Recent advances in Ru-based electrocatalysts for oxygen evolution reaction

Article Nanoscience & Nanotechnology

Revealing the pH-Universal Electrocatalytic Activity of Co-Doped RuO2 toward the Water Oxidation Reaction

Ragunath Madhu et al.

Summary: The study developed a Co-doped RuO2 nanorod material as an OER electrocatalyst in universal pH conditions, exhibiting lower overpotential values and smaller Tafel slopes in alkaline environments, showing promising performance.

ACS APPLIED MATERIALS & INTERFACES (2022)

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Article Chemistry, Multidisciplinary

Microenvironment Engineering of Ru Single-Atom Catalysts by Regulating the Cation Vacancies in NiFe-Layered Double Hydroxides

Jing Jin et al.

Summary: A series of Ru single-atom catalysts with tunable geometric and electronic structures were constructed using NiFe-layered double hydroxides as supports, leading to higher efficiency in benzyl alcohol oxidation.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Review Chemistry, Multidisciplinary

Confinement Effects in Individual Carbon Encapsulated Nonprecious Metal-Based Electrocatalysts

Ling Shen et al.

Summary: This review discusses the impact of confinement effects in NPM-based nanoparticles encapsulated in carbon nanoshells on electrocatalytic activity and stability. It provides a detailed introduction to the synthesis methods, mechanistic studies, and performance improvement mechanisms of NPM-based core@carbon shell electrocatalysts.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Chemistry, Multidisciplinary

Ru Coordinated ZnIn2S4 Triggers Local Lattice-Strain Engineering to Endow High-Efficiency Electrocatalyst for Advanced Zn-Air Batteries

Zhiqian Hou et al.

Summary: By regulating the partial coordination environment mutation of catalytic sites, the intrinsic activity of the catalyst can be activated and electron transfer can be accelerated, achieving efficient oxygen reduction reaction. This research provides a promising avenue for constructing lattice-strain engineering.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Electrochemistry

Ultrafast synthesis of Cu2O octahedrons inlaid in Ni foam for efficient alkaline water/seawater electrolysis

Huan Wang et al.

Summary: This study reports an ultrafast synthesis method for Cu2O octahedrons and their inlay in Ni foam, resulting in a self-supporting electrocatalyst. The electrocatalyst displays superior activity and stability in both oxygen and hydrogen evolution reactions, and exhibits low cell voltage and high current density when applied as bifunctional electrodes in alkaline seawater splitting.

ELECTROCHEMISTRY COMMUNICATIONS (2022)

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Article Chemistry, Multidisciplinary

A thermochemical study of iron aluminate-based materials: a preferred class for isothermal water splitting

Kent J. Warren et al.

Summary: The use of hydrogen as a renewable fuel has been hindered by the lack of clean and economical production methods. Traditional solar thermochemical processes have limitations in efficiency. In this study, it is shown that isothermal water splitting using iron aluminate-based materials can overcome these limitations and achieve a higher hydrogen production capacity.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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Article Chemistry, Multidisciplinary

Heterostructure of RuO2-RuP2/Ru Derived from HMT-based Coordination Polymers as Superior pH-Universal Electrocatalyst for Hydrogen Evolution Reaction

Ying Zhao et al.

Summary: In this study, a self-supported heterostructure of RuO2-RuP2/Ru on the N, P co-doped carbon matrix was developed as pH-universal electrocatalysts. The resulting material exhibited excellent activity and stability at various pH values, which shows great potential for application in electrochemical energy storage and conversion.

SMALL (2022)

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Review Chemistry, Multidisciplinary

High-Entropy Alloys for Electrocatalysis: Design, Characterization, and Applications

Yiqiong Zhang et al.

Summary: High-entropy alloys are expected to be effective electrocatalytic materials due to their adjustable composition and unique properties. Recent studies have focused on the relationship between the structure and composition of HEAs and their electrocatalytic performance, proposing design strategies for optimizing these materials. The review also predicts future trends and issues in the field of HEAs for further development.

SMALL (2022)

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Review Chemistry, Physical

Strain Engineering in Electrocatalysts: Fundamentals, Progress, and Perspectives

Xiaobo Yang et al.

Summary: Strain engineering of nanomaterials, by designing, tuning, or controlling surface strains, is an effective strategy to achieve outstanding performance in various electrocatalytic reactions. Recent progress has focused on the development of strain-rich electrocatalysts (SREs) and their application, highlighting the relationship between strain and performance.

ADVANCED ENERGY MATERIALS (2022)

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Article Chemistry, Inorganic & Nuclear

Highly dispersed Ru nanoclusters anchored on B,N co-doped carbon nanotubes for water splitting

Meihong Fan et al.

Summary: Boron and nitrogen co-doped carbon nanotubes (CNTs) act as an effective substrate material for Ru cluster loading, improving the catalytic activity for hydrogen and oxygen evolution reactions. The Ru@B,N-CNTs show excellent electrocatalytic performance and high catalytic stability in alkaline conditions.

INORGANIC CHEMISTRY FRONTIERS (2022)

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Article Chemistry, Multidisciplinary

Electronic Structure Engineering of Single-Atom Ru Sites via Co-N4 Sites for Bifunctional pH-Universal Water Splitting

Chengli Rong et al.

Summary: The development of bifunctional water-splitting electrocatalysts that are efficient and stable over a wide range of pH is crucial but challenging. This study reports an atomically dispersed Ru/Co dual-sites catalyst anchored on N-doped carbon (Ru/Co-N-C) for excellent oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in both acidic and alkaline electrolytes. The catalyst shows superior performance compared to benchmark catalysts Pt/C and RuO2, with low overpotentials and high current densities. Theoretical calculations and experimental results demonstrate that the introduction of Co-N4 sites into Ru/Co-N-C modifies the electronic structure of Ru and enhances the bonding strength with oxygen/hydrogen intermediate species, leading to improved OER and HER performance. Furthermore, the incorporation of Co-N4 sites improves the corrosion-resistance of Ru/Co-N-C during electrolysis. The Ru/Co-N-C catalyst has been successfully applied in a proton exchange membrane water electrolyzer and shows stable operation at a high current density.

ADVANCED MATERIALS (2022)

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Article Chemistry, Physical

Confined Ultrafine Pt in Porous Carbon Fibers and Their N-EnhancedHeavy d-?Effect

Yu-Xuan Xiao et al.

Summary: The heavy d-pi effect is an important theoretical model for strong Pt-C interaction, and confining Pt nanoparticles within N-doped carbon can enhance this effect. In this study, confined ultrafine Pt-NPs in N-doped porous carbon fibers were successfully synthesized and showed outstanding catalytic activity and durability in the hydrogen evolution reaction.

CHEMISTRY OF MATERIALS (2022)

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Article Materials Science, Multidisciplinary

Stoichiometry design in hierarchical CoNiFe phosphide for highly efficient water oxidation

Jiangbo Chen et al.

Summary: The rational composition design of trimetallic phosphide catalysts is crucial for enhancing surface reactions and improving catalytic performance. In this study, hierarchical CoxNiyFezP catalysts with precise control of stoichiometric metallic elements were synthesized. Among them, Co1.3Ni0.5Fe0.2P showed the most optimal composition, exhibiting remarkable catalytic activity and long-term stability for the oxygen evolution reaction (OER). It was found that the surface phosphorus in Co1.3Ni0.5Fe0.2P was replaced by oxygen under the OER process. Density functional theory calculations before and after long-term stability tests revealed an increase in the density of states near the Fermi level of Co1.3Ni0.5Fe0.2P/Co1.3Ni0.5Fe0.2O, which could enhance the adsorption of OH- and improve the OER performance of the catalyst.

SCIENCE CHINA-MATERIALS (2022)

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Article Multidisciplinary Sciences

Single-site Pt-doped RuO2 hollow nanospheres with interstitial C for high-performance acidic overall water splitting

Juan Wang et al.

Summary: In this study, hollow Pt-doped RuO2 nanospheres with interstitial carbon were reported as highly active and stable electrocatalysts for overall water splitting. These catalysts exhibited superior performance compared to most reported catalysts and showed promising stability during continuous operation.

SCIENCE ADVANCES (2022)

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Review Chemistry, Multidisciplinary

Pyrochlores for Advanced Oxygen Electrocatalysis

Pralay Gayen et al.

Summary: This article discusses the importance of low-cost electrocatalysts in fuel cells, water electrolyzers, unitized regenerative fuel cells, and metal-air batteries by studying the structure-activity relationship of pyrochlore oxides. Pyrochlore oxides have the ability to tune their structure and electronic properties, resulting in excellent bifunctional oxygen electrocatalytic activity and high OER selectivity for a wide range of applications. The article also discusses the recent developments and applications of pyrochlore-based electrocatalysts.

ACCOUNTS OF CHEMICAL RESEARCH (2022)

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Article Chemistry, Multidisciplinary

Iridium Doped Pyrochlore Ruthenates for Efficient and Durable Electrocatalytic Oxygen Evolution in Acidic Media

Hai Liu et al.

Summary: Developing highly active, durable, and cost-effective electrocatalysts for the oxygen evolution reaction (OER) is crucial for proton exchange membrane (PEM) water electrolysis techniques. The study introduces iridium-doped yttrium ruthenates pyrochlore catalysts with better activity and higher durability than commercial RuO2, IrO2, and most of the reported Ru or Ir-based OER electrocatalysts.

SMALL (2022)

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Review Chemistry, Multidisciplinary

Hierarchical Design in Nanoporous Metals

Jie Ying et al.

Summary: This article presents a summary of recent significant advancements in the development of hierarchically porous metals, with a focus on synthetic strategies, hierarchical design in structure-function, and corresponding applications. The current challenges and future prospects in this field are also discussed.

ADVANCED SCIENCE (2022)

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Article Chemistry, Physical

Efficient Water Dissociation on Confined Ultrafine Pt via Pyridinic N-Enhanced Heavy d-p Interaction

Yuan Dong et al.

Summary: In this study, ultrafine Pt nanoparticles were confined into N-doped carbon by an in situ galvanic replacement reaction. The pyridinic N-enhanced heavy d-pi interaction was found to significantly enhance the water dissociation catalytic activity of Pt. The electron-deficient Pt generated by this enhanced heavy d-pi effect exhibited an ultralow overpotential for hydrogen evolution and an ultrahigh mass current density, greatly improving the performance for the alkaline HER.

CHEMISTRY OF MATERIALS (2022)

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Review Chemistry, Applied

Roles of heteroatoms in electrocatalysts for alkaline water splitting: A review focusing on the reaction mechanism

Chuqiang Huang et al.

Summary: This article provides an overview of the key role of heteroatoms in enhancing catalytic activity in alkaline media. By studying the reaction pathways, it is elucidated that heteroatoms can optimize the interactions between active sites and intermediates, leading to improved intrinsic activity. The article summarizes a series of heteroatom-modified electrocatalysts and discusses the important roles of heteroatoms in the oxygen and hydrogen evolution reaction pathways. Finally, challenges and perspectives for heteroatom-modified electrodes are discussed.

CHINESE JOURNAL OF CATALYSIS (2022)

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Article Chemistry, Inorganic & Nuclear

Strain engineering in single-atom catalysts: GaPS4 for bifunctional oxygen reduction and evolution

Xuefei Liu et al.

Summary: This study reports a theoretical investigation on 34 transition metal doped two-dimensional GaPS4 catalysts and explores the method of tuning their activity through strain engineering. It is found that Pt@V-S1-GaPS4 exhibits excellent stability and bifunctional electrocatalytic activity for OER/ORR. Furthermore, the bond angles and the highest occupied orbitals of the doped transition metal atoms are identified as descriptors for explaining the underlying strain tunability mechanism. Machine learning predicts that the number of d electrons, bond length, and electronegativity are the main descriptors determining the catalytic activity.

INORGANIC CHEMISTRY FRONTIERS (2022)

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Article Chemistry, Physical

Confinement and antenna effect for ultrasmall Y2O3:Eu3+nanocrystals supported by MOF with enhanced near-UV light absorption thereby enhanced luminescence and excellently multifunctional applications

Hongyi Xu et al.

Summary: A novel host-guest luminous system is designed with ultrasmall Y2O3:Eu3+ nanocrystals fixed inside MOF (Eu/Y-BTC) to enhance luminescence through quantum confinement, spatial confinement, and antenna effect. The system demonstrates significantly red-shifted and broadened charge transfer band, allowing for excellent applications in white LEDs and dye-sensitized solar cells. The multifunctional composite product of Y2O3:Eu3+/(Eu/Y-BTC) is anticipated to open new avenues in white LEDs and DSSCs.

NANO RESEARCH (2021)

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Article Chemistry, Multidisciplinary

Silver Single-Atom Catalyst for Efficient Electrochemical CO2 Reduction Synthesized from Thermal Transformation and Surface Reconstruction

Ningqiang Zhang et al.

Summary: An Ag-1 single-atom catalyst, synthesized from Ag nanoparticles and MnO2 surface reconstruction, shows high efficiency and stability for electrochemical CO2 reduction. DFT calculations indicate that single Ag sites act exclusively as active sites in the CO2RR.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Strain Engineering of a MXene/CNT Hierarchical Porous Hollow Microsphere Electrocatalyst for a High-Efficiency Lithium Polysulfide Conversion Process

Xin Wang et al.

Summary: Tensile-strained Mxene/CNT porous microspheres were developed as an electrocatalyst for the lithium polysulfide redox reaction, with internal stress, macroporous framework, and CNT interwoven enhancing their electrochemical performance.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Review Chemistry, Multidisciplinary

Advances in engineering RuO2 electrocatalysts towards oxygen evolution reaction

Cheng Wang et al.

Summary: This article comprehensively reviews the significant role and promising applications of RuO2 and its derivatives in oxygen evolution reaction (OER), starting from the description of OER and detailing the electrocatalytic performance and strategies of RuO2, as well as the challenges and future prospects ahead.

CHINESE CHEMICAL LETTERS (2021)

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Article Engineering, Environmental

Coupling Ru-MoS2 heterostructure with silicon for efficient photoelectrocatalytic water splitting

Fan Zhang et al.

Summary: In this study, a Ru-MoS2 heterostructured catalyst was designed to address the challenges of low charge-separation efficiency and catalytic hydrogen evolution activity in photoelectrochemical water splitting for hydrogen evolution reaction. The engineered electronic structure of Ru-MoS2 significantly decreased charge transfer resistance and optimized electron transportation and Gibbs free energy of hydrogen adsorption, leading to enhanced catalytic HER efficiency. The n+p-Si/Ti/Ru-MoS2 photocathode demonstrated the largest reported photocurrent density for Si-based photocathodes and achieved a high solar-to-hydrogen conversion efficiency.

CHEMICAL ENGINEERING JOURNAL (2021)

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Article Engineering, Environmental

Single-atom platinum or ruthenium on C4N as 2D high-performance electrocatalysts for oxygen reduction reaction

Zhou Yang et al.

Summary: C4N was synthesized from 2,3-diyldiamine phenazine via one-step hydrothermal method and loaded with single-atom metal to form new electrocatalysts, which exhibit better ORR performance compared with commercial Pt/C.

CHEMICAL ENGINEERING JOURNAL (2021)

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Article Chemistry, Physical

Linking Changes in Reaction Kinetics and Atomic-Level Surface Structures on a Supported Ru Catalyst for CO Oxidation

Benjamin K. Miller et al.

Summary: A fundamental challenge in heterogeneous catalysis is understanding the relationship between surface structure and reactivity, with operando approaches being valuable in differentiating active and spectator structures. An atomic resolution operando approach using mass spectrometry and imaging techniques was applied to the oxidation of carbon monoxide over a supported ruthenium catalyst, revealing that RuO2 layers formed under some reaction conditions are actually spectator species that diminish the catalyst's activity.

ACS CATALYSIS (2021)

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Article Chemistry, Multidisciplinary

Regulative Electronic States around Ruthenium/Ruthenium Disulphide Heterointerfaces for Efficient Water Splitting in Acidic Media

Jiawei Zhu et al.

Summary: Theoretical calculations and experimental results demonstrate that Ru/RuS2 heterostructure possesses optimized catalytic performance, especially showing extremely high activity and performance in acidic media.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Materials Science, Multidisciplinary

Rare-earth-regulated Ru-O interaction within the pyrochlore ruthenate for electrocatalytic oxygen evolution in acidic media

Hai Liu et al.

Summary: By constructing pyrochlore rare-earth ruthenate structures with a series of rare-earth elements (Nd, Sm, Gd, Er, and Yb), the electronic structure of the Ru sites could be tuned, leading to an improved OER performance in acid media by reducing the strong bonding between Ru sites and oxygen intermediates. Among them, Nd2Ru2O7 exhibited the lowest OER onset overpotential and Tafel slope, along with significantly higher intrinsic activity and durability compared to RuO2 catalyst.

SCIENCE CHINA-MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Metal Substitution Steering Electron Correlations in Pyrochlore Ruthenates for Efficient Acidic Water Oxidation

Ning Zhang et al.

Summary: This study successfully improves the OER activity of pyrochlore ruthenate in acidic media by partially substituting Y3+ ions, achieving high intrinsic mass activity and excellent stability. By manipulating the electronic states to enhance Ru-O covalency and rearrange band alignment, the charge transfer energy is reduced, promoting the occurrence of chemical reactions.

ACS NANO (2021)

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Article Chemistry, Multidisciplinary

Ultralong PtPd Alloyed Nanowires Anchored on Graphene for Efficient Methanol Oxidation Reaction

Ling Shen et al.

Summary: In this study, PtPd alloyed nanowires anchored on graphene were synthesized without using templates or surfactants, showing excellent electrochemical activity towards methanol oxidation reaction. The integration of ultralong PtPd nanowires and stable graphene support resulted in higher current density and better durability compared to pure Pt and commercial Pt/C catalysts.

CHEMISTRY-AN ASIAN JOURNAL (2021)

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Article Chemistry, Multidisciplinary

Stabilizing Highly Active Ru Sites by Suppressing Lattice Oxygen Participation in Acidic Water Oxidation

Yunzhou Wen et al.

Summary: Ternary oxide electrocatalysts consisting of Sr, Ru, and Ir have been developed to achieve high OER activity and stability in acidic electrolytes. The interaction in the Ru-O-Ir local structure suppresses the participation of lattice oxygen during OER, thus improving stability, while modulation of the electronic structure of active Ru sites optimizes the binding energetics of OER oxo-intermediates.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Chemistry, Multidisciplinary

Sulfate-Functionalized RuFeOx as Highly Efficient Oxygen Evolution Reaction Electrocatalyst in Acid

Yanrong Xue et al.

Summary: The sulfate-functionalized RuFeOx catalyst, with both sulfate anion and Fe cation doping, shows remarkable OER performance with low overpotential and enhanced stability. The sulfate dopants weaken the adsorption of *OO-H intermediate, while Fe dopants promote the deprotonation of water molecules for *OOH formation, contributing to the excellent OER activity and stability of S-RuFeOx.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Review Chemistry, Multidisciplinary

What Makes High-Entropy Alloys Exceptional Electrocatalysts?

Tobias Loeffler et al.

Summary: By discussing the existing fundamental knowledge, researchers explore new concepts in catalyst design with the formation of multiple active sites in compositionally complex solid solution materials, commonly known as high-entropy alloys. The study critically assesses the opportunities and limitations of this material class while proposing a roadmap for potential breakthroughs in (electro)catalysis research.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Sodium-Decorated Amorphous/Crystalline RuO2 with Rich Oxygen Vacancies: A Robust pH-Universal Oxygen Evolution Electrocatalyst

Lijie Zhang et al.

Summary: The study developed sodium-decorated amorphous/crystalline RuO2 with rich oxygen vacancies as a pH-universal OER electrocatalyst, showing remarkable acid resistance and high catalytic stability. The introduction of Na dopant and oxygen vacancy in RuO2 was found to lower the energy barrier for OER by weakening the adsorption strength of the OER intermediates.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Constructing RuCoOx/NC Nanosheets with Low Crystallinity within ZIF-9 as Bifunctional Catalysts for Highly Efficient Overall Water Splitting

Yongxiao Tuo et al.

Summary: In this study, a Ru-Co oxides and carbon nitrides hybrid electrocatalyst was developed by regulating the calcination temperature and inducing strong interactions between Co and Ru species. The optimized catalyst exhibited good electrocatalytic activities and durability in both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER).

CHEMISTRY-AN ASIAN JOURNAL (2021)

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Article Chemistry, Multidisciplinary

Highly Dispersed Pt Nanoparticles Embedded in N-Doped Porous Carbon for Efficient Hydrogen Evolution

Yuan Dong et al.

Summary: A novel strategy was presented to synthesize highly dispersed Pt nanoparticles embedded in N-doped porous carbon, exhibiting superior activity and durability in the hydrogen evolution reaction compared to commercial Pt/C catalyst. The excellent performance can be attributed to the combined features of catalyst and support material, including Pt dispersion, surface area and nitrogen doping of carbon, and strong metal-support interaction.

CHEMISTRY-AN ASIAN JOURNAL (2021)

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Article Chemistry, Multidisciplinary

Hierarchically Fractal PtPdCu Sponges and their Directed Mass- and Electron-Transfer Effects

Yu-Xuan Xiao et al.

Summary: Fractal PtPdCu hollow sponges (PtPdCu-HS) are introduced as a novel electrocatalyst with directed mass- and electron-transfer, exhibiting significantly higher performance compared to commercial Pt/C. A new concept and mechanism of directed transfer effects are proposed, offering possibilities for designing high-activity and stable nanomaterials for electrocatalysis and other practical applications.

NANO LETTERS (2021)

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Article Multidisciplinary Sciences

Unextractable fossil fuels in a 1.5 °C world

Dan Welsby et al.

Summary: Parties to the 2015 Paris Agreement have pledged to limit global warming to below 2 degrees Celsius, but a sharp decline in fossil fuel use is required to keep the temperature increase below 1.5 degrees Celsius. A global energy systems model shows that by 2050, 60% of oil and fossil methane gas, and 90% of coal must remain unextracted to stay within a 1.5 degrees Celsius carbon budget.

NATURE (2021)

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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)

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Article Chemistry, Physical

Fundamental Studies of Planar Single-Crystalline Oxide Model Electrodes (RuO2, IrO2) for Acidic Water Splitting

Herbert Over

Summary: This passage discusses electrocatalytic water splitting and the use of RuO2 and IrO2 in the OER process under acidic conditions. It also touches on the microscopic understanding of corrosion processes and the rate-determining steps in OER over these oxides. Ultimately, it aims to uncover the material properties underlying observed electrochemical stability and activity.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

A chemical etching strategy to improve and stabilize RuO2-based nanoassemblies for acidic oxygen evolution

Qing Yao et al.

Summary: This study demonstrates a chemical etching strategy to fabricate a Ru/Fe oxide catalyst for OER, where etching of Fe species leads to the generation of abundant vacancies and enhances activity and stability.

NANO ENERGY (2021)

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Review Chemistry, Physical

Stability challenges of electrocatalytic oxygen evolution reaction: From mechanistic understanding to reactor design

Feng-Yang Chen et al.

Summary: This review summarizes critical mechanisms that could influence the stability of the oxygen evolution reaction (OER) and discusses the importance of stability in large-scale electrolysis industrialization. Additionally, it provides catalyst and reactor design principles for overcoming OER stability challenges.

JOULE (2021)

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Article Chemistry, Multidisciplinary

Nanoporous ultra-high-entropy alloys containing fourteen elements for water splitting electrocatalysis

Ze-Xing Cai et al.

Summary: This study demonstrates the facile synthesis of nanoporous ultra-high-entropy alloys (np-UHEAs) with hierarchical porosity via dealloying. These alloys, containing up to 14 elements, exhibit high catalytic activities and electrochemical stabilities in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in acidic media, outperforming commercial Pt/graphene and IrO2 catalysts. These results provide valuable insights for the selection of elements as catalysts for various applications.

CHEMICAL SCIENCE (2021)

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Review Chemistry, Multidisciplinary

Improving the performance stability of direct seawater electrolysis: from catalyst design to electrode engineering

Weiran Zheng et al.

Summary: Direct seawater electrolysis offers a new opportunity to reduce the cost of hydrogen production, but challenges in long-term performance stability must be addressed. Common causes of performance decline during seawater electrolysis are discussed, along with ongoing efforts in counter-measurements such as electrocatalyst optimization and cell design. The need for a consensus on evaluating the stability of seawater electrolysis is emphasized.

NANOSCALE (2021)

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Article Chemistry, Physical

Rose-like, ruthenium-modified cobalt nitride nanoflowers grown in situ on an MXene matrix for efficient and stable water electrolysis

Liang Yan et al.

Summary: A novel bifunctional electrocatalyst, Ru-CoN/Ti3C2Tx MXene, has been synthesized with good conductivity and optimized electronic structure, displaying remarkable and stable performance in water electrolysis for both hydrogen and oxygen evolution reactions. This work provides a new strategy for the design and fabrication of efficient and nonprecious catalysts for electrochemical energy systems.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Review Chemistry, Multidisciplinary

Multi-Sites Electrocatalysis in High-Entropy Alloys

Hongdong Li et al.

Summary: High-entropy alloys have unique advantages in electrocatalysis, allowing for the formation of new and tailorable active sites, but further exploration is needed in catalyst design, element interaction, and active site determination. This review focuses on important progress in multi-sites electrocatalysis in HEAs, providing a basis for element selection and design, as well as highlighting remaining challenges and future research directions.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Review Chemistry, Physical

Recent progress on the synthesis and oxygen reduction applications of Fe-based single-atom and double-atom catalysts

Yan Yan et al.

Summary: Fe-based atomic catalysts show great advantages in the ORR due to high atom-utilization efficiency and well-defined active sites. The high performance is mainly attributed to the coordination condition and electronic structures. Achieving high activity and stability with a high content of metal atoms remains a major challenge.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Review Chemistry, Multidisciplinary

Lattice oxygen redox chemistry in solid-state electrocatalysts for water oxidation

Ning Zhang et al.

Summary: The lattice oxygen-mediated mechanism (LOM) derived from lattice oxygen redox chemistry is playing a significant role in solid-state OER electrocatalysts, providing insights into intrinsic activity and surface reconstruction issues, guiding the exploration of efficient electrocatalysts. Strategies for triggering lattice oxygen redox chemistry to promote intrinsic OER activity, along with theoretical calculations and experimental measurements, are crucial in this research area.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

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Review Chemistry, Physical

Recent advances in doped ruthenium oxides as high-efficiency electrocatalysts for the oxygen evolution reaction

Hainan Sun et al.

Summary: This review presents the recent progress in doped ruthenium oxides as high-efficiency electrocatalysts for the oxygen evolution reaction, with various types of dopants and design strategies summarized. Optimizing the composition of RuO2 can lead to enhanced catalytic activity and excellent stability.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Physical

Interfacing RuO2 with Pt to induce efficient charge transfer from Pt to RuO2 for highly efficient and stable oxygen evolution in acidic media

Taehyun Kwon et al.

Summary: The transfer of charge from Pt to conjoined RuO2 significantly stabilizes the RuO2 phase against overoxidation, improving the OER performance. The study compared the OER performance of three different types of Au@Pt@RuOx nanowires, with the hetero-interfaced type showing the highest OER mass activity.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Physical

Electrochemical hydrogen evolution reaction efficiently catalyzed by Ru-N coupling in defect-rich Ru/g-C3N4 nanosheets

Dongze Li et al.

Summary: Here, we report a facile approach for Ru-N coupling structure fabrication and its contribution to high HER performance, facilitating the development of high-performing Ru-based catalysts.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Review Chemistry, Multidisciplinary

Rational design of oxygen evolution reaction catalysts for seawater electrolysis

Fanghao Zhang et al.

Summary: This review discusses the challenges and strategies for improving the efficiency and stability of seawater electrolysis, focusing on the design of OER catalysts. Various approaches such as constructing 3D hierarchical porous structures, using protective layers, and controlling surface wettability are recommended to synthesize efficient and stable OER catalysts. Additionally, the perspective of designing high-performance catalysts for seawater electrolysis is also provided.

TRENDS IN CHEMISTRY (2021)

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Article Chemistry, Multidisciplinary

PtPd hollow nanocubes with enhanced alloy effect and active facets for efficient methanol oxidation reaction

Yu-Xuan Xiao et al.

Summary: The study presents an alternating-reduction approach for incorporating Pd into Pt shell to produce PtPd hollow nanocubes, showing high catalytic activity and superior durability in the methanol oxidation reaction.

CHEMICAL COMMUNICATIONS (2021)

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Article Chemistry, Physical

Single Ru Atoms Stabilized by Hybrid Amorphous/Crystalline FeCoNi Layered Double Hydroxide for Ultraefficient Oxygen Evolution

Yidong Hu et al.

Summary: Hybrid amorphous/crystalline FeCoNi LDH-supported single Ru atoms catalysts exhibit highly efficient oxygen evolution reaction performance with extremely low overpotential, attributed to the synergistic effects of abundant defect sites, unsaturated coordination sites, and highly symmetric rigid structure providing stability for long-lasting OER.

ADVANCED ENERGY MATERIALS (2021)

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