Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 272, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118960
Keywords
Support effect; Carbon nanotube; Single atom; Fe-N coordination; CO2 electroreduction
Funding
- National Natural Science Foundation of China [21676093, 21838003, 21776092, 21808061, 91834301]
- Shanghai Scientific and Technological Innovation Project [18JC1410500]
- Social Development Program of Shanghai [17DZ1200900]
- Innovation Program of Shanghai Municipal Education Commission
- Fundamental Research Funds for the Central Universities [222201718002]
Ask authors/readers for more resources
Metal-N-C materials have attracted considerable attention for electrocatalytic CO2 reduction. Local electronic and geometric structure of active sites in the metal-N-C catalysts significantly determine catalytic reactivity. In this work, atomically dispersed Fe species with different coordination environment are anchored into carbon supports through introducing aminated carbon nanotubes, as effectively revealed by the Cs-corrected transmission electron microscope and X-ray absorption near edge structure spectra. Electrochemical tests show that the catalyst with the aminated carbon nanotubes has a low overpotential (0.39 V) and high selectivity of CO up to 95.47 % at -0.6 V vs. RHE. The density functional theory calculation results indicate that the additional axial Fe-N coordination compared with the planar Fe-N coordination can reduce the free energy required for the desorption of CO from the adsorption site and inhibit the occurrence of hydrogen evolution reaction, thus leading to improve the selectivity of CO.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available