Ultrahigh Mass Activity for Carbon Dioxide Reduction Enabled by Gold–Iron Core–Shell Nanoparticles

作者：Kun Sun, Tao Cheng, Lina Wu, Yongfeng Hu, Jigang Zhou, Aimee Maclennan, Zhaohua Jiang, Yunzhi Gao, William A. Goddard, Zhijiang Wang · 发表于：Journal of the American Chemical Society · 年份：2017 · DOI：10.1021/jacs.7b09251 · 被引用次数：218 · 研究领域：CO2 Reduction Techniques and Catalysts、Electrocatalysts for Energy Conversion、Catalytic Processes in Materials Science

High Resolution Image Download MS PowerPoint Slide Wide application of carbon dioxide (CO 2 ) electrochemical energy storage requires catalysts with high mass activity. Alloy catalysts can achieve superior performance to single metals while reducing the cost by finely tuning the composition and morphology. We used in silico quantum mechanics rapid screening to identify Au–Fe as a candidate improving CO 2 reduction and then synthesized and tested it experimentally. The synthesized Au–Fe alloy catalyst evolves quickly into a stable Au–Fe core–shell nanoparticle (AuFe-CSNP) after leaching out surface Fe. This AuFe-CSNP exhibits exclusive CO selectivity, long-term stability, nearly a 100-fold increase in mass activity toward CO 2 reduction compared with Au NP, and 0.2 V lower in overpotential. Calculations show that surface defects due to Fe leaching contribute significantly to decrease the overpotential.