Issue 7, 2017

MOF-derived RuO2/Co3O4 heterojunctions as highly efficient bifunctional electrocatalysts for HER and OER in alkaline solutions

Abstract

The oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are key half reactions involved in electrochemical water splitting. The design of active and robust Co3O4-based electrocatalysts for overall water splitting in basic media is highly desirable but still remains a great challenge. Herein, a catalyst of a combined metal oxide heterojunction (RuO2/Co3O4) was synthesized by directly annealing a MOF-derived Co–Ru complex under an air atmosphere. The catalyst shows a low OER and HER overpotential of only 305 mV and 89 mV at 10 mA cm−2 in 1 M KOH solution, respectively. It contains only a small amount of precious metal oxides, however, and demonstrates a better performance than most of the other Co3O4-based electrocatalysts reported at the present stage.

Graphical abstract: MOF-derived RuO2/Co3O4 heterojunctions as highly efficient bifunctional electrocatalysts for HER and OER in alkaline solutions

Supplementary files

Article information

Article type
Paper
Submitted
25 Okt. 2016
Accepted
05 Dec. 2016
First published
13 Janv. 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 3686-3694

MOF-derived RuO2/Co3O4 heterojunctions as highly efficient bifunctional electrocatalysts for HER and OER in alkaline solutions

H. Liu, G. Xia, R. Zhang, P. Jiang, J. Chen and Q. Chen, RSC Adv., 2017, 7, 3686 DOI: 10.1039/C6RA25810G

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