Engineering Bismuth–Tin Interface in Bimetallic Aerogel with a 3D Porous Structure for Highly Selective Electrocatalytic CO 2 Reduction to HCOOH
| Autor: | Wei Jin, Hengbo Wu, Baohua Jia, Weiquan Cai, Lei Wang, Zexing Wu, Tianyi Ma, Zhenhai Wen |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
010405 organic chemistry Formic acid chemistry.chemical_element Aerogel General Medicine General Chemistry 010402 general chemistry Electrochemistry 01 natural sciences Flow battery Catalysis 0104 chemical sciences Bismuth chemistry.chemical_compound chemistry Chemical engineering Tin Bimetallic strip |
| Zdroj: | Angewandte Chemie International Edition. 60:12554-12559 |
| ISSN: | 1521-3773 1433-7851 |
| Popis: | Electrochemical reduction of CO2 (CO2 RR) into valuable hydrocarbons is appealing in alleviating the excessive CO2 level. We present the very first utilization of metallic bismuth-tin (Bi-Sn) aerogel for CO2 RR with selective HCOOH production. A non-precious bimetallic aerogel of Bi-Sn is readily prepared at ambient temperature, which exhibits 3D morphology with interconnected channels, abundant interfaces and a hydrophilic surface. Superior to Bi and Sn, the Bi-Sn aerogel exposes more active sites and it has favorable mass transfer properties, which endow it with a high FEHCOOH of 93.9 %. Moreover, the Bi-Sn aerogel achieves a FEHCOOH of ca. 90 % that was maintained for 10 h in a flow battery. In situ ATR-FTIR measurements confirmed that the formation of *HCOO is the rate-determining step toward formic acid generation. DFT demonstrated the coexistence of Bi and Sn optimized the energy barrier for the production of HCOOH, thereby improving the catalytic activity. |
| Databáze: | OpenAIRE |
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