Preparation and Adsorption Properties of Pd Nanoparticles Supported on TiO2 Nanotubes

被引：20

作者：

Honciuc, Andrei ^{[1
]}

Laurin, Mathias ^{[1
]}

Albu, Sergiu ^{[2
]}

Amende, Max ^{[1
]}

Sobota, Marek ^{[1
]}

Lynch, Robert ^{[2
]}

Schmuki, Patrik ^{[2
]}

Libuda, Joerg ^{[1
,3
]}

机构：

[1] Univ Erlangen Nurnberg, Lehrstuhl Phys Chem 2, D-91058 Erlangen, Germany

[2] Univ Erlangen Nurnberg, Lehrstuhl Korros & Oberflachentech, D-91058 Erlangen, Germany

[3] Univ Erlangen Nurnberg, Erlangen Catalysis Resource Ctr, D-91058 Erlangen, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 47期

关键词：

SENSITIZED SOLAR-CELLS; CO ADSORPTION; MODEL CATALYSTS; IMPROVED EFFICIENCY; ULTRAHIGH-VACUUM; SURFACE SCIENCE; CARBON-MONOXIDE; PALLADIUM; OXIDATION; ARRAYS;

D O I：

10.1021/jp107791r

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：

Here we present preparation methods for a series of novel model heterogeneous catalysts consisting of Pd nanoparticles dispersed on self-organized TiO2 nanotube arrays (TiNTs). For a comprehensive comparative study of TiNTs' surface adsorption properties, different chemical and physical methods were employed for the deposition of the Pd nanoparticles: (i) e-beam deposition in high vacuum (HV) and (ii) in ultrahigh vacuum (UHV), (iii) impregnation, and (iv) metal precipitation. Following preparation, the Pd/TiNTs were exposed to several O-2 (oxidative) and CO (reductive) cleaning cycles at 500 K in UHV. After each cleaning cycle, the CO adsorption properties were systematically probed with time-resolved infrared reflection-adsorption spectroscopy to monitor the surface state of the catalyst. It is shown that clean and well-defined Pd/TiNT catalysts can be obtained, which are well suited for future adsorption and reactivity studies.

引用

页码：20146 / 20154

页数：9

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