Jump to main content
Jump to site search

Issue 16, 2012
Previous Article Next Article

The irreversible formation of palladium carbide during hydrogenation of 1-pentyne over silica-supported palladium nanoparticles: in situ Pd K and L3 edge XAS

Author affiliations

Abstract

The catalytically active phase of silica-supported palladium catalysts in the selective and non-selective hydrogenation of 1-pentyne was determined using in situ X-ray absorption spectroscopy at the Pd K and L3 edges. Upon exposure to alkyne, a palladium carbide-like phase rapidly forms, which prevents hydrogen to diffuse into the bulk of the nano-sized particles. Both selective and non-selective hydrogenation occur over carbided particles. The palladium carbide-like phase is stable under reaction conditions and only partially decomposes under high hydrogen partial pressure. Non-selective hydrogenation to pentane is not indicative of hydride formation. The palladium carbide phase was detected in the EXAFS analysis and the K edge XANES showed representative features.

Graphical abstract: The irreversible formation of palladium carbide during hydrogenation of 1-pentyne over silica-supported palladium nanoparticles: in situ Pd K and L3 edge XAS

Back to tab navigation

Supplementary files

Publication details

The article was received on 21 Dec 2011, accepted on 27 Feb 2012 and first published on 28 Feb 2012


Article type: Paper
DOI: 10.1039/C2CP24068H
Citation: Phys. Chem. Chem. Phys., 2012,14, 5761-5768
  •   Request permissions

    The irreversible formation of palladium carbide during hydrogenation of 1-pentyne over silica-supported palladium nanoparticles: in situ Pd K and L3 edge XAS

    M. W. Tew, M. Nachtegaal, M. Janousch, T. Huthwelker and J. A. van Bokhoven, Phys. Chem. Chem. Phys., 2012, 14, 5761
    DOI: 10.1039/C2CP24068H

Search articles by author

Spotlight

Advertisements