催化作用
粒径
选择性
纳米颗粒
粒子(生态学)
甲烷
材料科学
碳氢化合物
乙烯
无机化学
化学工程
化学
分析化学(期刊)
纳米技术
物理化学
有机化学
工程类
地质学
海洋学
作者
Hemma Knights,Rulle Reske,Farzad Behafarid,Beatriz Roldan,Peter Strasser
出处
期刊:Meeting abstracts
日期:2014-04-01
卷期号:MA2014-01 (17): 769-769
标识
DOI:10.1149/ma2014-01/17/769
摘要
A combined experimental and computational study of catalytic particle size effects during CO 2 electroreduction on size-controlled Cu nanoparticles is presented. Cu nanoparticle catalysts in the 2 – 15 nm mean size range were prepared, and their catalytic activity and selectivity during CO 2 electroreduction were analyzed and compared to bulk Cu electrode. An increase in the catalytic activity as well as the H 2 and CO selectivity was observed with decreasing Cu particle size, in particular for particles below around 2 nm. Hydrocarbon (methane and ethylene) selectivity was increasingly suppressed with smaller particle size. A spherical Cu particle model was used to analyze the size dependence of the surface atomic coordination, which was correlated to experimental results.
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