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ANITHA, V. ZAZPE MENDIOROZ, R. KRBAL, M. YOO, J. SOPHA, H. PŘIKRYL, J. CHA, G. ŠLANG, S. SCHMUKI, P. MACÁK, J.
Originální název
Anodic TiO2 nanotubes decorated by Pt nanoparticles using ALD: An efficient electrocatalyst for methanol oxidation
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
Anodic TiO2 nanotube layers (TNTs) of different thicknesses (approximate to 1, 5 and 20 mu m) were homogeneously decorated with Pt nanoparticles using atomic layer deposition (ALD) and explored for the electrocatalytic activity in methanol oxidation reaction (MOR). Six different numbers of ALD cycles (N-ALD) - 24, 40, 56, 72, 88 and 104 - were used. Pt nanoparticles with diameter in the range of 1.3-4.6 nm were obtained for the first five N-ALD) and a complete coating was achieved for the highest N-ALD) (1 04). The SEM/TEM analyses revealed that Pt nanoparticles uniformly decorated exteriors and interiors of TNTs. A linear increase of the particle diameter of Pt was observed with increasing N-ALD). Highest electrocatalytic activities of Pt/TNTs electrodes represented by current density of 74 mA/cm(2) were obtained for N-ALD) = 88 and for thickest TNTs (20 mu m). The electrooxidation performance of Pt-decorated TiO2 nanotube layers was thoroughly compared to reference substrates: Pt-decorated graphite sheets and TiO2 flat layers (on annealed Ti foils) as well as for a commercial Pt/C catalyst attached on graphite sheets. From chronoamperometric measurements it turned out that the catalytic activity of Pt-loaded nanotube layers is superior and long lasting compared to other substrates, where significant degree of catalyst poisoning takes place. The presented ALD decoration approach is an effective strategy for the homogeneous distribution of precious Pt nanoparticles on a high surface area catalyst support for high-performance electrocatalysis
Klíčová slova
TiO2 nanotubes Pt nanoparticles Atomic layer deposition Electrocatalysis Methanol electrooxidation
Autoři
ANITHA, V.; ZAZPE MENDIOROZ, R.; KRBAL, M.; YOO, J.; SOPHA, H.; PŘIKRYL, J.; CHA, G.; ŠLANG, S.; SCHMUKI, P.; MACÁK, J.
Vydáno
1. 9. 2018
ISSN
0021-9517
Periodikum
JOURNAL OF CATALYSIS
Ročník
365
Číslo
1
Stát
Spojené státy americké
Strany od
86
Strany do
93
Strany počet
8
URL
https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S0021951718302392
BibTex
@article{BUT150250, author="V.C. {Anitha} and Raúl {Zazpe Mendioroz} and Miloš {Krbal} and JeongEun {Yoo} and Hanna Ingrid {Sopha} and Jan {Přikryl} and Gihoon {Cha} and Stanislav {Šlang} and Patrik {Schmuki} and Jan {Macák}", title="Anodic TiO2 nanotubes decorated by Pt nanoparticles using ALD: An efficient electrocatalyst for methanol oxidation", journal="JOURNAL OF CATALYSIS", year="2018", volume="365", number="1", pages="86--93", doi="10.1016/j.jcat.2018.06.017", issn="0021-9517", url="https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S0021951718302392" }