2026-05-27T05:30:12Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/449232026-01-28T00:46:45Zcom_10630_2254col_10630_37953
RIUMA. Repositorio Institucional de la Universidad de Málaga
author
Boukha, Zouhair
author
Choya, Andoni
author
Cortés-Reyes, Marina
author
de Rivas, Beatriz
author
Alemany-Arrebola, Luis José
author
González-Velasco, Juan Ramón
author
Gutiérrez-Ortiz, José I.
author
López-Fonseca, Rubén
2026-01-27T08:00:12Z
2020
Z. Boukha, A. Choya, M. Cortés-Reyes, B. de Rivas, L.J. Alemany, J.R. González-Velasco, J.I. Gutiérrez-Ortiz, R. López-Fonseca, Influence of the calcination temperature on the activity of hydroxyapatite-supported palladium catalyst in methane oxidation reaction, Applied Catalysis B: Environmental 277 (2020) 119280
https://hdl.handle.net/10630/44923
10.1016/j.apcatb.2020.119280
In the present study, a series of four hydroxyapatite (HAP) supported palladium samples, with a Pd loading close to 0.5 %, obtained through their calcination at 773, 873, 973, or 1073 K has been investigated. These samples have been characterized using a wide battery of complementary techniques. From these studies, it was found that the rise of the calcination temperature induces a progressive dehydroxylation of the support and a structure evolution of the species containing Pd2+, from tetrahedral (Td) to square planar geometry (D4h). Moreover, this enhances markedly the metal-support interactions. For instance, at the highest temperature (1073 K), Pd particles were found encapsulated by a thin support layer. Consequently, two distinct reducible species have been identified; one of them manifests SMSI. This increase in the Pd-HAP interaction strength seems to (i) expand the HAP lattice, (ii) change the Pd2+ coordination from Td to D4h geometry, (iii) promote PdO reduction and (iv) suppress CO chemisorption. These entire properties do compensate the poor textural properties and benefit the efficiency and stability of the Pd active phase in methane oxidation reaction.
eng
Attribution-NonCommercial-NoDerivatives 4.0 International
Catalizadores
Gas natural
Influence of the calcination temperature on the activity of hydroxyapatite-supported palladium catalyst in the methane oxidation reaction
journal article
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URL
https://riuma.uma.es/bitstreams/d57ec65d-ec0d-4a58-b1ca-7692d2735e19/download
File
MD5
f4c33195cbc9996b3348ed25c4d7dcd9
2672212
application/pdf
APCATB-D-20-119280(Revised Manuscript).pdf