Highly dispersed Pt-based catalysts for selective CO2 hydrogenation to methanol at atmospheric pressure

作者：Men, Yu-Long; Liu, Yi; Wang, Qianqian; Luo, Zheng-Hong; Shao, Shuai; Li, Yi-Bao; Pan, Yun-Xiang^*

来源：Chemical Engineering Sciences, 2019, 200: 167-175.

DOI：10.1016/j.ces.2019.02.004

• Methanol
• Highly-dispersed Pt nanoparticles
• Atmospheric-pressure CO2 hydrogenation
• CO2 adsorption
• Cold plasma

Hydrogenation of CO2 into methanol is promising for achieving the sustainable energy economy, but still has some problems, e. g. low methanol selectivity and high operation pressures (> 10 atm). Herein, we prepared a Pt/film hybrid with highly dispersed Pt nanoparticles, and combined Pt/film with In2O3 to form a Pt/film/In2O3 catalyst. By using a dielectric barrier discharge (DBD) plasma reactor, a CO2 conversion of 37.0% and a methanol selectivity of 62.6% are achieved in the hydrogenation of CO2 with H-2 on Pt/film/In2O3 at 1 atm and 30 degrees C. These are higher than those on Pt/In2O3 prepared by the conventional high-temperature H-2 reduction (24.9% and 36.5%) and commercial Cu/ZnO/Al2O3 (25.6% and 35.1%). The high-energy electrons of the DBD plasma trigger the CO2 hydrogenation at 1 atm and 30 degrees C. The higher Pt nanoparticles dispersion, film and In2O3 promote the adsorption of CO2 on Pt/film/In2O3, thus enhancing the hydrogenation of CO2 into methanol. These results are helpful for efficient methanol production from CO2 hydrogenation under atmospheric pressure.

• 单位
  电子科技大学; 上海交通大学; 赣南师范学院