chemistry, Physical

Branch-leaf-shaped CuNi@NiFeCu nanodendrites as highly efficient electrocatalysts for overall water splitting

Dong Cao et al.

Summary: This study successfully synthesized distinctive branch-leaf-shaped CuNi@NiFeCu nanodendrites as an efficient electrocatalyst for water splitting. The optimized structure prevents agglomeration of nanosheets, provides numerous crystalline-amorphous interfaces, and oxygen vacancies, which enhances reaction kinetics and overall performance. This work presents an original strategy to improve the activity of 2D materials.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Engineering, Environmental

In situ semi-sacrificial template-assisted growth of ultrathin metal-organic framework nanosheets for electrocatalytic oxygen evolution

Mengyi Han et al.

Summary: In this study, a new strategy was developed to grow ultrathin BMOFNs on NiCo-LDH, creating non-noble metal electrocatalysts that are both active and stable. The optimized NiCo-LDH@MOFs heterostructure exhibited superior electrocatalytic activity and enhanced durability, showcasing advanced AFM-IR technology to investigate the formation of 2D-2D heterogeneous structures in NiCo-LDH@MOFs. This work demonstrates an in-situ growth strategy for high-performance ultrathin MOF-based electrocatalysts and provides insights into the morphology-structure-composition evolution of the nanoscale electrocatalyst.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Chemistry, Physical

Superhydrophilic 3D peony flower-like Mo-doped Ni2S3@NiFe LDH heterostructure electrocatalyst for accelerating water splitting

Xiaojuan Feng et al.

Summary: The study successfully synthesized a novel 3D peony flower-like electrocatalyst with superior electrocatalytic activity for oxygen evolution reaction and hydrogen evolution reaction, significantly improving the efficiency of water splitting. This innovative electrocatalyst shows outstanding performance, providing more accessible active sites, strong hydrophilic surfaces, and fast electron transfer, leading to enhanced electrocatalytic activity.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Chemistry, Physical

Sandwich-like Co(OH)x/Ag/Co(OH)2 nanosheet composites for oxygen evolution reaction in anion exchange membrane water electrolyzer

Wenwu Guo et al.

Summary: Efficient and durable nanosheet composites based on Co(OH)(x)/Ag/Co(OH)(2) were developed as effective electrocatalysts for the oxygen evolution reaction (OER) in alkaline media. These composites exhibited excellent OER activity with low overpotential and high current density, showing potential for application in water electrolysis for hydrogen production.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

Article Chemistry, Multidisciplinary

Tip-Enhanced Electric Field: A New Mechanism Promoting Mass Transfer in Oxygen Evolution Reactions

Peng Liu et al.

Summary: In this study, NiFe alloy nanocone arrays were used to enhance the oxygen evolution reaction (OER) rate and outperform state-of-the-art OER electrocatalysts. The high-curvature tips on the nanocones induce a local electric field that significantly increases the concentration of hydroxide ions near the active sites, promoting OER activity. This local field enhanced OER kinetics is suggested to be a generic effect applicable to other OER catalysts.

ADVANCED MATERIALS (2021)

Article Chemistry, Multidisciplinary

Engineering Ultrafine NiFe-LDH into Self-Supporting Nanosheets: Separation-and-Reunion Strategy to Expose Additional Edge Sites for Oxygen Evolution

Zhihao Zhang et al.

Summary: A strategy for preparing Ni-Fe layered double hydroxide (NiFe-LDH) with abundant exposed edge planes for enhanced oxygen evolution reaction (OER) is reported in this study. The NiFe-LDH/C material shows superior OER performance at a current density of 50 mA cm(-2) due to its unique structural engineering and exposed active edge sites.

SMALL (2021)

Article Chemistry, Multidisciplinary

Highly Effective Freshwater and Seawater Electrolysis Enabled by Atomic Rh-Modulated Co-CoO Lateral Heterostructures

Phan Khanh Linh Tran et al.

Summary: Atomic metal-modulated heterostructures, such as continuous cobalt-cobalt oxide lateral heterostructures implanted with well-dispersed rhodium atoms, have shown promise in developing high-performance multifunctional electrocatalysts for water splitting. The synergistic effects of uniform rhodium atoms and Co-CoO heterostructures provide rich multi-integrated active sites and excellent charge transfer, ultimately enhancing both hydrogen and oxygen evolution activities. In both freshwater and seawater conditions, the material displays superior overpotentials and cell voltages compared to earlier reported catalysts, making it a promising catalyst for green hydrogen generation via electrolysis applications.

SMALL (2021)

Article Nanoscience & Nanotechnology

N-Doped Graphene-Decorated NiCo Alloy Coupled with Mesoporous NiCoMoO Nano-sheet Heterojunction for Enhanced Water Electrolysis Activity at High Current Density

Guangfu Qian et al.

Summary: This study successfully prepared a bifunctional catalyst composed of N-doped graphene-decorated NiCo alloy and mesoporous NiCoMoO nano-sheet, showing outstanding activity and stability for water electrolysis at high current density, indicating potential for industrial application.

NANO-MICRO LETTERS (2021)

Article Chemistry, Physical

Constructing a Hetero-interface Composed of Oxygen Vacancy- Enriched Co3O4 and Crystalline-Amorphous NiFe-LDH for Oxygen Evolution Reaction

Junjun Lv et al.

Summary: The development of a new nickel foam-supported electrocatalyst can optimize the kinetic properties of the oxygen evolution reaction, facilitating electron transfer and electron backtracking to reduce overpotentials and increase current density.

ACS CATALYSIS (2021)

Article Chemistry, Physical

Regulation of Morphology and Electronic Structure of FeCoNi Layered Double Hydroxides for Highly Active and Stable Water Oxidization Catalysts

Xiao Zhang et al.

Summary: This study successfully prepared FeCoNi-LDHs with high activity and stability for the oxygen evolution reaction (OER) using a simple room-temperature-stirring strategy. The material features hollow structure and assembly of ultrathin layered nanosheets, showing significantly improved activity and stability compared to IrO2.

ADVANCED ENERGY MATERIALS (2021)

Article Nanoscience & Nanotechnology

Iron Doped in the Subsurface of CuS Nanosheets by Interionic Redox: Highly Efficient Electrocatalysts toward the Oxygen Evolution Reaction

Jing Chen et al.

Summary: The study demonstrates the successful doping of Fe(II) into CuS nanosheets to create a novel electrocatalyst with improved oxygen evolution reaction performance. Coexistence of Fe(II) and Fe(III) in the nanosheets is found to be beneficial for OER through valence regulation, and optimization of multiple factors leads to enhanced catalytic activity. The research provides a strategy for atomic-scale engineering of nanocatalysts and offers insights for the design of novel and efficient electrocatalysts.

ACS APPLIED MATERIALS & INTERFACES (2021)

Article Chemistry, Multidisciplinary

Improved Interface Charge Transfer and Redistribution in CuO-CoOOH p-n Heterojunction Nanoarray Electrocatalyst for Enhanced Oxygen Evolution Reaction

Jing Hu et al.

Summary: The successful construction of CuO@CoOOH p-n heterojunction electrocatalyst through in situ anodic oxidation on copper foam shows significantly enhanced OER performance, offering new avenues for industrial-scale production.

ADVANCED SCIENCE (2021)

Article Chemistry, Physical

Unveiling the Impact of Fe Incorporation on Intrinsic Performance of Reconstructed Water Oxidation Electrocatalyst

N. Clament Sagaya Selvam et al.

Summary: The surface dynamics of precatalysts during the oxygen evolution reaction (OER), especially under high current density, can lead to inconsistent performance. By incorporating Fe into the reconstruction of precatalysts, the resulting heterointerface structures enriched with high valence active sites significantly enhance OER activity and long-term stability. Density functional theory calculations show that Fe-incorporated electrocatalysts have optimal binding energies and reduced overpotential compared to Fe-undoped ones.

ACS ENERGY LETTERS (2021)

Article Chemistry, Physical

Walnut kernel-like iron-cobalt-nickel sulfide nanosheets directly grown on nickel foam: A binder-free electrocatalyst for high-efficiency oxygen evolution reaction

Ru-Lan Zhang et al.

Summary: The study developed a simple room-temperature sulfuration method for the in situ synthesis of walnut kernel-like iron-cobalt-nickel sulfide nanosheets on nickel foam, which exhibited abundant active sites and a large electrochemically active surface area. The FeCoNiSx/NF showed high OER performances with small over potentials and a small Tafel slope, and also acted as the anode in overall water electrolysis with satisfactory results, providing valuable insights for rational construction of nonprecious electrocatalysts in electrochemical energy technologies.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2021)

Article Nanoscience & Nanotechnology

Design Principles of NiFe-Layered Double Hydroxide Anode Catalysts for Anion Exchange Membrane Water Electrolyzers

Sun Seo Jeon et al.

Summary: Based on the research, using carbonaceous materials for anodes has detrimental effects on the stability of AEMWEs at industrially relevant current densities. Therefore, a facile monolayer structuring is suggested to overcome low electrical conductivity of NiFe-LDH and improve mass transport without using carbonaceous materials. This work highlights electrical conductivity and hydrophilicity of catalysts in membrane-electrode-assembly as key factors for high-performance AEMWEs.

ACS APPLIED MATERIALS & INTERFACES (2021)

Article Engineering, Environmental

Ru2P nanofibers for high-performance anion exchange membrane water electrolyzer

Jae-Chan Kim et al.

Summary: Ru2P nanofibers exhibit high catalytic activity for hydrogen evolution reaction and demonstrate better performance than commercial Pt/C, especially in high current density region, due to the structural advantage of porous catalyst layer enhancing mass transfer of reactant and product.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Chemistry, Physical

Coaxial Ni3S2@CoMoS4/NiFeOOH nanorods for energy-saving water splitting and urea electrolysis

Wanshan Mai et al.

Summary: This study focuses on the sluggish kinetics limitation in electrochemical water splitting for hydrogen production and proposes a novel Ni-3-S-2@CoMoS4/NiFeOOH heterostructure design, achieving remarkable bifunctional activity and excellent stability in alkaline water electrolysis and urea electrolysis.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Multidisciplinary Sciences

Engineering single-atomic ruthenium catalytic sites on defective nickel-iron layered double hydroxide for overall water splitting

Panlong Zhai et al.

Summary: Rational design of single atom catalyst is critical for efficient sustainable energy conversion. Single-atomic-site ruthenium stabilized on defective nickel-iron layered double hydroxide nanosheets achieve superior HER and OER performance in alkaline media.

NATURE COMMUNICATIONS (2021)

Article Chemistry, Physical

Dual-coupling ultrasmall iron-Ni2P into P-doped porous carbon sheets assembled CuxS nanobrush arrays for overall water splitting

Duy Thanh Tran et al.

Summary: A novel electrocatalyst was designed with dual-coupling iron and Ni2P for efficient overall water splitting, showing superior catalytic activities for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The synergistic effects between iron and ultrasmall Ni2P nanoparticles contributed significantly to the low required overpotential for achieving high current densities. The proposed Fe-Ni2P@PC/CuxS material exhibited excellent performance in electrolyzer cell, surpassing recently reported ones with a smaller cell voltage at high current responses.

NANO ENERGY (2021)

Article Chemistry, Applied

Self-supporting NiFe LDH-MoSx integrated electrode for highly efficient water splitting at the industrial electrolysis conditions

Han Zhang et al.

Summary: The self-supporting NiFe LDH-MoSx integrated electrode shows excellent performance for water oxidation under normal alkaline and simulated industrial electrolysis conditions, indicating its potential for large-scale industrial water electrolysis applications.

CHINESE JOURNAL OF CATALYSIS (2021)

Article Multidisciplinary Sciences

Approaching the activity limit of CoSe2 for oxygen evolution via Fe doping and Co vacancy

Yuhai Dou et al.

NATURE COMMUNICATIONS (2020)

Article Nanoscience & Nanotechnology

Graphdiyne-Supported NiFe Layered Double Hydroxide Nanosheets as Functional Electrocatalysts for Oxygen Evolution

Guodong Shi et al.

ACS APPLIED MATERIALS & INTERFACES (2019)

Article Chemistry, Physical

3D MnCo2O4@CoS nanoarrays with different morphologies as an electrocatalyst for oxygen evolution reaction

Xiaoqiang Du et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2019)

Article Chemistry, Physical

Bifunctional CoNi/CoFe2O4/Ni foam electrodes for efficient overall water splitting at a high current density

Shasha Li et al.

JOURNAL OF MATERIALS CHEMISTRY A (2018)

Article Chemistry, Multidisciplinary

Highly Active Three-Dimensional NiFe/Cu2O Nanowires/Cu Foam Electrode for Water Oxidation

Hu Chen et al.

CHEMSUSCHEM (2017)