Issue 10, 2019

The fabrication of Co:ZnS/CoS2 heterostructure nanowires with a superior hydrogen evolution performance

Abstract

The development of highly active, low-cost and earth-abundant non-noble transition metal electrocatalysts for the hydrogen evolution reaction (HER) is a significant challenge in the sustainable energy field. Herein, we reported ultrafine Co:ZnS/CoS2 heterostructure nanowires (NWs) prepared by the one-step hydrothermal method for high-efficiency HER. The Co:ZnS/CoS2 heterostructure nanowires presented superior HER activity with an overpotential (η) of 78 mV at the current density of 10 mA cm−2 and a Tafel slope of only 56 mV dec−1, which was smaller than that obtained in previous reports for similar materials. Furthermore, the overpotential increased only by 5 mV after 1000 cycles, and the structural change was not obvious. Our theoretical and experimental results indicated that the formation of the Co:ZnS/CoS2 heterostructure showed excellent charge transport kinetics, thus significantly improving its HER performance. Such ultrafine Co:ZnS/CoS2 heterostructure nanowires may be a promising substitute to noble metal electrocatalysts for water splitting.

Graphical abstract: The fabrication of Co:ZnS/CoS2 heterostructure nanowires with a superior hydrogen evolution performance

Supplementary files

Article information

Article type
Paper
Submitted
25 Jun 2019
Accepted
29 Jul 2019
First published
30 Jul 2019

Sustainable Energy Fuels, 2019,3, 2771-2778

The fabrication of Co:ZnS/CoS2 heterostructure nanowires with a superior hydrogen evolution performance

S. Yan, K. Wang, Q. Wu, F. Zhou, Z. Lin, H. Song and Y. Shi, Sustainable Energy Fuels, 2019, 3, 2771 DOI: 10.1039/C9SE00398C

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