Journal
CATALYSIS SURVEYS FROM ASIA
Volume 27, Issue 3, Pages 260-269Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10563-023-09391-1
Keywords
CO2 hydrogenation; g-C3N4; Hydrocarbon synthesis; Iron carbides
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FeCx catalysts were synthesized by co-pyrolyzing iron nitrate with various CN sources. The Fe-d-C3N4-(0.3)-Py catalyst exhibited the highest CO2 conversion, olefin yield, and olefin STY, attributed to its high surface FeCx concentration. A correlation between surface FeCx and hydrocarbon/olefin STY was established.
FeCx catalysts (Fe-CN-Py) were synthesized by co-pyrolyzing the mixture of iron nitrate and a CN source (melamine, bulk g-C3N4 (b-C3N4), or defective g-C3N4 (d-C3N4)). The physicochemical properties of Fe-CN-Py catalysts and their activities of CO2 hydrogenation to light hydrocarbon (C-2-C-6) were analyzed. The results indicated that Fe-d-C3N4-(0.3)-Py is the most promising with the highest CO2 conversion (47.2%), olefin yield (10.8%), and olefin space-time yield (STY = 4.5 mu mol olefin/s/g(Fe)). The promising activity of Fe-d-C3N4-(0.3)-Py was attributed to its high concentration of surface FeCx. The correlation between surface FeCx and the STY of hydrocarbons and olefins was established.
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