Anti-dissolution Pt single site with Pt(OH)(O₃)/Co(P) coordination for efficient alkaline water splitting electrolyzer.

ABSTRACT: As the most well-known electrocatalyst for cathodic hydrogen evolution in water splitting electrolyzers, platinum is unfortunately inefficient for anodic oxygen evolution due to its over-binding with oxygen species and excessive dissolution in oxidative environment. Herein we show that single Pt atoms dispersed in cobalt hydrogen phosphate with an unique Pt(OH)(O₃)/Co(P) coordination can achieve remarkable catalytic activity and stability for oxygen evolution. The catalyst yields a high turnover frequency (35.1 ± 5.2 s^-1) and mass activity (69.5 ± 10.3 A mg^-1) at an overpotential of 300 mV and excellent stability. Mechanistic studies elucidate that the superior catalytic performance of isolated Pt atoms herein stems from optimal binding energies of oxygen i

SUBMITTER: Zeng L 

PROVIDER: S-EPMC9250493 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature