RT Journal Article
T1 Influence of the calcination temperature on the activity of hydroxyapatite-supported palladium catalyst in the methane oxidation reaction
A1 Boukha, Zouhair
A1 Choya, Andoni
A1 Cortés-Reyes, Marina
A1 de Rivas, Beatriz
A1 Alemany-Arrebola, Luis José
A1 González-Velasco, Juan Ramón
A1 Gutiérrez-Ortiz, José I.
A1 López-Fonseca, Rubén
K1 Catalizadores
K1 Gas natural
AB 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.
PB Elsevier
YR 2020
FD 2020
LK https://hdl.handle.net/10630/44923
UL https://hdl.handle.net/10630/44923
LA eng
NO 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
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 28 feb 2026