Pristine WSe 2 based electrocatalyst shows poor reaction kinetics in electrochemical hydrogen evolution reaction due to a lack of active atomic sites and an inert basal plane. Herein, we report an active system of non-metallic plasmonic WSe 2 /WO 3Àx , supported by highly conductive and eco-friendly Ag/cellulose paper electrodes. An air thermal annealing technique is used to enrich the p-WO 3Àx dopants in WSe 2 , which is significant for substantially improving electrocatalytic behaviour as well as photo responsive performance in the near-infrared (NIR) region. The WSe 2 /WO 3Àx dramatically decreases the overpotential of HER from À330 to À150 mV (at 10 mA/cm 2 ) owing to homo doping and generation of Se-vacancies. Surface plasmons resonances of p-WO 3Àx give the contributions to injection of photogenerated electrons and overpotential as low as À120 mV can be achieved under the illumination of NIR light. These results represent significant advances in light-enhanced electrocatalysis and would provide potential applications for commercial hydrogen generation.Novelty Statement: Novel WSe 2 /WO 3ÀX hybrid nanosheets-based electrocatalysts exhibit the light-enhanced hydrogen evolution reaction. WO 3ÀX enriched WSe 2 nanosheets exhibit rapid electrochemical charge transport due to p-homodoping and Se-vacancies. Overall, the 3D-porous structure of cellulose paper and 2D-WSe 2 /WO 3ÀX leads the promising optimisation.
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