title: Atomic Layer Deposition of Pd Nanoparticles on TiO₂ Nanotubes for Ethanol Electrooxidation: Synthesis and Electrochemical Properties.
abstract: 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 °C in air.
authors.affiliation: Aix Marseille Université, CNRS, CINaM UMR 7325, 13288, Marseille, France.
authors.forename: Loïc
authors.initials: L
authors.lastname: Assaud
authors.affiliation: Department of Chemical and Biological Engineering, Center for Catalysis Research and Innovation, University of Ottawa , 161 Louis-Pasteur Street, Ottawa, Ontario K1N 6N5, Canada.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Brazeau
authors.affiliation: Aix Marseille Université, CNRS, CINaM UMR 7325, 13288, Marseille, France.
authors.forename: Maïssa K S
authors.initials: MK
authors.lastname: Barr
authors.affiliation: Aix Marseille Université, CNRS, CINaM UMR 7325, 13288, Marseille, France.
authors.forename: Margrit
authors.initials: M
authors.lastname: Hanbücken
authors.affiliation: Department of Chemical and Biological Engineering, Center for Catalysis Research and Innovation, University of Ottawa , 161 Louis-Pasteur Street, Ottawa, Ontario K1N 6N5, Canada.
authors.forename: Spyridon
authors.initials: S
authors.lastname: Ntais
authors.affiliation: Department of Chemical and Biological Engineering, Center for Catalysis Research and Innovation, University of Ottawa , 161 Louis-Pasteur Street, Ottawa, Ontario K1N 6N5, Canada.
authors.forename: Elena A
authors.initials: EA
authors.lastname: Baranova
authors.affiliation: Aix Marseille Université, CNRS, CINaM UMR 7325, 13288, Marseille, France.
authors.forename: Lionel
authors.initials: L
authors.lastname: Santinacci
keywords: atomic layer deposition; direct ethanol fuel cells; electrocatalysis; nanoparticles; nanotubes; palladium; titanium dioxide