Influence of carbon support surface modification on the performance of nickel catalysts in carbon dioxide hydrogenation

Visser, Nienke L., Verschoor, Juliette C., Smulders, Luc C.J., Mattarozzi, Francesco, Morgan, David J. ORCID: https://orcid.org/0000-0002-6571-5731, Meeldijk, Johannes D., van der Hoeven, Jessi E.S., Stewart, Joseph A., Vandegehuchte, Bart D. and de Jongh, Petra E. 2023. Influence of carbon support surface modification on the performance of nickel catalysts in carbon dioxide hydrogenation. Catalysis Today , 114071. 10.1016/j.cattod.2023.114071

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Abstract

The interaction between metal nanoparticles and a support is of key importance in catalysis. In this study, we demonstrate that the introduction of oxygen- or nitrogen-containing support surface groups on a graphite nanoplatelet support influence the performance of nickel supported catalysts during CO2 hydrogenation. By careful design of the synthesis conditions, the Ni nanoparticle size of the fresh catalysts was not affected by the type of support surface groups. A combination of H2 chemisorption and high resolution TEM demonstrates that the available metal surface depends on the interaction with the carbon support. The amination treatment results in the weakest interaction between the Ni and the support, showing the highest initial Ni weight-based activity, although at the expense of nanoparticle stability. Hence initial enhancement in activity is not always optimal for long term catalysis. The use of carbon with a higher density of oxygen functional groups that are stable above 350 °C, is beneficial for preventing deactivation due to particle growth. Furthermore, small amounts of contaminants can have a substantial influence on the CH4 selectivity at low conversions.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Additional Information:	License information from Publisher: LICENSE 1: Title: This article is under embargo with an end date yet to be finalised.
Publisher:	Elsevier
ISSN:	0920-5861
Date of First Compliant Deposit:	29 March 2023
Date of Acceptance:	26 February 2023
Last Modified:	03 May 2023 09:16
URI:	https://orca.cardiff.ac.uk/id/eprint/157476

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