MOF‐Derived Cu/Bi Bi‐metallic Catalyst to Enhance Selectivity Toward Formate for CO2 Electroreduction. Issue 4 (17th February 2022)

• Record Type: Journal Article
• Authors: Xue, Yi; Li, Chengjin; Zhou, Xiaoxia; Kuang, Zhaoyu; Zhao, Wanpeng; Zhang, Qingming; Chen, Hangrong
• Is Part Of: ChemElectroChem. Volume 9:Issue 4(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-17
• Subjects: Bi-metallic effect -- Bismuth -- Copper -- CO2 reduction -- MOFs derived; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.202101648
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: Converting CO2 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 N2 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 CO2 and shows a stronger adsorption capability for the CO2 ⋅ − intermediate than that of reference Bi/Bi2 O3 @C without Cu species. XPS analysis indicates the boosted performance for CO2 reduction reaction, which could be ascribed to synergistic coordination of Bi 0 and Bi 3+ in the catalyst. The optimized Cu1 −Bi/Bi2 O3 @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 CO2 reduction. Abstract : Bi‐metallic cylinders : A series of novel Cu/Bi bi‐metallic compounds derived from MOFs were prepared for CO2 electrochemical reduction. The obtained Cu/Bi bi‐metallic system not only provides tunable electronic structure, but also effectively decreases energy barriers of CO2 activation, showing stronger adsorption capability for the CO2 ⋅ − intermediate and thus, leading to a high selectivity toward HCOOH.