Influence of particles alloying on the performances of Pt-Ru/CNT catalysts for selective hydrogenation

Teddy, J. and Falqui, A. and Corrias, A. and Carta, D. and Lecante, P. and Gerber, I. and Serp, P. (2011) Influence of particles alloying on the performances of Pt-Ru/CNT catalysts for selective hydrogenation. Journal of Catalysis, 278 (1). pp. 59-70. ISSN 0021-9517. (doi:https://doi.org/10.1016/j.jcat.2010.11.016) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1016/j.jcat.2010.11.016

Abstract

The influence of PtRu bimetallic particle size and composition on cinnamaldehyde selective hydrogenation has been investigated for the first time using well-defined catalysts based on carbon nanotubes support. Very high selectivity towards cinnamyl alcohol together with high activity have been obtained provided a high temperature treatment of the catalyst is performed. HRTEM, WAXS and EXAFS analyses permit us to conclude that the remarkable influence of this high temperature treatment on both activity and selectivity arises from different phenomena. First, a particle size and a structural effect have been evidence that permits to increase the selectivity. WAXS and EXAFS point the formation of alloyed PtRu nanoparticles. Second, the heat treatment allows the removal of oxygenated groups from CNT surface. This may increase the cinnamaldehyde adsorption capacity and decrease the activation barrier for diffusion of substrate and product on the CNT surface, thus contributing to an increase in the activity.

Item Type: Article
Uncontrolled keywords: Bimetallic catalysts, Carbon nanotubes, Platinum-ruthenium, Selective hydrogenation, Activation barriers, Adsorption capacities, Bimetallic catalysts, Bimetallic particles, Cinnamaldehyde, Cinnamyl alcohols, EXAFS, High activity, High selectivity, High temperature treatments, Platinum-ruthenium, Pt-Ru nanoparticles, Selective hydrogenation, Structural effect, Adsorption, Aldehydes, Carbon nanotubes, Hydrogenation, Platinum, Platinum alloys, Ruthenium, Catalyst selectivity
Subjects: Q Science > QC Physics > QC176.8.N35 Nanoscience, nanotechnology
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Anna Corrias
Date Deposited: 17 Dec 2014 11:43 UTC
Last Modified: 04 Dec 2017 12:34 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46208 (The current URI for this page, for reference purposes)
  • Depositors only (login required):