Phase-controllable synthesis of cobalt hydroxide for electrocatalytic oxygen evolution

Dalton Transactions : an International Journal of Inorganic Chemistry
Fenglei LyuYadong Yin

Abstract

Identification of active sites for oxygen evolution reaction (OER) plays a key role in the design and fabrication of high-performance cobalt-based electrocatalysts. Herein, we report the synthesis of two types of two-dimensional monometallic cobalt hydroxide nanoplates in aqueous solution for OER: α-Co(OH)2with both Co2+Tdand Co2+Ohsites and β-Co(OH)2with Co2+Ohsites. Electrochemical characterization reveals that α-Co(OH)2is more active than β-Co(OH)2towards OER. The better activity can be attributed to the presence of Co2+Tdsites in α-Co(OH)2, which are more active than Co2+Ohsites. Our finding clarifies the contribution of the two catalytic sites and helps future rational design of high-performance OER electrocatalysts.

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Citations

Nov 17, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Hua-Tian ShiWei-Bin Yu
Oct 23, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Ievgen V OdynetsN I Klyui
Nov 21, 2018·Small·Fenglei LyuYadong Yin
Jun 11, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Xiaoqiang DuXiaoshuang Zhang
Jul 23, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Qingqing ZhaYonghong Ni
Nov 17, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Umair ShamraizBareera Raza
Aug 14, 2018·Journal of Colloid and Interface Science·Shital B KaleChandrakant D Lokhande
Feb 11, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Umair ShamraizBareera Raza

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