Transmission Electron Microscope Observation of Pt Deposited on Nb-Doped Titania

被引：18

作者：

Chhina, H. ^{[1
,2
]}

Susac, D. ^{[3
]}

Campbell, S. ^{[1
]}

Kesler, O. ^{[2
]}

机构：

[1] Automot Fuel Cell Cooperat Corp, Burnaby, BC V5J 5J8, Canada

[2] Univ Toronto, Dept Mech & Ind Engn, Toronto, ON M5S 3G8, Canada

[3] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2009年 / 12卷 / 06期

关键词：

heat treatment; nanoparticles; platinum; reduction (chemical); transmission electron microscopy; CATALYST SUPPORT; OXIDE; ELECTROCATALYST; NANOPARTICLES; STABILITY; METHANOL;

D O I：

10.1149/1.3110028

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Pt nanoparticles supported on niobium (Nb)-doped titania (TiO2) were prepared using the alcohol reduction method. The 10 mol % Nb-doped TiO2 (10Nb-TiO2) was subjected to various heat-treatments. Depending on the heat-treatment either anatase or rutile 10Nb-TiO2 was produced. The change in Pt morphology when deposited on 10Nb-TiO2 supports that were treated under hydrogen at different temperatures was investigated by high-resolution transmission electron microscopy. Platinum particles deposited on rutile 10Nb-TiO2 and anatase 10Nb-TiO2 have distinctly different morphologies. Those deposited on anatase 10Nb-TiO2 are similar to Pt/C and are essentially spherical. Platinum particles on rutile 10Nb-TiO2, however, appear flattened, indicating a strong metal-support interaction.

引用

页码：B97 / B100

页数：4

共 22 条

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