期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 42, 期 36, 页码 22796-22804出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2017.07.138
关键词
Pulsed laser deposition; Planar deposition; Titanium dioxide; Nanostructured TiO2/Pt; electrocatalyst; Ethanol oxidation reaction; Direct ethanol fuel cells
资金
- Natural Sciences Engineering Research Council of Canada (NSERC)
- Centre Quebecois sur les Materiaux Fonctionnels (CQMF)
- China Scholarship Council
Titanium dioxide is emerging as new class of catalyst support for fuel cell reactions. Via pulsed laser deposition, we prepare hierarchically organized and vertically aligned TiO2/Pt nanostructured films on microfibrous carbon paper (CP) substrate at room temperature. Microstructural analyses reveal a metal-support interaction between TiO2 and Pt. Namely; (i) the particles size of Pt on TiO2 is smaller than those of Pt grown onto carbon paper substrate under similar condition of synthesis and (ii) Pt metallic state is transformed to ionized Pt2+ and Pt4+. Compared to CP/Pt electrocatalyst, the CP/TiO2/Pt electrocatalysts (i) oxidize ethanol at much lower potentials, (ii) display superior current peak densities of more than 2.5 times higher by voltammetry, and (iii) steady state current density during long-term stability up to 8 times greater. For portable electronic applications, the binder free and hierarchical structures of the CP/TiO2/Pt electrocatalyst with its planar deposition make it very attractive as anode for direct ethanol fuel cells. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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