Activating Inert ZnO by Surface Cobalt Doping for Efficient Water Oxidation in Neutral Media

Chao Meng, Yuan Feng Gao, Xue Min Chen, Yu Xia Li, Meng Chang Lin, Yue Zhou

研究成果: 雜誌貢獻文章同行評審

12 引文 斯高帕斯(Scopus)

摘要

Precisely modulating the electronic structure of catalytic sites represents a promising strategy to design highly efficient electrocatalysts toward oxygen evolution reaction (OER). Here, the non-noble metal Co is successfully doped into the surface layer of ZnO and the doping concentration can be controllably adjusted by a partial cation exchange method. Our experimental and theoretical results demonstrate that the surface-doped Co can not only activate the inherently inert Zn sites by modifying their electronic structure and thereby promoting the OH∗ adsorption but also serve as active sites themselves for the adsorption of O∗ and OOH*, ultimately realizing the bimetallic synergetic effect in Co/ZnO for OER catalysis. Besides, the surface Co doping also benefits the obvious enhancement of electrical conductivity of the ZnO host. Therefore, relative to the inactive ZnO, the as-prepared Co/ZnO exhibits a much smaller overpotential and Tafel slope toward OER. This strategy provides a rational design of low-cost and efficient OER electrocatalysts.
原文英語
頁(從 - 到)18055-18060
頁數6
期刊ACS Sustainable Chemistry and Engineering
7
發行號21
DOIs
出版狀態已發佈 - 11月 4 2019
對外發佈

ASJC Scopus subject areas

  • 化學 (全部)
  • 環境化學
  • 化學工程 (全部)
  • 可再生能源、永續發展與環境

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