Toward Design of Synergistically Active Carbon-Based Catalysts for Electrocatalytic Hydrogen Evolution


"Replacement  of  precious  Pt  catalyst  with  cost-effective  alternatives would be significantly beneficial for hydrogen production via electrocatalytic hydrogen evolution reaction (HER). All candidates thus far are exclusively metallic catalysts, which suffer inherent corrosion  and oxidation susceptibility  during acidic proton-exchange embrane  electrolysis.  Herein,  based  on  theoretical  predictions,  we  designed  and synthesized nitrogen (N) and phosphorus (P) dual-doped graphene as a nonmetallic electrocatalyst  for  sustainable  and  efficient  hydrogen  production.  The  N  and  P heteroatoms could coactivate the adjacent C atom in the graphene matrix by affecting its valence orbital energy levels to induce a synergistically enhanced reactivity toward HER. As a result, the dual-doped graphene showed higher electrocatalytic HER activity than single-doped ones and comparable performance to some of the traditional metallic catalysts.

Related subjects: Production & Supply Chain
Countries: Australia

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