Iron catalysts supported on nitrogen functionalized carbon for improved CO2 hydrogenation performance
Catalysis Communications 149 (2021) 106216
Rungtiwa Kosol a, Lisheng Guo a,*, Naoya Kodama a, Peipei Zhang a,*, Prasert Reubroycharoen b,
Tharapong Vitidsant b, Akira Taguchi c, Takayuki Abe c, Jienan Chen d, Guohui Yang a, Yoshiharu Yoneyama a, Noritatsu Tsubaki a,*
a Department of Applied Chemistry, School of Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
b Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
c Hydrogen Isotope Research Center, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
d Ministry of Forestry Bioethanol Research Center, Central South University of Forestry and Technology, Changsha 410004, China
Abstract
Preparation of highly efficient Fe-based catalysts is a reliable and achievable goal for catalyzing CO2 hydrogenation. Herein, ethylene diamine as a benign modifier well regulates the surface properties of carbon support, achieving a good dispersion of active small-size iron carbide sites. With the further incorporation of alkaline K
promoter, heavy hydrocarbon selectivity (C5+) is increased from 14.8% to 39.8%. Combining several catalyst characterization (XRD, CO2-TPD, H2-TPR, TEM, and XPS) and reaction data, discloses that good dispersion,
enhanced reduction/carburization behavior, and small-size carbides formation are essential for improving CO2 performance. Simultaneous doping of nitrogen atoms and alkali metal provides a promising means for CO2 fixation and rational design of functionalized metal-supported carbon catalysts.
Keywords:Nitrogen incorporation, CO2hydrogenation, Carbon materials, Fe-based catalyst, Alkaline promoter
Accepted:29 October 2020