格式化
催化作用
甲酸
二氧化碳电化学还原
选择性
氧化锡
氧气
电化学
氧化还原
材料科学
二氧化锡
吸附
锡
无机化学
氧化物
金属
光化学
化学
一氧化碳
电极
有机化学
物理化学
作者
Lulu Li,Zhi‐Jian Zhao,Congling Hu,Ping Yang,Xintong Yuan,Yanan Wang,Lei Zhang,Lyudmila V. Moskaleva,Jinlong Gong
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2020-01-17
卷期号:5 (2): 552-558
被引量:57
标识
DOI:10.1021/acsenergylett.9b02749
摘要
Tin oxide (SnOx) has emerged as a promising metal oxide catalyst for the CO2 reduction reaction (CO2RR) into value-added chemicals such as formic acid/formate. However, the improvement of SnOx catalytic performance is hindered by its complex surface structures and limited knowledge about the nature of the active sites. This Letter describes the critical role of oxygen vacancies (Ov) in partially reduced SnO2(110) for CO2RR selectivity by combined theoretical and experimental studies. The SnOx with moderate content of Ov is the most active surface and can suppress the undesirable hydrogen evolution reaction simultaneously. This is also confirmed by the electrochemical experiments that also demonstrate that the selectivity of HCOOH changes with varied content of Ov. Further electronic structure analysis reveals that the bond strength and charge transfer between HCOO* and the active site can be regulated by varying the content of Ov, so that the adsorption strength of HCOO* can be tuned.
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