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

Haslinda Binti Mohd Sidek; Jihyeong Lee; Xiaoyan Jin; Seong Ju Hwang

doi:10.1002/bkcs.12790

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

Haslinda Binti Mohd Sidek, Jihyeong Lee, Xiaoyan Jin, Seong Ju Hwang

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

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.

Original language	English
Pages (from-to)	962-968
Number of pages	7
Journal	Bulletin of the Korean Chemical Society
Volume	44
Issue number	12
DOIs	https://doi.org/10.1002/bkcs.12790
State	Published - Dec 2023

Keywords

bond control
electrocatalyst
nanostructures
oxygen evolution reaction
surface modification

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10.1002/bkcs.12790

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title = "Optimization of oxygen evolution electrocatalytic activity of metal oxide nanosheet via surface modification",

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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author = "Sidek, {Haslinda Binti Mohd} and Jihyeong Lee and Xiaoyan Jin and Hwang, {Seong Ju}",

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T1 - Optimization of oxygen evolution electrocatalytic activity of metal oxide nanosheet via surface modification

AU - Sidek, Haslinda Binti Mohd

AU - Lee, Jihyeong

AU - Jin, Xiaoyan

AU - Hwang, Seong Ju

PY - 2023/12

Y1 - 2023/12

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AB - 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.

KW - bond control

KW - electrocatalyst

KW - nanostructures

KW - oxygen evolution reaction

KW - surface modification

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JF - Bulletin of the Korean Chemical Society

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

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Keywords

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