Browse by author
Lookup NU author(s): Emeritus Professor Keith Scott
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
Niobium and tantalum doped TiO2 nanoparticles were prepared as catalyst substrates by an improved sol-gel method. Catalysts consisting of 20 wt.% Pt supported on these substrates were synthesised and studied for the methanol oxidation reaction (MOR) and the oxygen reduction reaction (ORR). The catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Results indicated that the support materials had an average particle size of 26 nm and that the dopants were evenly distributed in the TiO2. The catalysts were also investigated with a range of electrochemical analyses and benchmarked against pure TiO2 nanoparticles and carbon-supported Pt catalysts with the same composition. The samples showed dramatically better stability than the carbon-supported Pt catalysts in an accelerated degradation test (ADT) under various experimental conditions. The MOR activities of these samples were also increased due to the presence of oxide material substrates, which provide active sites at lower potentials. Thus, the Nb and Ta doped TiO2-supported Pt catalysts were found to be promising methanol oxidation catalysts in terms of their catalytic activity and stability.
Author(s): Liu XT, Wu X, Scott K
Publication type: Article
Publication status: Published
Journal: Catalysis Science & Technology
Year: 2014
Volume: 4
Issue: 11
Pages: 3891-3898
Print publication date: 01/11/2014
Online publication date: 29/05/2014
Acceptance date: 29/05/2014
ISSN (print): 2044-4753
ISSN (electronic): 2044-4761
Publisher: RSC Publications
URL: http://dx.doi.org/10.1039/c4cy00393d
DOI: 10.1039/c4cy00393d
Altmetrics provided by Altmetric
