Metallic 1T‐N‐WS2/WO3 Heterojunctions Featuring Interface‐Engineered Cu–S Configuration for Selective Electrochemical CO2 Reduction Reaction

Abstract Electrocatalytic carbon‐dioxide reduction reactions (ECO 2 RR) are one of the most rational techniques to control one's carbon footprint. The desired product formation depends on deliberate reaction kinetics and a choice of electron–proton contribution. Herein the usage of novel CuS active centers decorated over stable 1T metallic N‐WS 2 /WO 3 nanohybrids as an efficient selective formate conversion electrocatalyst with regard to ECO 2 RR is reported. The preferred reaction pathway is identified as *OCHO, which is reduced (by gaining H + + e − ) to HCOO − (HCOO − path) as the primary product. More significantly, at −1.3 V versus RHE yield of FE HCOO − is 55.6% ± 0.5 with a J geo of −125.05 mA cm −2 for CuS@1T‐N‐WS 2 /WO 3 nanohybrids. In addition, predominant catalytic activity, selectivity, and stability properties are observed; further post‐mortem analysis demonstrates the choice of material importance. The present work describes an impressive approach to develop highly active electrocatalysts for selective ECO 2 RR applications.