Quadrangular prism-like oxidized tin sulfide for high activity CO2ER to formate

Abstract

A quadrangular prism-like oxidized tin sulfide catalyst with abundant sulfur vacancies was designed and synthesized for the CO₂ER. The quadrangular prism-like structure is utilized to increase the stability, while vacancy engineering is used to improve the activity and selectivity of the catalyst. The catalyst exhibits exceptional electrocatalytic activity for CO₂ reduction to HCOO⁻, achieving up to 95% faradaic efficiency for HCOO⁻ and maintaining stability for up to 36 hours at −1.0 V vs. RHE in a 0.1 M KHCO₃ electrolyte.