Hydrogen-etched CoS₂ to produce a Co₉S₈@CoS₂ heterostructure electrocatalyst for highly efficient oxygen evolution reaction.

ABSTRACT: There is a pressing requirement for developing high-efficiency non-noble metal electrocatalysts in oxygen evolution reactions (OER), where transition metal sulfides are considered to be promising electrocatalysts for the OER in alkaline medium. Herein, we report the outstanding OER performance of Co₉S₈@CoS₂ heterojunctions synthesized by hydrogen etched CoS₂, where the optimized heterojunction shows a low η ₅₀ of 396 mV and a small Tafel slope of 181.61 mV dec^-1. The excellent electrocatalytic performance of this heterostructure is attributed to the interface electronic effect. Importantly, the post-stage characterization results indicate that the Co₉S₈@CoS₂ heterostructure exhibits a

SUBMITTER: Dong Y 

PROVIDER: S-EPMC9041110 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature