Synergetic modulation of the electronic structure and hydrophilicity of nickel–iron hydroxide for efficient oxygen evolution by UV/ozone treatment
Synergetic modulation of the electronic structure and hydrophilicity of nickel–iron hydroxide for efficient oxygen evolution by UV/ozone treatment
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紫外/臭氧处理对氢氧化镍铁电子结构和亲水性的协同调节
DOI：
10.1039/d0ta03470c
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发表时间：
2020-07
影响因子：
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通讯作者：
Ying-Hsi Pan;Yanfang Wu;H. Hsain;R. Su;C. Cazorla;Dewei Chu
中科院分区：
文献类型：
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作者：
Ying-Hsi Pan;Yanfang Wu;H. Hsain;R. Su;C. Cazorla;Dewei Chu
本研究开发了一种新的表面工程技术，通过UV/臭氧处理来改善氢氧化镍-铁基催化剂的析氧反应性能。结果表明，UV/O3处理可以显著改善催化剂的亲水性，改变Ni-Fe中心的电子结构，使Ni 2+氧化为Ni 3+，从而使电极与电解质的接触更好，电荷转移更强，活性中心数量更多，具有更高的本征活性。这项工作表明，紫外线/臭氧处理作为一个非常有效的策略，通过利用表面改性的高性能电催化剂的合理设计。
In this work, a new surface engineering technique through UV/ozone treatment to improve the oxygen evolution reaction performance of nickel-iron hydroxide based catalysts has been developed. It is found that UV/ozone treatment can significantly improve the hydrophilicity of the catalysts as well as modify the electronic structure at the Ni–Fe center and oxidize Ni2+ to Ni3+, which consequently enables better electrode–electrolyte contacts, stronger charge-transfer and more numbers of active sites with higher intrinsic activity during the OER. This work demonstrates UV/ozone treatment as a highly effective strategy towards the rational design of high-performance electrocatalysts by exploiting surface modifications.