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

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Title: Bimetallic Cu–Ni catalysts for the WGS reaction – Cooperative or uncooperative effect?
Authors: Pastor Pérez, Laura | Gu, Sai | Sepúlveda-Escribano, Antonio | Ramírez Reina, Tomás
Research Group/s: Materiales Avanzados
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Water-gas shift reaction | Bimetallic catalysts | Cu–Ni | Synergy | Anti-synergy
Knowledge Area: Química Inorgánica
Issue Date: 8-Feb-2019
Publisher: Elsevier
Citation: International Journal of Hydrogen Energy. 2019, 44(8): 4011-4019. doi:10.1016/j.ijhydene.2018.12.127
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.
Sponsor: Financial support for this work was provided by the EPSRC grants EP/J020184/2 and EP/R512904/1 as well as the Royal Society Research Grant RSGR1180353. The Spanish team acknowledges Ministerio de Economía, Industria y Competitividad of Spain (Project MAT2013-45008-P). L. Pastor-Perez acknowledges Generalitat Valenciana for her postdoctoral grant (APOSTD/2017). Sasol is kindly acknowledged for providing the support.
ISSN: 0360-3199 (Print) | 1879-3487 (Online)
DOI: 10.1016/j.ijhydene.2018.12.127
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd.
Peer Review: si
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