期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 44, 页码 24533-24542出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b06056
关键词
atomic layer deposition; electrocatalysis; direct ethanol fuel cells; titanium dioxide; palladium; nanotubes; nanoparticles
资金
- France-Canada Research Fund
- Conseil Regional Provence-Alpes-Cote d'Azur
- CNRS
Palladium nanoparticles are grown on TiO2 nanotubes by atomic layer deposition (ALD), and the resulting three-dimensional nanostructured catalysts are studied for ethanol electrooxidation in alkaline media. The morphology, the crystal structure, and the chemical composition of the Pd particles are fully characterized using scanning and transmission electron microscopies, X-ray diffraction, and X-ray photoelectron spectroscopy. The characterization revealed that the deposition proceeds onto the entire surface of the TiO2 nanotubes leading to the formation of well-defined and highly dispersed Pd nanoparticles. The electrooxidation of ethanol on Pd clusters deposited on TiO2 nanotubes shows not only a direct correlation between the catalytic activity and the particle size but also a steep increase of the response due to the enhancement of the metal support interaction when the crystal structure of the TiO2 nanotubes is modified by annealing at 450 degrees C in air.
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