Highly Active and Selective Hydrogenation of CO2 to Ethanol by Ordered Pd–Cu Nanoparticles
Shuxing Bai†, Qi Shao†, Pengtang Wang†, Qiguang Dai‡, Xingyi Wang‡, and Xiaoqing Huang*†（黄小青）
† College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu 215123, China
‡ Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science& Technology, Shanghai 200237, China
J. Am. Chem. Soc., 2017, 139 (20), 6827--6830
Carbon dioxide (CO2) hydrogenation to ethanol (C2H5OH) is considered a promising way for CO2 conversion and utilization, whereas desirable conversion efficiency remains a challenge. Herein, highly active, selective and stable CO2 hydrogenation to C2H5OH was enabled by highly ordered Pd-Cu nanoparticles (NPs). By tuning the composition of the Pd-Cu NPs and catalyst supports, the efficiency of CO2 hydrogenation to C2H5OH was well optimized with Pd2Cu NPs/P25 exhibiting high selectivity to C2H5OH of up to 92.0% and the highest turnover frequency of 359.0 h–1. Diffuse reflectance infrared Fourier transform spectroscopy results revealed the high C2H5OH production and selectivity of Pd2Cu NPs/P25 can be ascribed to boosting *CO (adsorption CO) hydrogenation to *HCO, the rate-determining step for the CO2 hydrogenation to C2H5OH.