Issue 15, 2022

Feather-like few-layer WSe2 nanosheets grown on W substrates: an excellent electrocatalyst for the hydrogen evolution reaction

Abstract

Thin films of few-layer WS2 nanosheets and WSe2 nanosheets were directly grown on W substrates via a scalable infrared-heating CVD method. The WSe2 nanosheets are in a unique feather-like assembly, and mainly composed of the 2H phase, while the presence of a metallic 1T phase was confirmed through atomic resolution TEM observation. Feather-like WSe2 nanosheets delivered excellent electrocatalytic performances for the HER in acid, including a low overpotential of 141 mV to yield a current at 10 mA cm−2, and superb long-term stability at high currents. The highly efficient electrocatalysis is mainly attributed to the unique feather-like morphology of the WSe2 nanosheets with numerous sharp barbules to help maximize the exposed edge sites, along with other beneficial factors including the presence of a 1T phase and slight O-doping.

Graphical abstract: Feather-like few-layer WSe2 nanosheets grown on W substrates: an excellent electrocatalyst for the hydrogen evolution reaction

Article information

Article type
Communication
Submitted
20 Maijs 2022
Accepted
23 Jūn. 2022
First published
24 Jūn. 2022
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2022,4, 3142-3148

Feather-like few-layer WSe2 nanosheets grown on W substrates: an excellent electrocatalyst for the hydrogen evolution reaction

Y. Li, L. Zhang, J. Xiao and W. Zhang, Nanoscale Adv., 2022, 4, 3142 DOI: 10.1039/D2NA00321J

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