Title

Carbon nanotube-induced phase and stability engineering: A strained cobalt-doped WSe2/MWNT heterostructure for enhanced hydrogen evolution reaction

RIS ID

124491

Publication Details

Zhang, G., Zheng, X., Xu, Q., Zhang, J., Liu, W. & Chen, J. (2018). Carbon nanotube-induced phase and stability engineering: A strained cobalt-doped WSe2/MWNT heterostructure for enhanced hydrogen evolution reaction. Journal of Materials Chemistry A, 6 (11), 4793-4800.

Abstract

Efficient evolution of hydrogen with inexpensive, highly active and long-term stable catalysts in a wide pH range holds tremendous promise for clean energy. Here, we report the synthesis of a cobalt-doped tungsten selenide/multiwalled carbon nanotube (Co-WSe 2 /MWNT) heterostructure for the first time, wherein the MWNTs act as an efficient topological template for the nucleation and growth of curved Co-WSe 2 nanosheets with abundant accessible active sites. Furthermore, we demonstrate that the MWNT induced curvature strain not only promotes the predominant 1T phase of active Co-WSe 2 , but also enhances its anti-oxidative stability. Further study indicates that the as-prepared catalyst exhibits efficient electrocatalytic HER in both acidic and alkaline environments with high activity and long-term stability.

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Link to publisher version (DOI)

http://dx.doi.org/10.1039/c8ta00163d