Ultrathin Carbon Coating and Defect Engineering Promote RuO2 as an Efficient Catalyst for Acidic Oxygen Evolution Reaction with Super-High Durability

Article Multidisciplinary Sciences

Dynamic rhenium dopant boosts ruthenium oxide for durable oxygen evolution

Huanyu Jin et al.

Summary: In this study, a new heteroatom-doping method is reported, which utilizes dynamic electron accepting-donating to enhance the activity and stability of RuO2 catalysts for acidic oxygen evolution reaction.

NATURE COMMUNICATIONS (2023)

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Article Chemistry, Physical

Non-iridium-based electrocatalyst for durable acidic oxygen evolution reaction in proton exchange membrane water electrolysis

Zhen-Yu Wu et al.

Summary: A nickel-stabilized ruthenium dioxide catalyst (Ni-RuO2) is reported as a promising alternative to iridium for proton exchange membrane water electrolysis, with high activity and durability in acidic oxygen evolution reaction. Density functional theory studies and operando mass spectroscopy analysis confirm the stabilization effect of nickel on the catalyst lattice, improving the durability of the oxygen evolution reaction.

NATURE MATERIALS (2023)

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Review Chemistry, Multidisciplinary

Electrocatalysts for the Oxygen Evolution Reaction in Acidic Media

Yichao Lin et al.

Summary: This review comprehensively summarizes, classifies, and discusses the recently reported acidic oxygen evolution reaction (OER) electrocatalysts. The fundamental studies on OER mechanisms and the relationship between activity and stability are highlighted to provide a micro-level understanding of OER catalysis. A stability test protocol is suggested to evaluate intrinsic activity degradation. The challenges and unresolved questions regarding carbon-based materials usage and differences in electrocatalyst performances in acidic electrolytes and PEM-based electrolyzers are also discussed. Suggestions for the most promising electrocatalysts and a perspective for future research are outlined. This review presents a fresh impetus and guideline for the rational design and synthesis of high-performance acidic OER electrocatalysts for PEM-based water electrolysis.

ADVANCED MATERIALS (2023)

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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 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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Article Chemistry, Multidisciplinary

Interfacial Carbon Makes Nano-Particulate RuO2 an Efficient, Stable, pH-Universal Catalyst for Splitting of Seawater

Fang Fang et al.

Summary: An electrocatalyst composed of RuO2 surrounded by interfacial carbon is synthesized through controllable oxidization-calcination. This electrocatalyst provides efficient charge transfer, numerous active sites, and promising activity for pH-universal electrocatalytic overall seawater splitting. A mechanism for the catalytic activity of the composite is proposed based on the experimental results. Finally, a solar-driven system is assembled and used for overall seawater splitting, showing 95% Faraday efficiency.

SMALL (2022)

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Article Chemistry, Physical

Synergistic co-doping induced high catalytic activities of La/Fe doped Co3O4 towards oxygen reduction/evolution reactions for Zn-air batteries

Zhongyuan Xia et al.

Summary: La/Fe co-doped Co3O4 nanoparticles supported on aminated carbon nanotubes exhibit high bifunctional catalytic activity for oxygen reduction/revolution reactions. The unique La/Fe co-doping structure increases both the ORR and OER catalytic activities of the nanoparticles. Carbon coating further enhances the catalytic activities of the nanoparticles. When used in zinc-air batteries, carbon coated LaFe-Co3O4/NCNTs show high power density and cycling stability.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Chemistry, Multidisciplinary

The low overpotential regime of acidic water oxidation part II: trends in metal and oxygen stability numbers

Soren B. Scott et al.

Summary: This study investigates the stability of RuOx and IrOx electrocatalysts during the oxygen evolution reaction (OER) under low overpotential conditions. Quantitative analysis and isotope labelling experiments reveal that RuOx materials have a higher dissolution rate compared to the rate of oxygen incorporation, while for IrOx-based catalysts, the two rates are comparable. It is also found that amorphous RuOx exhibits distinct Tafel slopes for metal dissolution and labelled OER.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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Article Chemistry, Multidisciplinary

The low overpotential regime of acidic water oxidation part I: the importance of O2 detection

Soren B. Scott et al.

Summary: The high overpotential required for the oxygen evolution reaction (OER) poses a significant obstacle for producing renewable fuels and chemicals. While ruthenium dioxide is a highly active catalyst for OER in acid, accurately measuring its activity at low overpotentials can be challenging due to high capacitance. In this study, electrochemistry-mass spectrometry was used to measure the OER activity of a series of ruthenium-based catalysts in acidic electrolytes, revealing a previously unobserved Tafel slope and demonstrating the influence of detection method sensitivity on well-known quantities such as onset potential and exchange current density.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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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

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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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, Physical

Alloy-strain-output induced lattice dislocation in Ni3FeN/Ni3Fe ultrathin nanosheets for highly efficient overall water splitting

Zijian Li et al.

Summary: The study develops Ni3FeN/Ni3Fe electrocatalysts through lattice defect engineering, showing excellent performance for the OER and HER in alkaline media. This approach provides a new strategy for high-performance water splitting.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Multidisciplinary

Boosting Oxygen Evolution Reaction by Creating Both Metal Ion and Lattice-Oxygen Active Sites in a Complex Oxide

Yinlong Zhu et al.

ADVANCED MATERIALS (2020)

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Article Chemistry, Physical

Mn-Doped RuO2 Nanocrystals as Highly Active Electrocatalysts for Enhanced Oxygen Evolution in Acidic Media

Shi Chen et al.

ACS CATALYSIS (2020)

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Article Chemistry, Physical

Role of Defects in the Interplay between Adsorbate Evolving and Lattice Oxygen Mechanisms of the Oxygen Evolution Reaction in RuO2 and IrO2

Alexandra Zagalskaya et al.

ACS CATALYSIS (2020)

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Article Chemistry, Physical

Strong Electronic Coupling between Ultrafine Iridium-Ruthenium Nanoclusters and Conductive, Acid-Stable Tellurium Nanoparticle Support for Efficient and Durable Oxygen Evolution in Acidic and Neutral Media

Junyuan Xu et al.

ACS CATALYSIS (2020)

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Article Multidisciplinary Sciences

A Co-Doped Nanorod-like RuO2 Electrocatalyst with Abundant Oxygen Vacancies for Acidic Water Oxidation

Yuanyuan Tian et al.

ISCIENCE (2020)

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Article Multidisciplinary Sciences

Exceptionally active iridium evolved from a pseudo-cubic perovskite for oxygen evolution in acid

Yubo Chen et al.

NATURE COMMUNICATIONS (2019)

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Article Chemistry, Physical

Ruthenium Oxide Nanosheets for Enhanced Oxygen Evolution Catalysis in Acidic Medium

Sourav Laha et al.

ADVANCED ENERGY MATERIALS (2019)

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Article Chemistry, Physical

Ultrafine Defective RuO2 Electrocatayst Integrated on Carbon Cloth for Robust Water Oxidation in Acidic Media

Ruixiang Ge et al.

ADVANCED ENERGY MATERIALS (2019)

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Article Multidisciplinary Sciences

Chromium-ruthenium oxide solid solution electrocatalyst for highly efficient oxygen evolution reaction in acidic media

Yichao Lin et al.

NATURE COMMUNICATIONS (2019)

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Article Chemistry, Multidisciplinary

Charge-Redistribution-Enhanced Nanocrystalline Ru@IrOx Electrocatalysts for Oxygen Evolution in Acidic Media

Jieqiong Shan et al.

CHEM (2019)

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Article Chemistry, Multidisciplinary

Assembling Ultrasmall Copper-Doped Ruthenium Oxide Nanocrystals into Hollow Porous Polyhedra: Highly Robust Electrocatalysts for Oxygen Evolution in Acidic Media

Jianwei Su et al.

ADVANCED MATERIALS (2018)

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Article Chemistry, Multidisciplinary

Activating lattice oxygen redox reactions in metal oxides to catalyse oxygen evolution

Alexis Grimaud et al.

NATURE CHEMISTRY (2017)

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Review Multidisciplinary Sciences

Combining theory and experiment in electrocatalysis: Insights into materials design

Zhi Wei Seh et al.

SCIENCE (2017)

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Ruthenium-cobalt nanoalloys encapsulated in nitrogen-doped graphene as active electrocatalysts for producing hydrogen in alkaline media

Jianwei Su et al.

NATURE COMMUNICATIONS (2017)

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Article Chemistry, Physical

Orientation-Dependent Oxygen Evolution on RuO2 without Lattice Exchange

Kelsey A. Stoerzinger et al.

ACS ENERGY LETTERS (2017)

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Highly Active and Stable Catalysts of Phytic Acid-Derivative Transition Metal Phosphides for Full Water Splitting

Gong Zhang et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2016)

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New Insights into Corrosion of Ruthenium and Ruthenium Oxide Nanoparticles in Acidic Media

Nejc Hodnik et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2015)

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Oxygen Vacancies Confined in Ultrathin Indium Oxide Porous Sheets for Promoted Visible-Light Water Splitting

Fengcai Lei et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2014)

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Part-A: Synthesis of polyaniline and carboxylic acid functionalized SWCNT composites for electromagnetic interference shielding coatings

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POLYMER (2014)

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CP2K: atomistic simulations of condensed matter systems

Juerg Hutter et al.

WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE (2014)

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A comprehensive review on PEM water electrolysis

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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2013)

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Mechanism and Tafel Lines of Electro-Oxidation of Water to Oxygen on RuO2(110)

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Ultrathin Carbon Coating and Defect Engineering Promote RuO2 as an Efficient Catalyst for Acidic Oxygen Evolution Reaction with Super-High Durability

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