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Open AccessArticle

Catalytic Performance of Ni/CeO2/X-ZrO2 (X = Ca, Y) Catalysts in the Aqueous-Phase Reforming of Methanol

1
Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Universidad de Cádiz, 11510 Puerto Real, Spain
2
IMEYMAT, Instituto de Microscopía Electrónica y Materiales, 11510 Puerto Real, Spain
3
Catalytic Processes and Materials group, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(11), 1582; https://doi.org/10.3390/nano9111582
Received: 3 October 2019 / Revised: 4 November 2019 / Accepted: 6 November 2019 / Published: 8 November 2019
(This article belongs to the Special Issue Application of New Nanoparticle Structures as Catalysts)
In this study, we reported on the effect of promoting Ni/ZrO2 catalysts with Ce, Ca (two different loadings), and Y for the aqueous-phase reforming (APR) of methanol. We mainly focused on the effect of the redox properties of ceria and the basicity provided by calcium or yttrium on the activity and selectivity of Ni in this reaction. A systematic characterization of the catalysts was performed using complementary methods such as XRD, XPS, TPR, CO2-TPD, H2 chemisorption, HAADF-STEM, and EDS-STEM. Our results reveal that the improvement in reducibility derived from the incorporation of Ce did not have a positive impact on catalytic behaviour thus contrasting with the results reported in the literature for other Ce-based catalytic compositions. On the contrary, the available Ni-metallic surface and the presence of weak basic sites derived from Ca incorporation seem to play a major role on the catalytic performance for APR of methanol. The best performance was found for a Ce-free catalyst with a molar Ca content of 4%. View Full-Text
Keywords: aqueous-phase reforming; nickel; ceria; zirconia; calcium; yttrium; methanol aqueous-phase reforming; nickel; ceria; zirconia; calcium; yttrium; methanol
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MDPI and ACS Style

Goma, D.; Delgado, J.J.; Lefferts, L.; Faria, J.; Calvino, J.J.; Cauqui, M.Á. Catalytic Performance of Ni/CeO2/X-ZrO2 (X = Ca, Y) Catalysts in the Aqueous-Phase Reforming of Methanol. Nanomaterials 2019, 9, 1582.

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