Phosphorus-doping and addition of V_2O_5 into Pt/graphene resulting in highly-enhanced electro-photo synergistic catalysis for oxygen reduction and hydrogen evolution reactions

摘要

Both the introduction of photo-responsive metal oxide and the heteroatoms-doping into Pt-based catalysts may be a promising strategy to enhance its catalytic properties. In this paper, one-pot solid phase synthesis was employed to synthesize Pt (P)-V2O5/CNs catalyst, and it is shown that the addition of photo-responsive V2O5 and the doping of P are successfully achieved. Electrochemical measurements show that the Pt (P)-V2O5/CNs exhibits attractive bi-functional electrocatalytic property for ORR and HER, in comparison with the commercial PtRu/C-JM catalyst. More importantly, Pt (P)-V2O5/CNs presents much better electro-photo synergistic catalysis both for ORR and HER due to its excellent photoresponsive properties of V species in Pt (P)-V2O5/CNs, resulting in drastically enhanced catalytic activity and stability under the simulated sunlight irradiation. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.