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

被引：84

作者：

Garcia, Brenda L. ^{[1
]}

Fuentes, Roderick ^{[1
]}

Weidner, John W. ^{[1
]}

机构：

[1] Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2007年 / 10卷 / 07期

关键词：

Electric conductivity - Low temperature operations - Methanol - Oxidation - Platinum compounds - Sol-gel process - Synthesis (chemical);

D O I：

10.1149/1.2732074

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Niobium was doped into anatase TiO2 support at 10 mol % (Nb0.1Ti0.9O2) using sol-gel chemistry. A PtRu/Nb0.1Ti0.9O2 catalyst was synthesized by LiBH4 reduction in tetrahydrofuran. The methanol electro-oxidation activity of the catalyst shows that this oxide support was electrically conductive. The current (A/g(Pt)) was 6% higher on the PtRu/Nb0.1Ti0.9O2 catalyst compared to a commercial PtRu/C catalyst at 25 degrees C. The electrochemically active surface area of the PtRu/C was 94% higher than PtRu/Nb0.1Ti0.9O2, thus the current per active site was 100% higher on PtRu/Nb0.1Ti0.9O2. A membrane electrode assembly with PtRu/Nb0.1Ti0.9O2 had 46% higher current (A/g(Pt)) than an equivalent E-TEK membrane electrode assembly at 70 degrees C. (c) 2007 The Electrochemical Society.

引用

页码：B108 / B110

页数：3

共 8 条

[1] Effects of Nb doping on the TiO2 anatase-to-rutile phase transition [J].

Arbiol, J ;

Cerdà, J ;

Dezanneau, G ;

Cirera, A ;

Peiró, F ;

Cornet, A ;

Morante, JR .

JOURNAL OF APPLIED PHYSICS, 2002, 92 (02) :853-861

[2] 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

[3] The surface science of titanium dioxide [J].

Diebold, U .

SURFACE SCIENCE REPORTS, 2003, 48 (5-8) :53-229

[4] 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

[5] Photoemission and STM study of the electronic structure of Nb-doped TiO2 [J].

Morris, D ;

Dou, Y ;

Rebane, J ;

Mitchell, CEJ ;

Egdell, RG ;

Law, DSL ;

Vittadini, A ;

Casarin, M .

PHYSICAL REVIEW B, 2000, 61 (20) :13445-13457

[6] Electrocatalytic corrosion of carbon support in PEMFC cathodes [J].

Roen, LM ;

Paik, CH ;

Jarvic, TD .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2004, 7 (01) :A19-A22

[7]

WILSON MS, 1993, Patent No. 5211984

[8] Preparation, characterization and photocatalytic activity of TiO2 formed from a mesoporous precursor [J].

Yan, X ;

He, J ;

Evans, DG ;

Zhu, Y ;

Duan, X .

JOURNAL OF POROUS MATERIALS, 2004, 11 (03) :131-139

← 1 →