In Situ Confined Growth of Bismuth Nanoribbons with Active and Robust Edge Sites for Boosted CO 2 Electroreduction

作者：Youzeng Li, Jialei Chen, Shan Chen, Xuelong Liao, Tete Zhao, Fangyi Cheng, Huan Wang · 发表于：ACS Energy Letters · 年份：2022 · DOI：10.1021/acsenergylett.2c00326 · 被引用次数：130 · 研究领域：CO2 Reduction Techniques and Catalysts、Ionic liquids properties and applications、Advanced Thermoelectric Materials and Devices

Metallic bismuth (Bi) shows great promise in electrocatalytic CO 2 reduction into formate. However, the direct synthesis of active and stable Bi electrocatalysts remains a grand challenge. Herein, we present an in-plane confined hydrogen-reduction strategy for in situ growth of edge-modified Bi nanoribbons, which enables enhanced and stable reduction of CO 2 into formate. Density functional theory calculations suggest that the synergistic effect of a preferentially exposed (113) facet and abundant Bi–O edge sites can contribute to a reduced formation energy for the formate intermediate. Moreover, in situ Raman characterizations reveal the Bi–O edge sites can remain stable during the reaction. Consequently, the Bi nanoribbons exhibit a high formate Faradaic efficiency of over 95% in a wide potential window. More impressively, a negligible degradation in selectivity and activity after more than 100 h of continuous operation can be achieved. This work provides a feasible strategy for fabricating robust catalysts for efficient CO 2 reduction.