Controlled modification of nanoporous gold: Chemical vapor deposition of TiO2 in ultrahigh vacuum

被引：8

作者：

Schaefer, A. ^{[1
]}

Ragazzon, D. ^{[2
]}

Walle, L. E. ^{[3
]}

Farstad, M. H. ^{[3
]}

Wichmann, A. ^{[1
]}

Baeumer, M. ^{[1
]}

Borg, A. ^{[3
]}

Sandell, A. ^{[2
]}

机构：

[1] Univ Bremen, Inst Appl & Phys Chem, D-28359 Bremen, Germany

[2] Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden

[3] Norwegian Univ Sci & Technol, Dept Phys, NO-7491 Trondheim, Norway

来源：

APPLIED SURFACE SCIENCE | 2013年 / 282卷

关键词：

Nanoporous gold; Titania; Chemical vapor deposition; Heterogeneous catalysis; Ultrahigh vacuum; TITANIUM-DIOXIDE; CATALYTIC-ACTIVITY; SURFACE-CHEMISTRY; STABILITY; OXIDATION; METHANOL; AU;

D O I：

10.1016/j.apsusc.2013.05.148

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：

TiO2 has been deposited in the first 400 nm of a nanoporous gold (NPG) structure using metal organic chemical vapor deposition with titanium-tetraisopropoxide as single source precursor in ultra high vacuum. The NPG has been pretreated by ozone to clean and stabilize the structure for deposition. The deposited oxide stabilizes the porous structure, otherwise prone to coarsening at elevated temperatures, up to 300 degrees C. The study combines the controlled sample preparation with a functional test of the prepared catalyst under real conditions in a continuous gas flow reactor. The catalytic activity of the loaded NPG at 60 degrees C for CO oxidation is found to be superior to unloaded as-prepared NPG. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：439 / 443

页数：5

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