Support effect on the catalytic activity of two-dimensional Pt nanoparticle arrays on oxide substrates

Title
Support effect on the catalytic activity of two-dimensional Pt nanoparticle arrays on oxide substrates
Authors
박다희김선미김상훈윤중열박정영
Keywords
CO oxidation; Pt nanoparticles; Arc plasma deposition; Sol-gel
Issue Date
2014-06
Publisher
Applied catalysis A, General
Citation
VOL 480, 25-33
Abstract
Strong metal–support interactions are an important issue in determining the catalytic activity of heterogeneous catalysis. Here, we investigated the effect of the support in two-dimensional Pt nanocatalysts on reducible metal oxide supports under CO oxidation. Several reducible metal oxide supports, including CeO2, Nb2O5, and TiO2 thin films, were prepared via the sol–gel technique. The Langmuir–Blodgett technique and arc plasma deposition (APD) process were employed to obtain Pt nanoparticle arrays with and without capping layers, respectively, on an oxide support. We found that reducible metal oxide supports have a uniform thickness and crystalline structure after annealing, and exhibit a bandgap of 3.4–4.2 eV. We tested the catalytic performance of CO oxidation over Pt nanoparticles supported on metal–oxide thin films under 40 torr CO and 100 torr O2. The catalytic activity of the Pt nanoparticles on oxide supports showed the general trend of CeO2 > Nb2O5 > TiO2 > SiO2 for both the colloidal and APD Pt nanoparticles. These results reveal a strong support effect on the catalytic activity of the two-dimensional Pt nanocatalysts on oxide substrates under CO oxidation, with possible applications of tuning catalytic activity by engineering metal–oxide interfaces.
URI
http://pubs.kist.re.kr/handle/201004/48090
ISSN
0926860X
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE