Publication detail

Anodic TiO2 nanotubes decorated by Pt nanoparticles using ALD: An efficient electrocatalyst for methanol oxidation

ANITHA, V. ZAZPE MENDIOROZ, R. KRBAL, M. YOO, J. SOPHA, H. PŘIKRYL, J. CHA, G. ŠLANG, S. SCHMUKI, P. MACÁK, J.

Original Title

Anodic TiO2 nanotubes decorated by Pt nanoparticles using ALD: An efficient electrocatalyst for methanol oxidation

Type

journal article in Web of Science

Language

English

Original Abstract

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

Keywords

TiO2 nanotubes Pt nanoparticles Atomic layer deposition Electrocatalysis Methanol electrooxidation

Authors

ANITHA, V.; ZAZPE MENDIOROZ, R.; KRBAL, M.; YOO, J.; SOPHA, H.; PŘIKRYL, J.; CHA, G.; ŠLANG, S.; SCHMUKI, P.; MACÁK, J.

Released

1. 9. 2018

ISBN

0021-9517

Periodical

JOURNAL OF CATALYSIS

Year of study

365

Number

1

State

United States of America

Pages from

86

Pages to

93

Pages count

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"
}