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Corresponding Author

Wei ZHANG(zw@snnu.edu.cn);
Rui CAO(ruicao@ruc.edu.cn)

Abstract

Electrocatalytic water splitting is considered as a promising technology for renewable energy. The development of efficient, stable, cost-effective, and bifunctional catalysts for both water reduction and oxidation has continued to face significant challenges. Herein, we report a robust and highly active nickel selenide (NiSe) spheres grown on carbon cloth (CC) by electrodeposition from a nickel selenite complex which is a single source containing both Ni and Se. A combination of two chemicals containing, separately, Ni and Se is used in traditional preparations of metal selenides, causing possible problems in the uniformity of the products. The as-prepared NiSe-EA/CC electrode exhibited electrocatalytic activities toward both water reduction and oxidation, with overpotentials of 154 mV at 10 mA·cm-2 and 250 mV at 20 mA·cm-2, respectively. A water electrolysis cell could realize a current density of 10 mA·cm-2 at a cell voltage of 1.53 V with excellent stability, when using NiSe-EA/CC electrode as both the anode and the cathode.

Graphical Abstract

Keywords

electrocatalysis, nickel selenide, water splitting, hydrogen evolution reaction, oxygen evolution reaction

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Date

2019-10-28

Online Available Date

2019-10-28

Revised Date

2019-09-29

Received Date

2019-05-07

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