Hydrogen spillover enhances alkaline hydrogen electrocatalysis on interface-rich metallic Pt-supported MoO₃.

ABSTRACT: Efficient and cost-effective electrocatalysts for the hydrogen oxidation/evolution reaction (HOR/HER) are essential for commercializing alkaline fuel cells and electrolyzers. The sluggish HER/HOR reaction kinetics in base is the key issue that requires resolution so that commercialization may proceed. It is also quite challenging to decrease the noble metal loading without sacrificing performance. Herein, we report improved HER/HOR activity as a result of hydrogen spillover on platinum-supported MoO₃ (Pt/MoO₃-CN_x-400) with a Pt loading of 20%. The catalyst exhibited a decreased over-potential of 66.8 mV to reach 10 mA cm^-2 current density with a Tafel slope of 41.2 mV dec^-1 for the HER in base. The Pt/MoO₃-CN_x

SUBMITTER: Samanta R 

PROVIDER: S-EPMC10732227 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature