Differences in catalytic properties between mesoporous and nanoparticulate platinum
Journal article, 2007
Conventional Pt/Al2O3 catalysts prepared by wet-impregnation are composed of Pt nanoparticles exposing convex and facetted surfaces deposited on high-surface area gamma-Al2O3 supports. A hexagonal phase mesoporous Pt material (denoted H-1-Pt) prepared by chemical reduction in the aqueous domains of a lyotropic liquid crystalline template exposes however mainly a concave surface with expected different catalytic properties. A series of Pt/Al2O3 catalysts were prepared using H-1-Pt, Pt-black or wet-impregnated Pt, and the samples were characterized by SEM-EDX and TEM, and finally evaluated for CO oxidation. The H-1-Pt/Al2O3 catalyst showed an ignition profile for CO oxidation at lower temperatures and thus appeared less sensitive to CO poisoning than the two other types of samples. This difference may be related to the differences in surface curvature.
Author
Ali Saramat
Competence Centre for Catalysis (KCK)
Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry
Martin Andersson
Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry
Steve Hunt
University of Southampton
Peter Thormählen
Chalmers, Applied Physics, Chemical Physics
Competence Centre for Catalysis (KCK)
Magnus Skoglundh
Competence Centre for Catalysis (KCK)
Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry
George Attard
University of Southampton
Anders Palmqvist
Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry
Competence Centre for Catalysis (KCK)
European Physical Journal D
14346060 (ISSN) 14346079 (eISSN)
Vol. 43 1-3 209-211Driving Forces
Sustainable development
Areas of Advance
Nanoscience and Nanotechnology
Transport
Energy
Materials Science
Subject Categories
Chemical Engineering
Environmental Sciences
DOI
10.1140/epjd/e2007-00124-7