Identification and localization of Pt species in Pt-NaA zeolite catalysts prepared by direct synthesis

Several characterization techniques were employed to elucidate the Pt species present in the structure of Pt-NaA catalysts. Three types of Pt particles were identified: nanoparticles located at the surface of the crystals (with a higher size and flattened form), 1–2 nm particles inside the structure, and sub-nanometric particles, lower than 1 nm, confined in the pores. The low Pt–Pt coordination number (EXAFS) is compatible with both flattened dihedral-like morphology, as well as the presence of sub-nanometric particles. The Pt0.6_NaA catalyst exhibited higher activity (in the WGS) than the other catalysts, which could be related to the presence of small particles.

Palabras clave: DIRECT SYNTHESIS , PT SPECIES , WATER GAS SHIFT REACTION

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Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)

Identificadores

URI: http://hdl.handle.net/11336/208987

DOI: http://dx.doi.org/10.1016/j.catcom.2022.106558

URL: https://www.sciencedirect.com/science/article/pii/S1566736722001637

Colecciones

Articulos (UE-INN - NODO BARILOCHE)
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO BARILOCHE

Articulos(INCAPE)
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"

Articulos(INIFTA)
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.

Citación

Martinez Galeano, Yohana; Mizrahi, Martin Daniel; Ramallo Lopez, Jose Martin; Moreno, Mario Sergio Jesus; Cornaglia, Laura Maria; et al.; Identification and localization of Pt species in Pt-NaA zeolite catalysts prepared by direct synthesis; Elsevier Science; Catalysis Communications; 172; 106558; 12-2022; 1-12

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