In situ spectroscopic identification of μ-OO bridging on spinel Co3O4 water oxidation electrocatalyst

Hsin Yi Wang, Sung Fu Hung, Ying Ya Hsu, Lulu Zhang, Jianwei Miao, Ting Shan Chan, Qihua Xiong, Bin Liu*

*此作品的通信作者

研究成果: Article同行評審

105 引文 斯高帕斯(Scopus)

摘要

The formation of μ-OO peroxide (Co-OO-Co) moieties on spinel Co3O4 electrocatalyst prior to the rise of the electrochemical oxygen evolution reaction (OER) current was identified by in situ spectroscopic methods. Through a combination of independent in situ X-ray absorption, grazing-angle X-ray diffraction, and Raman analysis, we observed a clear coincidence between the formation of μ-OO peroxide moieties and the rise of the anodic peak during OER. This finding implies that a chemical reaction step could be generally ignored before the onset of OER current. More importantly, the tetrahedral Co2+ ions in the spinel Co3O4 could be the vital species to initiate the formation of the μ-OO peroxide moieties.

原文English
頁(從 - 到)4847-4853
頁數7
期刊Journal of Physical Chemistry Letters
7
發行號23
DOIs
出版狀態Published - 1 12月 2016

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