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Selectively Converting Carbon Dioxide to Syngas over Intermetallic AuCu Catalysts
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-02-03 , DOI: 10.1021/acssuschemeng.0c09146
Youjia Han 1 , Zhitong Wang 1 , Xiaotong Han 2 , Wensheng Fang 1 , Yansong Zhou 1 , Kai Lei 1 , Bo You 1 , Ho Seok Park 2 , Bao Yu Xia 1
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Electroreduction of carbon dioxide (CO2) is attractive for efficiently recycling excessive CO2 to value-added feedstocks. However, their efficiency and selectivity strongly rely on the electrocatalysts. Herein, we report intermetallic AuCu catalysts for the selective and efficient CO2 conversion to syngas. Particularly, the ordered AuCu intermetallic catalyst achieves a high faradic efficiency of 75% with a partial current density of 78.3 mA cm–2 at −0.6 V vs reversible hydrogen electrode (RHE) for producing CO in a flowing cell configuration. Moreover, the content of the generated syngas is widely controlled according to the potential-dependent CO2 reduction. Electrochemical results demonstrate that crystal engineering in ordered intermetallic alloy improves the activity and selectivity of CO2 reduction. This work not only provides efficient intermetallic AuCu catalysts for selectively converting CO2 but also offers valuable insights into crystal engineering for comprehensive and selective utilization of CO2 for a sustainable community.

中文翻译:

在金属间金铜催化剂上选择性地将二氧化碳转化为合成气

二氧化碳(CO 2)的电还原对于有效地将过量的CO 2再循环到增值原料中具有吸引力。但是,它们的效率和选择性强烈依赖于电催化剂。在本文中,我们报告了金属间化合物AuCu催化剂,用于选择性和有效地将CO 2转化为合成气。尤其是,与可逆氢电极(RHE)相比,有序AuCu金属间催化剂在-0.6 V时的分流密度为78.3 mA cm -2时可达到75%的高法拉第效率,该可逆氢电极用于在流通池配置中生产CO。此外,根据电势相关的CO 2广泛控制生成的合成气的含量减少。电化学结果表明,在有序金属间合金中进行晶体工程改进了CO 2还原的活性和选择性。这项工作不仅提供了用于选择性转化CO 2的高效金属间AuCu催化剂,而且还为晶体工程学提供了宝贵的见识,以全面和选择性地利用CO 2来实现可持续发展。
更新日期:2021-02-15
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