MOF‐Derived Cu/Bi Bi‐metallic Catalyst to Enhance Selectivity Toward Formate for CO<sub>2</sub> Electroreduction
Yi Xue, Chengjin Li, Xiaoxia Zhou, Zhaoyu Kuang, Wanpeng Zhao, Qingming Zhang, Hangrong Chen
Abstract
Abstract Converting CO 2 into high‐value liquid products is a promising strategy to alleviate energy crisis. Herein, a novel Cu/Bi bi‐metal catalyst derived from MOFs has been prepared by a hydrothermal synthesis combining with high temperature calcination under N 2 atmosphere, which shows cylindrical morphology composed of bi‐metallic nanoparticles. It is found that Cu/Bi bi‐metallic system is beneficial to lower the activate energy barrier of CO 2 and shows a stronger adsorption capability for the CO 2 ⋅ − intermediate than that of reference Bi/Bi 2 O 3 @C without Cu species. XPS analysis indicates the boosted performance for CO 2 reduction reaction, which could be ascribed to synergistic coordination of Bi 0 and Bi 3+ in the catalyst. The optimized Cu 1 −Bi/Bi 2 O 3 @C exhibits excellent selectivity toward HCOOH with faradaic efficiency (FE) exceeding 84 % between −0.84 and −1.14 V vs . RHE, and even reaching 93 % at −0.94 V vs . RHE. The obtained Cu/Bi bi‐metal catalyst shows a promising application prospect in the CO 2 reduction.