Methanol oxidation on sputter-coated platinum oxide catalysts
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10334060" target="_blank" >RIV/00216208:11320/16:10334060 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9XMuHn2CFI" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9XMuHn2CFI</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijhydene.2015.09.147" target="_blank" >10.1016/j.ijhydene.2015.09.147</a>
Alternative languages
Result language
angličtina
Original language name
Methanol oxidation on sputter-coated platinum oxide catalysts
Original language description
Platinum oxide (PtOx) and metallic platinum (Pt) layers deposited by means of radio frequency (rf) magnetron sputtering were examined as potential catalysts for partial oxidation of methanol (POM) reaction (CH3OH + 1/2O(2)-> 2H(2) + CO2) under realistic conditions. Flat Si(100) support and oxygen-plasma etched amorphous carbon films (a-C) were used as substrates for PtOx. Elemental composition and morphology of the catalysts were characterized by x-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). XPS analysis of PtOx demonstrates change in its chemical state during the reaction leading to metallic layer with small amounts of stable Pt2+ cations which turns out to be crucial for its catalytic properties, while SEM reveals significant cracking and roughening of the oxide thin films. A reference Pt/Si catalyst, on the contrary, shows" no significant differences prior and after the methanol oxidation reaction but lacks to PtOx in both activity (in terms of H-2 production rate) and selectivity for POM, generating relatively high amounts of CO which can poison the catalyst surface. PtOx deposited on the porous a-C outperforms the same oxide grown directly on Si, especially in its POM selectivity exceeding 90%. Both oxidic systems, however, require an initial conditioning under real reaction conditions to reach their optimal catalytic capability. (C) Copyright 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Hydrogen Energy
ISSN
0360-3199
e-ISSN
—
Volume of the periodical
41
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
265-275
UT code for WoS article
000368955300027
EID of the result in the Scopus database
2-s2.0-84954553033