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Understanding the promoter effect of Cu and Cs over highly effective <beta>-Mo2C catalysts for the reverse water-gas shift reaction

Zhang, Qi, Pastor Perez, Laura, Jin, Wei, Gu, Sai and Ramirez Reina, Tomas (2019) Understanding the promoter effect of Cu and Cs over highly effective <beta>-Mo2C catalysts for the reverse water-gas shift reaction Applied Catalysis B: Environmental, 244. pp. 889-898.

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Abstract

Mo2C is an effective catalyst for chemical CO2 upgrading via reverse water-gas shift (RWGS). In this work, we demonstrate that the activity and selectivity of this system can be boosted by the addition of promoters such as Cu and Cs. The addition of Cu incorporates extra active sites such as Cu+ and Cu0 which are essential for the reaction. Cs is an underexplored dopant whose marked electropositive character generates electronic perturbations on the catalyst’s surface leading to enhanced catalytic performance. Also, the Cs-doped catalyst seems to be in-situ activated due to a re-carburization phenomenon which results in fairly stable catalysts for continuous operations. Overall, this work showcases a strategy to design highly efficient catalysts based on promoted β-Mo2C for CO2 recycling via RWGS.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Zhang, Qiqi.zhang@surrey.ac.uk
Pastor Perez, Laural.pastorperez@surrey.ac.uk
Jin, Weiw.jin@surrey.ac.uk
Gu, Saisai.gu@surrey.ac.uk
Ramirez Reina, Tomast.ramirezreina@surrey.ac.uk
Date : 5 May 2019
Funders : Engineering and Physical Sciences Research Council (EPSRC), Royal Society
DOI : 10.1016/j.apcatb.2018.12.023
Copyright Disclaimer : © 2018. This manuscript version is made available under the CC-BY 4.0 license http://creativecommons.org/licenses/by/4.0/
Uncontrolled Keywords : CO2 conversion, rWGS, Mo2C catalyst, Cs promoter, Cu promote
Depositing User : Melanie Hughes
Date Deposited : 07 Dec 2018 10:37
Last Modified : 15 Apr 2019 13:42
URI: http://epubs.surrey.ac.uk/id/eprint/849999

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