Synchrotron radiation photoelectron spectroscopy study of metal-oxide thin film catalysts: Pt-CeO2 coated CNTs

被引：14

作者：

Matolinova, I. ^{[1
]}

Fiala, R. ^{[1
]}

Khalakhan, I. ^{[1
]}

Vorokhta, M. ^{[1
]}

Sofer, Z. ^{[2
]}

Yoshikawa, H. ^{[3
]}

Kobayashi, K. ^{[3
]}

Matolin, V. ^{[1
]}

机构：

[1] Charles Univ Prague, Fac Math & Phys, Dept Surface & Plasma Sci, CR-18000 Prague 8, Czech Republic

[2] Prague Inst Chem Technol, Dept Inorgan Chem, CR-16628 Prague 6, Czech Republic

[3] NIMS Beamline Stn SPring 8, Natl Inst Mat Sci, Sayo, Hyogo 6795148, Japan

来源：

APPLIED SURFACE SCIENCE | 2012年 / 258卷 / 06期

关键词：

Cerium oxide; Platinum; Magnetron sputtering; Hard X-ray photoelectron spectroscopy; MULTIWALLED CARBON NANOTUBES; MEMBRANE FUEL-CELLS; METHANOL OXIDATION; COMBUSTION METHOD; IONIC DISPERSION; CEO2; ELECTROCATALYSTS; NANOPARTICLES; ELECTRODES; REDUCTION;

D O I：

10.1016/j.apsusc.2011.02.119

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The interaction of Pt with CeO2 layers was investigated by using high resolution hard X-ray photoelectron spectroscopy. Pt doped CeO2 layers were deposited simultaneously by rf-magnetron sputtering on a SiO2/Si substrate and carbon nanotubes (CNTs) grown on a carbon diffusion layer of a polymer membrane fuel cell. In the case of the CNT support photoelectron spectra showed the formation of ionic platinum rich cerium oxide with Pt2+,(4+) species, and with the Pt2+/Pt4+ ratio strongly dependent on the amount of platinum. Ce reveals 4+/3+ mixed valent character with Ce3+ concentration increasing with Pt content. In the case of the SiO2/Si substrate the film revealed Ce4+ and Pt4+ species only. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：2161 / 2164

页数：4

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