A Nanocomposite of Bismuth Clusters and Bi2O2CO3 Sheets for Highly Efficient Electrocatalytic Reduction of CO2 to Formate. (7th December 2022)

• Record Type: Journal Article
• Authors: Lin, Li; He, Xiaoyang; Zhang, Xia‐Guang; Ma, Wenchao; Zhang, Biao; Wei, Diye; Xie, Shunji; Zhang, Qinghong; Yi, Xiaodong; Wang, Ye
• Is Part Of: Angewandte Chemie. Volume 135:Number 3(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-12-07
• Subjects: Bismuth -- Carbon Dioxide Reduction -- Electrochemistry -- Formic Acid -- Heterogeneous Catalysis; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202214959
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The renewable‐electricity‐driven CO2 reduction to formic acid would contribute to establishing a carbon‐neutral society. The current catalyst suffers from limited activity and stability under high selectivity and the ambiguous nature of active sites. Herein, we report a powerful Bi2 S3 ‐derived catalyst that demonstrates a current density of 2.0 A cm −2 with a formate Faradaic efficiency of 93 % at −0.95 V versus the reversible hydrogen electrode. The energy conversion efficiency and single‐pass yield of formate reach 80 % and 67 %, respectively, and the durability reaches 100 h at an industrial‐relevant current density. Pure formic acid with a concentration of 3.5 mol L −1 has been produced continuously. Our operando spectroscopic and theoretical studies reveal the dynamic evolution of the catalyst into a nanocomposite composed of Bi 0 clusters and Bi2 O2 CO3 nanosheets and the pivotal role of Bi 0 −Bi2 O2 CO3 interface in CO2 activation and conversion. Abstract : An electrocatalyst derived from Bi2 S3 is very powerful for the reduction of CO2 to formic acid, achieving a current density of 2.0 A cm −2 with a formate Faradaic efficiency of 93 % and a single‐pass formate yield of 67 %. The active catalyst is composed of Bi nanoclusters on Bi2 O2 CO3 nanosheets and the interfacial Bi site plays a pivotal role.