In-situ surface-derivation of Ni-Mo bimetal sulfides nanosheets on Co 3 O 4 nanoarrays as an advanced overall water splitting electrocatalyst in alkaline solution

Ting Xiong, Guofang Li, David J. Young, Ziyu Tan, Xian Hong Yin, Yan Mi, Feilong Hu

Research output: Contribution to journalArticle

Abstract

Developing high-performance overall water-splitting electrocatalysts working under alkaline condition is highly desirable but many challenges remain. Herein, the in-situ surface-derivation of Ni-Mo bimetal sulfides nanosheets on Co 3 O 4 nanoarrays, which supported on carbon fibers (Ni-Mo-S@Co 3 O 4 /CF) was designed and constructed. The as-prepared hybrid catalyst exhibits excellent electrocatalytic performance for both OER and HER under alkaline conditions, with only a small overpotential of 275 mV and 85 mV at a current density of 10 mA cm −2 , respectively. Furthermore, the hybrid catalysts assembled full electrolyzer achieved a current density of 10 mA cm −2 at 1.57 V in an alkaline condition, without decay even after a durability test of 50 h. These results demonstrate that in-situ surface-derivation is a promising strategy for the design of efficient overall water splitting catalysts.

Original languageEnglish
Pages (from-to)328-335
Number of pages8
JournalJournal of Alloys and Compounds
Volume791
Early online date26 Mar 2019
DOIs
Publication statusPublished - 30 Jun 2019

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