The Improved Covalent Coupling Induced by Bi Cations in CoBiSe_x Nanosheet Arrays for Stable Water Electrolysis

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

Published: March 25, 2025

Transition metal selenides (TMSes) with high electrical conductivity, easily regulated morphological structure, and unique electronic structure have been explored as promising electrocatalysts for electrolytic water, while the lower intrinsic electrocatalytic capability has limited their wide application. Herein, we obtained CoSe nanosheet arrays Bi cations incorporation (CoBiSex arrays) driven by spinel oxides. Compared oxides, low electronegativity of Se in CoBiSex leads to a portion Co2+ spin states (t2g6eg1) due covalent interaction between Co Se, which can facilitate charge transfer. Density functional theory (DFT) calculation results further identify redistribution electron density from Co, intensifying adsorption OOH* during water process 140 h robust catalytic performance. This work offers strategy exploring TMSe materials potential applications process.

Language: Английский

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Operational Stability Factor: A Comprehensive Metric for Assessing Catalyst Durability in Dynamic Water Electrolyzer Conditions

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2574 - 2581

Published: May 2, 2025

Language: Английский

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Deciphering Catalyst–Support Interaction via Doping for Highly Active and Durable Oxygen Evolution Catalysis

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

The design of oxygen evolution reaction (OER) electrocatalysts demands a delicate balance between activity and stability. In this study, we present rational approach that leverages catalyst-support interactions to enhance both the intrinsic durability Ir-based catalysts. Our study reveals while Mo doping energetically promotes formation high-valent Ir species, enhancing catalytic activity, it also leads reduction in electrical conductivity. These findings emphasize supporting can introduce beneficial limiting effects, highlighting need for carefully balanced strategy optimize overall OER performance. Simultaneously, situ analytical techniques comparative evaluation reveal crucial role oxide supports stabilizing catalyst. highlight pivotal interface engineering maintaining catalyst integrity support materials dopant-driven electronic promotion with structural electrochemical robustness. interconnected degradation pathways move beyond catalyst-centric view instead adopt system-level understanding offers strong foundation high-performance energy applications.

Language: Английский

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Surface Reconstruction in Precious and Non‐Precious Metal‐Based Electrocatalysts for Oxygen Evolution Reaction: A pH‐Dependent Perspective

Advanced Sustainable Systems, Journal Year: 2025, Volume and Issue: unknown

Published: May 4, 2025

Abstract Extracting hydrogen by electrochemical water splitting is the most important pathway for green production at present whereas corresponding anodic oxygen evolution reaction (OER) catalysts usually suffer from harsh high‐potential conditions, either acidic or alkaline, leading to performance degradation and surface reconstruction. Importantly, reconstruction upon some may lead a misinterpretation of true active centers, thereby impeding rational design catalysts. Consequently, understanding dynamic catalyst during OER essential. This paper reviews recent research progress on both precious‐metal non‐precious‐metal across wide pH, i.e., under alkaline highlights differences between them. In addition, an analysis underlying causes impact factors that greatly influence these processes are presented. Finally, based discussions, perspectives proposed.

Language: Английский

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