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Bimetallic Cu-Ni catalysts for the WGS reaction- Cooperative or uncooperative effect?

Pastor-Perez, Laura, Gu, Sai, Sepúlveda-Escribano, Antonio and Reina, Tomas R. (2019) Bimetallic Cu-Ni catalysts for the WGS reaction- Cooperative or uncooperative effect? International Journal of Hydrogen Energy, 44 (8). pp 4011-4019.

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Abstract

In this work, bimetallic Cu–Ni catalysts have been studied in the water-gas shift (WGS) reaction, and they have shown different levels of synergy and anti-synergy in terms of catalytic activity and selectivity to the desired products. Cu–Ni interactions alter the physicochemical properties of the prepared materials (i.e. surface chemistry, redox behaviour, etc.) and as a result, the catalytic trends are influenced by the catalysts' composition. Our study reveals that Cu enhances Ni selectivity to CO2 and H2 by preventing CO/CO2 methanation, while Ni does not help to improve Cu catalytic performance by any means. Indeed, the monometallic Cu formulation has shown the best results in this study, yielding high levels of reactants conversion and excellent long-term stability. Interestingly, for medium-high temperatures, the bimetallic 1Cu–1Ni outperforms the stability levels reached with the monometallic formulation and becomes an interesting choice even when start-up/shutdowns operations are considered during the catalytic experiments.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Pastor-Perez, Laural.pastorperez@surrey.ac.uk
Gu, Saisai.gu@surrey.ac.uk
Sepúlveda-Escribano, Antonio
Reina, Tomas R.t.ramirezreina@surrey.ac.uk
Date : 8 January 2019
Funders : Engineering and Physical Sciences Research Council (EPSRC), Royal Society
DOI : 10.1016/j.ijhydene.2018.12.127
Copyright Disclaimer : © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : Water-gas shift reaction; Bimetallic catalysts; Cu–Ni; Synergy; Anti-synergy
Depositing User : Clive Harris
Date Deposited : 15 Jan 2019 14:45
Last Modified : 09 Jan 2020 02:08
URI: http://epubs.surrey.ac.uk/id/eprint/850145

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