In-Sn alloy core-shell nanoparticles: In-doped SnOx shell enables high stability and activity towards selective formate production from electrochemical reduction of CO2
In-Sn alloy core-shell nanoparticles: In-doped SnOx shell enables high stability and activity towards selective formate production from electrochemical reduction of CO2
复制标题
In-Sn 合金核壳纳米粒子：In 掺杂 SnOx 壳具有高稳定性和活性，可通过电化学还原 CO2 选择性生产甲酸盐
DOI：
10.1016/j.apcatb.2021.119979
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发表时间：
2021-02-26
影响因子：
22.1
通讯作者：
Chen, Shaowei
中科院分区：
文献类型：
--
作者：
Wang, Jigang;Ning, Shunlian;Chen, Shaowei
SnO2 has been recognized as excellent catalyst towards formate production from electrochemical CO2 reduction (CO2R). However, it is a great challenge to prepare SnO2 that is stable under the working condition of CO2R and the active center of the SnO2-based catalyst towards CO2R has been illusive. In this work, Sn-In alloy nanoparticles display an InSn4 intermetallic core and an amorphous In-doped tin oxide shell and a CO2-to-formate faradaic efficiency of 94% and a current density of 236 mA cm(-2) was achieved at 0.98 V. Operando X-ray absorption and Raman spectroscopy reveal that the In-doped tin oxide shell remains stable under CO2R condition. Density functional theory calculations indicate that the In-doped tin oxide results in the formation of oxygen vacancy, stabilized tin oxide shell and exergonic pathway for CO2-to-formate, which might account for the high performance of the catalysts towards CO2R.
