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

[1] Development of supported bifunctional electrocatalysts for unitized regenerative fuel cells [J].

Chen, GY ;

Bare, SR ;

Mallouk, TE .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (08) :A1092-A1099

[2] Ex situ evaluation of tungsten oxide as a catalyst support for PEMFCs [J].

Chhina, H. ;

Campbell, S. ;

Kesler, O. .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2007, 154 (06) :B533-B539

[3] Thermal and electrochemical stability of tungsten carbide catalyst supports [J].

Chhina, H. ;

Campbell, S. ;

Kesler, O. .

JOURNAL OF POWER SOURCES, 2007, 164 (02) :431-440

[4] An oxidation-resistant indium tin oxide catalyst support for proton exchange membrane fuel cells [J].

Chhina, H. ;

Campbell, S. ;

Kesler, O. .

JOURNAL OF POWER SOURCES, 2006, 161 (02) :893-900

[5] Preparation and characterization of Nb-doped TiO2 nanoparticles used as a conductive support for bifunctional CuCo2O4 electrocatalyst [J].

De Koninck, Mathieu ;

Manseau, Pierre ;

Marsan, Benoit .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2007, 611 (1-2) :67-79

[6] Low-temperature synthesis of a PtRu/Nb0.1Ti0.9O2 electrocatalyst for methanol oxidation [J].

Garcia, Brenda L. ;

Fuentes, Roderick ;

Weidner, John W. .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2007, 10 (07) :B108-B110

[7] The interaction of rutile (TiO2) surface with some catalytically active transition metal oxides during heating, studied by electrochemical methods [J].

Haber, J ;

Nowak, P .

TOPICS IN CATALYSIS, 1999, 8 (3-4) :199-209

[8] Sub-stoichiometric titanium oxide-supported platinum electrocatalyst for polymer electrolyte fuel cells [J].

Ioroi, T ;

Siroma, Z ;

Fujiwara, N ;

Yamazaki, S ;

Yasuda, K .

ELECTROCHEMISTRY COMMUNICATIONS, 2005, 7 (02) :183-188

[9] Stability of corrosion-resistant magneli-phase Ti4O7-supported PEMFC catalysts at high potentials [J].

Ioroi, Tsutomu ;

Senoh, Hiroshi ;

Yamazaki, Shin-Ichi ;

Siroma, Zyun ;

Fujiwara, Naoko ;

Yasuda, Kazuaki .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2008, 155 (04) :B321-B326

[10] Nanoscopic observation of strong chemical interaction between Pt and tin oxide [J].

Kamiuchi, Naoto ;

Matsui, Toshiaki ;

Kikuchi, Ryuji ;

Eguchi, Koichi .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (44) :16470-16476

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