题名：Efficient Electrocatalytic Reduction of CO₂ to Ethane over Nitrogen-Doped Fe₂O₃

来源：Journal of the American Chemical Society

发表年代：2022年

作者：

Abstract : Non-copper catalysts are seldom reported to generate C₂₊ products, and the e cient over these catalysts were low. In this work, we reported an iron-based catalyst centered in nitrogen doped γ-Fe₂O₃ (xFe₂O₃-N), which yielded C₂H₆ as major product in H-cell. At -2.0 V vs Ag/Ag⁺, the Faradaic e ciency (FE) for ethane reaches 42% with current densities of 32 mA cm⁻². This is the rst report about selective CO₂ reduction to ethane (C₂H₆) over iron-based catalyst. Results showed that catalyst possessing FeO_1.5-_nN_n sites enriched with oxygen vacancies was bene cial for the stabilization of *COOH intermediate. The exposure of two adjacent surfaces of Fe atoms was conducive to lower the energy barrier for C−C coupling over FeO_1.5-_nN_n sites, facilitating the generation of C₂H₆. This work provides a strategy for design of novel iron-based catalyst with tunable local coordination and electronic structures for converting CO₂ into C₂ products in CO₂RR. Full TextElectrocatalytic reduction of CO₂ under ambient conditions using renewable energy has emerged as an attractive way to maintain carbon balance, which is regarded as one of the cleanest and e cient approaches. Recently, numerous electrocatalysts have been developed for CO₂ reduction reaction (CO₂ RR). However, the majority of these catalyst systems have low e cient for multicarbon (C₂₊ ) products due to the multiple pathways involved in the reaction process. Cu-based catalysts are mostly reported to convert CO₂ into C C₂₊ products such as ethylene, alcohols and acetic acid. Up to now, noncopper catalysts are rarely reported to generate C₂₊ products .

Efficient Electrocatalytic Reduction of CO₂ to Ethane over Nitrogen-Doped Fe₂O₃.pdf