无定形固体
法拉第效率
电化学
可逆氢电极
化学工程
材料科学
催化作用
合金
水溶液
纳米颗粒
甲烷
选择性
非晶态金属
纳米技术
电极
无机化学
化学
冶金
物理化学
有机化学
工作电极
工程类
作者
Jingjing Shan,Kun Sun,Huiyi Li,Ping Xu,Jianmin Sun,Zhijiang Wang
标识
DOI:10.1016/j.jcou.2020.101285
摘要
Cu is considered as a promising catalyst for the electrochemical CO2 reduction reaction (ECO2RR) into useful chemicals/fuels, such as CH4. However, its poor selectivity and low activity toward target products remain urgent issues. Here, novel core/shell [email protected] nanoparticles (NPs) with amorphous CuEu alloy shell synthesized via a simple co-reduction method were used as cathodes for ECO2RR in KHCO3 aqueous solution. The CH4 Faradaic efficiency of the optimized [email protected] NPs was 74.7 %, which was 3.4-fold higher than that of Cu NPs. Moreover, the [email protected] NPs exhibited a high current density of 45.4 mA cm−2 at −1.2 V vs. reversible hydrogen electrode (RHE). The amorphous CuEu shell triggered the reaction via a synergistic effect between electronic structure regulation and abundant active defective sites, thus facilitating highly efficient methane production from CO2 electroreduction.
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