期刊

Dalton Transactions

标题

Phase-controllable synthesis of cobalt hydroxide for electrocatalytic oxygen evolution

作者

Fenglei Lyu, Yaocai Bai, Qingfa Wang, Li Wang, Xiangwen Zhang, Yadong Yin

摘要

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)2 with both Co2+Td and Co2+Oh sites and β-Co(OH)2 with Co2+Oh sites. Electrochemical characterization reveals that α-Co(OH)2 is more active than β-Co(OH)2 towards OER. The better activity can be attributed to the presence of Co2+Td sites in α-Co(OH)2, which are more active than Co2+Oh sites. Our finding clarifies the contribution of the two catalytic sites and helps future rational design of high-performance OER electrocatalysts.

原文链接

http://pubs.rsc.org/en/content/articlelanding/2017/dt/c7dt01110e#!divAbstract