@article{Kuhn2024, 
author = {Andrew N. Kuhn and Rachel C. Park and Siying Yu and Di Gao and Cheng Zhang and Yuanhui Zhang and Hong Yang},
title = {Valorization of carbon dioxide into C1 product via reverse water gas shift reaction using oxide-supported molybdenum carbides},
year = {2024},
journal = {Carbon Future},
volume = {1},
number = {2},
pages = {9200011},
keywords = {molybdenum carbide, reverse water gas shift reaction, carbon dioxide valorization},
url = {https://www.sciopen.com/article/10.26599/CF.2024.9200011},
doi = {10.26599/CF.2024.9200011},
abstract = {Conversion of carbon dioxide (CO2) to C1 products such as carbon monoxide (CO) is a critical step towards carbon valorization. The conversion has been largely carried out through the reverse water gas shift (RWGS) reaction using noble metal catalysts or copper-based nanostructures. Similarities in the electronic structures between beta phase molybdenum carbides (β-Mo2C) and platinum-group metals make them promising alternatives to traditional catalysts. In this work, we studied the effect of oxide supports (MOx, M = Al, Ce, Mg, Si, and Ti) on the formation and catalytic properties of  β-Mo2C nanoparticle catalysts. The β-Mo2C/SiO2 catalyst exhibited a mass activity of 372 μmolCO2∙ gMo2C−1∙s−1 at 400 °C and 1109 μmolCO2∙ gMo2C−1∙s−1 at 600 °C for the conversion of CO2. The β-Mo2C/SiO2 catalysts also maintained selectivity and showed structural stability in the on-stream study. The enhanced catalytic performance could be attributed to the size of nanocatalysts (4.7 nm), whereas the stability is related to the interaction with SiO2 and the low H2:CO2 feed ratio. This work highlights the application of amorphous silica in preparing metal carbide nanocatalysts. The rich defects and surface vacancies in the silica support greatly facilitate the high-rate and highly selective processes towards the valorization of CO2.}
}