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

Electrocatalytic carbon-dioxide reduction reactions (ECO₂RR) 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-WS₂/WO₃ nanohybrids as an efficient selective formate conversion electrocatalyst with regard to ECO₂RR 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-WS₂/WO₃ 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 ECO₂RR applications.