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Engineering Bismuth–Tin Interface in Bimetallic Aerogel with a 3D Porous Structure for Highly Selective Electrocatalytic CO2 Reduction to HCOOH
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2021-03-15 , DOI: 10.1002/anie.202102832 Tianyi Ma 1 , Zexing Wu 2 , Hengbo Wu 3 , Weiquan Cai 4 , Zhenhai Wen 5 , Lei Wang 2 , Wei Jin 6 , Baohua Jia 7
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2021-03-15 , DOI: 10.1002/anie.202102832 Tianyi Ma 1 , Zexing Wu 2 , Hengbo Wu 3 , Weiquan Cai 4 , Zhenhai Wen 5 , Lei Wang 2 , Wei Jin 6 , Baohua Jia 7
Affiliation
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Electrochemical reduction of CO2 (CO2RR) 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 CO2RR 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.
中文翻译：
具有3D多孔结构的双金属气凝胶中的工程铋-锡界面，用于高选择性电催化将CO2还原为HCOOH
将CO 2（CO 2 RR）电化学还原成有价值的碳氢化合物可减轻过量的CO 2含量。我们展示了金属铋-锡（Bi-Sn）气凝胶首次用于具有选择性HCOOH生产的CO 2 RR。在环境温度下可以轻松制备出Bi-Sn的非贵金属双金属气凝胶，它具有3D形态，具有相互连接的通道，丰富的界面和亲水性表面。Bi-Sn气凝胶优于Bi和Sn，具有更多的活性位点，并具有良好的传质性能，使其具有93.9％的高FE HCOOH。此外，Bi-Sn气凝胶可实现FE HCOOH约。90％在液流电池中保持10小时。原位ATR-FTIR测量证实* HCOO的形成是甲酸生成的速率决定性步骤。DFT证明Bi和Sn的共存优化了生产HCOOH的能垒，从而提高了催化活性。
更新日期：2021-05-17
中文翻译：
具有3D多孔结构的双金属气凝胶中的工程铋-锡界面，用于高选择性电催化将CO2还原为HCOOH
将CO 2（CO 2 RR）电化学还原成有价值的碳氢化合物可减轻过量的CO 2含量。我们展示了金属铋-锡（Bi-Sn）气凝胶首次用于具有选择性HCOOH生产的CO 2 RR。在环境温度下可以轻松制备出Bi-Sn的非贵金属双金属气凝胶，它具有3D形态，具有相互连接的通道，丰富的界面和亲水性表面。Bi-Sn气凝胶优于Bi和Sn，具有更多的活性位点，并具有良好的传质性能，使其具有93.9％的高FE HCOOH。此外，Bi-Sn气凝胶可实现FE HCOOH约。90％在液流电池中保持10小时。原位ATR-FTIR测量证实* HCOO的形成是甲酸生成的速率决定性步骤。DFT证明Bi和Sn的共存优化了生产HCOOH的能垒，从而提高了催化活性。
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