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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-WSe2/MWNT) heterostructure for the first time, wherein the MWNTs act as an efficient topological template for the nucleation and growth of curved Co-WSe2 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-WSe2, 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.

journal of materials chemistry a

Carbon nanotube-induced phase and stability engineering: a strained cobalt-doped WSe<sub>2</sub>/MWNT heterostructure for enhanced hydrogen evolution reaction

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

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