Activity Trends in the Propane Dehydrogenation Reaction Catalyzed by MIII Sites on an Amorphous SiO2 Model : A Theoretical Perspective
Praveen, C. S. (Inter University Centre for Nano Materials and Devices. Cochin University of Science and Technology)
Comas-Vives, Aleix (Universitat Autònoma de Barcelona. Departament de Química)

Date:	2021
Abstract:	One class of particularly active catalysts for the Propane Dehydrogenation (PDH) reaction are well-defined M(III) sites on amorphous SiO. In the present work, we focus on evaluating the catalytic trends of the PDH for four M(III) single-sites (Cr, Mo, Ga and In) on a realistic amorphous model of SiO using density functional theory-based calculations and the energetic span model. We considered a catalytic pathway spanned by three reaction steps taking place on selected M-O pair of the SiO model: σ-bond metathesis of propane on a M-O bond to form M-propyl and O-H group, a β-H transfer step forming M-H and propene, and the H-H coupling step producing H and regenerating the initial M-O bond. With the application of the energetic span model, we found that the calculated catalytic activity for Ga and Cr is comparable to the ones reported at the experimental level, enabling us to benchmark the model and the methodology used. Furthermore, results suggest that both In(III) and Mo(III) on SiO are potential active catalysts for PDH, provided they can be synthesized and are stable under PDH reaction conditions.
Grants:	Agencia Estatal de Investigación RyC-2016-19930 Agencia Estatal de Investigación PGC2018-100818-A-I00
Note:	Altres ajuts: acords transformatius de la UAB
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	MIII sites ; Lewis acidic sites ; Transition-metals ; Silica ; Propane dehydrogenation reaction ; Amorphous model
Published in:	Topics in Catalysis, Vol. 65, Issue 1-4 (February 2022) , p. 242-251, ISSN 1572-9028

DOI: 10.1007/s11244-021-01535-9

10 p, 2.2 MB

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