化学
合金
丙醇
纳米棒
金属
面(心理学)
正丙醇
化学工程
无机化学
有机化学
乙醇
心理学
社会心理学
人格
工程类
五大性格特征
作者
Soojin Jeong,Chuanliang Huang,Zachary Levell,Rebecca X. Skalla,Hong Wang,Nicole J. Escorcia,Yaroslav Losovyj,Baixu Zhu,Alex Butrum-Griffith,Yang Liu,Christina Li,Danielle Reifsnyder Hickey,Yuanyue Liu,Xingchen Ye
摘要
Electroreduction of CO2 into liquid fuels is a compelling strategy for storing intermittent renewable energy. Here, we introduce a family of facet-defined dilute copper alloy nanocrystals as catalysts to improve the electrosynthesis of n-propanol from CO2 and H2O. We show that substituting a dilute amount of weak-CO-binding metals into the Cu(100) surface improves CO2-to-n-propanol activity and selectivity by modifying the electronic structure of catalysts to facilitate C1–C2 coupling while preserving the (100)-like 4-fold Cu ensembles which favor C1–C1 coupling. With the Au0.02Cu0.98 champion catalyst, we achieve an n-propanol Faradaic efficiency of 18.2 ± 0.3% at a low potential of −0.41 V versus the reversible hydrogen electrode and a peak production rate of 16.6 mA·cm–2. This study demonstrates that shape-controlled dilute-metal-alloy nanocrystals represent a new frontier in electrocatalyst design, and precise control of the host and minority metal distributions is crucial for elucidating structure–composition–property relationships and attaining superior catalytic performance.
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