Challenges and recent progress in unraveling the intrinsic pH effect in electrocatalysis

被引：27

作者：

Chen, Wei ^{[1
]}

Zhang, Meng-Ke ^{[1
]}

Liu, Bing-Yu ^{[1
]}

Cai, Jun ^{[1
]}

Chen, Yan-Xia ^{[1
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Dept Chem Phys, Hefei 230026, Peoples R China

来源：

CURRENT OPINION IN ELECTROCHEMISTRY | 2022年 / 34卷

基金：

中国国家自然科学基金;

关键词：

pH effect; Interfacial pH change; Medium pH; Intrinsic reaction kinetics; Formic acid/formate oxidation; FORMIC-ACID OXIDATION; HYDROGEN EVOLUTION REACTION; ELECTROCHEMICAL PROTON-TRANSFER; ELECTRON-TRANSFER-REACTIONS; GALVANOSTATIC ELECTROOXIDATION; POTENTIAL OSCILLATIONS; INFRARED-SPECTROSCOPY; ANION ADSORPTION; CO2; REDUCTION; PLATINUM;

D O I：

10.1016/j.coelec.2022.101003

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The kinetics of many electrode reactions, especially those involving the consumption/production of H+/OH-, show significant pH dependence. Systematic studies of the pH effect over a wide pH range can provide very useful information about their reaction mechanism(s) and help figure out the optimum reaction conditions. For fast electrode reactions in solutions of medium pH and low buffer capacity, correcting the effects induced from the shift of local pH near the electrode-electrolyte interface (pH(s)) is a prerequisite for unraveling the intrinsic kinetics and its pH dependence. In this review, recent progress on how to estimate the pHs, how to eliminate the effect induced by pHs shift and how to deduce the pH dependent intrinsic reaction kinetics are summarized. Mechanistic and kinetic implication of pH effect on electrocatalytic processes will be discussed by taking formic acid/formate oxidation at Pt electrode as an example.

引用

页数：12

共 106 条

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