Journal
CARBON
Volume 167, Issue -, Pages 658-667Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2020.06.036
Keywords
Iron phthalocyanine; Graphene; CO2 reduction reaction; Synergistic catalysis; Single-atom catalyst
Funding
- National Natural Science Foundation of China [21705150, 21473204]
- Science and Technology Planning Project of Fujian Province [2014H2008]
Ask authors/readers for more resources
The non-precious materials with iron-pyrrolic nitrogen-carbon (Fe-N-C) moiety have attracted an increasing attention on the CO2 reduction reaction (CO2RR). However, the influence of iron valence state and environmental synergy is not still clear. Here, iron phthalocyanine (FePc) molecule with an intrinsic Fe-N-4-C moiety is enough dispersed on graphene as the single-atom iron catalyst through a facile chemical method. The FePc-graphene composites with different FePc content and iron valence state are synthesized to investigate their catalysis for the CO2RR to CO. The onset overpotential of 190 mV and Faradaic efficiency of >90% may be achieved in the optimal composites. Experimental and calculational results prove the positive role and synergy of Fe(II)Pc with Fe(III)Pc and graphene. The formation of *COOH intermediate is confirmed to be the rate-limiting step. The theoretical calculation reveals that Fe(II)Pc should have higher activity than Fe(III)Pc, and Fe(II)Pc/FePc(III) dimer may be better than individual one. This work clearly exhibits the effect of Fe2+/3+-pyrrolic N-4-C on the CO2RR. (C) 2020 Elsevier Ltd. All rights reserved.
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