Progress on the mechanisms of Ru-based electrocatalysts for the oxygen evolution reaction in acidic media

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 85, P. 220 - 238

Published: June 20, 2023

Language: Английский

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Current Status and Perspectives of Dual-Atom Catalysts Towards Sustainable Energy Utilization

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: Feb. 29, 2024

Abstract The exploration of sustainable energy utilization requires the implementation advanced electrochemical devices for efficient conversion and storage, which are enabled by usage cost-effective, high-performance electrocatalysts. Currently, heterogeneous atomically dispersed catalysts considered as potential candidates a wide range applications. Compared to conventional catalysts, metal atoms in carbon-based have more unsaturated coordination sites, quantum size effect, strong metal–support interactions, resulting exceptional catalytic activity. Of these, dual-atomic (DACs) attracted extensive attention due additional synergistic effect between two adjacent atoms. DACs advantages full active site exposure, high selectivity, theoretical 100% atom utilization, ability break scaling relationship adsorption free on sites. In this review, we summarize recent research advancement DACs, includes (1) comprehensive understanding synergy atomic pairs; (2) synthesis DACs; (3) characterization methods, especially aberration-corrected scanning transmission electron microscopy synchrotron spectroscopy; (4) energy-related last part focuses great catalysis small molecules, such oxygen reduction reaction, CO 2 hydrogen evolution N reaction. future challenges opportunities also raised prospective section.

Language: Английский

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Heterostructured electrocatalysts for the oxygen evolution reaction

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(30), P. 18832 - 18865

Published: Jan. 1, 2024

This review focuses mainly on the overall facilitating effect of heterostructures OER process. The fabrication heterostructured electrocatalysts and relationship between their structures electrocatalytic properties are discussed.

Language: Английский

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Deactivation mechanism for water splitting: Recent advances

Carbon Energy, Journal Year: 2024, Volume and Issue: 6(7)

Published: April 17, 2024

Abstract Hydrogen (H 2 ) has been regarded as a promising alternative to fossil‐fuel energy. Green H produced via water electrolysis (WE) powered by renewable energy could achieve zero‐carbon footprint. Considerable attention focused on developing highly active catalysts facilitate the reaction kinetics and improve efficiency of WE. However, stability electrocatalysts hampers commercial viability Few studies have elucidated origin catalyst degradation. In this review, we first discuss WE mechanism, including anodic oxygen evolution (OER) cathodic hydrogen (HER). Then, provide strategies used enhance electrocatalysts. After that, deactivation mechanisms typical commercialized HER OER catalysts, Pt, Ni, RuO , IrO are summarized. Finally, influence fluctuating degradation is highlighted in situ characterization methodologies for understanding dynamic processes described.

Language: Английский

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Advancing electrocatalytic reactions through mapping key intermediates to active sites via descriptors

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(14), P. 7392 - 7425

Published: Jan. 1, 2024

Descriptors play a crucial role in electrocatalysis as they can provide valuable insights into the electrochemical performance of energy conversion and storage processes. They allow for understanding different catalytic activities enable prediction better catalysts without relying on time-consuming trial-and-error approaches. Hence, this comprehensive review focuses highlighting significant advancements commonly used descriptors critical electrocatalytic reactions. First, fundamental reaction processes key intermediates involved several reactions are summarized. Subsequently, three types classified introduced based catalysts. These include d-band center descriptors, readily accessible intrinsic property spin-related all which contribute to profound behavior. Furthermore, multi-type that collectively determine also Finally, we discuss future envisioning their potential integrate multiple factors, broaden application scopes, synergize with artificial intelligence more efficient catalyst design discovery.

Language: Английский

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Rational Design of Cost-Effective Metal-Doped ZrO2 for Oxygen Evolution Reaction

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: April 25, 2024

The design of cost-effective electrocatalysts is an open challenging for oxygen evolution reaction (OER) due to the "stable-or-active" dilemma. Zirconium dioxide (ZrO

Language: Английский

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Exploring Structural Evolution Behaviors of Ligand‐Defect‐Rich Ferrocene‐Based Metal‐Organic Frameworks for Electrochemical Oxygen Evolution via Operando X‐Ray Absorption Spectroscopy

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 25, 2024

Abstract Metal‐organic frameworks (MOFs) have exhibited encouraging catalytic activity for the oxygen evolution reaction (OER), a crucial process water electrolysis to produce green hydrogen. Nonetheless, distinguishing source of and establishing structure‐composition‐property relationships MOFs during OER processes remain challenging. Here, first time, operando X‐ray absorption spectroscopy (XAS) is utilized monitor structural identify active components ferrocene‐based (Ni‐Fc) OER. Ligand‐defect‐rich Ni‐Fc synthesized via co‐deposition method. After electrochemical activation, exhibits superior electrocatalytic (228 mV at 10 mA cm −2 in 0.1 m KOH), which highly competitive compared with state‐of‐the‐art electrocatalysts. Operando XAS analysis ex‐situ characterizations reveal reconstruction into amorphous NiFe‐catalysts (a‐NiFe) activation process, further real phases (a‐NiFe‐C) under potential greater than 1.45 V (vs RHE). In phases, in‐situ formed deprotonated oxygen‐defected Ni oxyhydroxide analogues act as sites, while Fe hydroxide derived from ligands optimize electronic structure sites improving activity. Density functional theory (DFT) indicates reduced energy barrier a‐NiFe‐C pristine MOFs, supporting improved latter.

Language: Английский

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Dual Doping in Precious Metal Oxides: Accelerating Acidic Oxygen Evolution Reaction

International Journal of Molecular Sciences, Journal Year: 2025, Volume and Issue: 26(4), P. 1582 - 1582

Published: Feb. 13, 2025

Developing a highly active and stable catalyst for acidic oxygen evolution reactions (OERs), the key half-reaction proton exchange membrane water electrolysis, has been one of most cutting-edge topics in electrocatalysis. A dual-doping strategy optimizes electronic environment, modifies coordination generates vacancies, introduces strain effects through synergistic effect two elements to achieve high catalytic performance. In this review, we summarize progress dual doping RuO2 or IrO2 OERs. The three main mechanisms OERs are dicussed firstly, followed by detailed examination development history catalysts, from experimentally driven systems machine learning (ML) theoretical screening systems. Lastly, provide summary remaining challenges future prospects, offering valuable insights into

Language: Английский

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Oxidation of interfacial cobalt controls the pH dependence of the oxygen evolution reaction

Nature Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Transition metal oxides often undergo dynamic surface reconstruction under oxygen evolution reaction conditions to form the active state, which differs in response electrolyte pH. The resulting pH dependency of catalytic activity is commonly observed but poorly understood. Herein we track Co oxidation state changes at different pH-directed (hydr)oxide/electrolyte interfaces using operando X-ray absorption spectroscopy characterizations. Combined with situ electrochemical analyses, establish correlations between redox dynamics, flat band potential and explain activity. Alkaline environments provide a low that yields low-potential transformation, favours reconstruction. Neutral acidic afford an anodic shift transformation increases overpotential. larger overpotential neutral attributable poor atom polarizability slow changes. These findings reveal interfacial directly determine

Language: Английский

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Self-Supporting Metal-Organic Framework-Based Nanoarrays for Electrocatalysis

ACS Nano, Journal Year: 2022, Volume and Issue: 16(12), P. 19913 - 19939

Published: Nov. 18, 2022

The replacement of powdery catalysts with self-supporting alternatives for catalyzing various electrochemical reactions is extremely important the large-scale commercial application renewable energy storage and conversion technologies. Metal-organic framework (MOF)-based nanoarrays possess tunable compositions, well-defined structure, abundant active sites, effective mass electron transport, etc., which enable them to exhibit superior electrocatalytic performance in multiple reactions. This review presents latest research progress developing MOF-based electrocatalysis. We first highlight structural features advantages nanoarrays, followed by a detailed summary design synthesis strategies then describe recent their Finally, challenges perspectives are discussed, where further exploration into will facilitate development

Language: Английский

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