Optimization of oxygen evolution electrocatalytic activity of metal oxide nanosheet via surface modification

IF 1.7 4区 化学 Bulletin of the Korean Chemical Society Pub Date : 2023-10-24 DOI:10.1002/bkcs.12790
Haslinda Binti Mohd Sidek, Jihyeong Lee, Xiaoyan Jin, Seong-Ju Hwang
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Abstract

A surface modification route to high-performance oxygen evolution electrocatalysts was developed by immobilization of highly-oxidized SeO42− species on the surface of exfoliated MnO2 nanosheets. The enhanced stability of tetragonally-distorted MnO6 octahedron could be achieved by the weakening of axial Mn–O bond due to competition with highly covalent Se6+–O bonds. The selenate anchoring was found to be quite effective in improving the electrocatalyst functionality of MnO2 nanosheets for oxygen evolution reaction, which could be ascribed to the improvement of charge transfer kinetics and the enhancement of Mn3+ stability. This study emphasized that the fine-control of bonding nature via surface modification with selenate anchoring can offer useful means to explore efficient electrocatalysts.

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通过表面改性优化金属氧化物纳米片的氧进化电催化活性
通过在剥离的 MnO2 纳米片表面固定高度氧化的 SeO42- 物种,开发了一种高性能氧进化电催化剂的表面改性途径。由于与高共价的 Se6+-O 键竞争,轴向 Mn-O 键被削弱,从而增强了四方扭曲 MnO6 八面体的稳定性。研究发现,硒酸盐锚定能有效改善 MnO2 纳米片在氧进化反应中的电催化剂功能,这可能归因于电荷转移动力学的改善和 Mn3+ 稳定性的提高。这项研究强调,通过硒酸盐锚定进行表面改性来精细控制键合性质,可为探索高效电催化剂提供有用的手段。
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来源期刊
Bulletin of the Korean Chemical Society
Bulletin of the Korean Chemical Society Chemistry-General Chemistry
自引率
23.50%
发文量
182
期刊介绍: The Bulletin of the Korean Chemical Society is an official research journal of the Korean Chemical Society. It was founded in 1980 and reaches out to the chemical community worldwide. It is strictly peer-reviewed and welcomes Accounts, Communications, Articles, and Notes written in English. The scope of the journal covers all major areas of chemistry: analytical chemistry, electrochemistry, industrial chemistry, inorganic chemistry, life-science chemistry, macromolecular chemistry, organic synthesis, non-synthetic organic chemistry, physical chemistry, and materials chemistry.
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