New findings regarding the role of copper entity particle size on the performance of Cu/ceria-based catalysts in the CO-PROX reaction
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Title: | New findings regarding the role of copper entity particle size on the performance of Cu/ceria-based catalysts in the CO-PROX reaction |
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Authors: | Martínez-Munuera, Juan Carlos | Giménez-Mañogil, Javier | Yeste, María Pilar | Hungría, Ana Belén | Cauqui, Miguel Ángel | Garcia-Garcia, Avelina | Calvino, Jose J. |
Research Group/s: | Materiales Carbonosos y Medio Ambiente |
Center, Department or Service: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Keywords: | Copper-ceria-zirconia | CO-PROX | STEM-XEDS | Copper dispersion | H2 chemisorption |
Knowledge Area: | Química Inorgánica |
Issue Date: | 28-Oct-2021 |
Publisher: | Elsevier |
Citation: | Applied Surface Science. 2022, 575: 151717. https://doi.org/10.1016/j.apsusc.2021.151717 |
Abstract: | The preferential oxidation of CO in H2-rich mixtures has been studied using Ce0.8Zr0.2O2-supported Cu catalysts containing increasing amounts of copper [1 wt% (Cu1/CZ), 2 wt% (Cu2/CZ) and 4 wt% (Cu4/CZ)]. The oxide support was prepared by co-precipitation and the copper was incorporated using the wetness impregnation method. The catalysts were characterized using N2 adsorption, XRD, STEM-XEDS, H2-TPR, H2 chemisorption and XPS techniques. In particular, the complementarity of electron microscopy and hydrogen chemisorption techniques was found to be very useful for elucidating one of the most challenging properties of copper catalysts, namely their dispersion. The results show that the Cu1/CZ catalyst is the most active in the CO-PROX reaction at low temperatures (<125 °C), despite having a lower copper content. The results are discussed and correlated with the textural properties of the catalysts and with parameters such as metal dispersion and the binary interfacial active sites. |
Sponsor: | The authors gratefully acknowledge financial support from the Generalitat Valenciana (PROMETEO/2018/076 project), the Spanish Ministry of Science and Innovation (PID2019-105542RB-I00 and MAT2017-87579-R projects) and UE-FEDER. J.C. Martínez-Munuera also acknowledges the Spanish Ministry of Science and Innovation for financial support through an FPU grant (FPU17/00603). |
URI: | http://hdl.handle.net/10045/119153 |
ISSN: | 0169-4332 (Print) | 1873-5584 (Online) |
DOI: | 10.1016/j.apsusc.2021.151717 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | © 2021 Published by Elsevier B.V. |
Peer Review: | si |
Publisher version: | https://doi.org/10.1016/j.apsusc.2021.151717 |
Appears in Collections: | INV - MCMA - Artículos de Revistas |
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Martinez-Munuera_etal_2022_ApplSurfaceSci_final.pdf | Versión final (acceso restringido) | 4,77 MB | Adobe PDF | Open Request a copy |
Martinez-Munuera_etal_2022_ApplSurfaceSci_accepted.pdf | Accepted Manuscript (acceso abierto) | 4,8 MB | Adobe PDF | Open Preview |
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