Nb-doped TiO2 as a support of Pt and Pt-Ru anode catalyst for PEMFCs

被引：66

作者：

Gojkovic, S. Lj. ^{[1
]}

Babic, B. M. ^{[2
]}

Radmilovic, V. R. ^{[3
]}

Krstajic, N. V. ^{[1
]}

机构：

[1] Univ Belgrade, Fac Technol & Met, Belgrade 11120, Serbia

[2] Vinca Inst Nucl Sci, Belgrade 11001, Serbia

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2010年 / 639卷 / 1-2期

关键词：

Oxide support; TiO2; Pt-Ru nanocatalyst; Methanol oxidation; Polymer electrolyte membrane fuel cell; PLATINUM; METHANOL; ELECTROOXIDATION; CO; ELECTROCATALYSTS; NANOPARTICLES; ELECTRODES; DEPOSITION; OXIDATION;

D O I：

10.1016/j.jelechem.2009.12.004

中图分类号：

O65 [分析化学];

学科分类号：

070302 [分析化学];

摘要：

TiO2 doped by 0.5% Nb was synthesized by the acid-catalyzed sol-gel method. BET surface area was determined to be 72 m(2) g(-1). XRD measurements showed that TiO2 has structure of anatase with similar to 13 nm average crystallite size. Using Nb-TiO2 as a support, Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 were prepared by borohydride reduction method. TEM imaging of Pt-Ru/Nb-TiO2 revealed rather uniform distribution of the metallic particles on the support with a mean diameter of 3.8 nm. According to XRD analysis, Pt-Ru particles consist of the solid solution of Ru in Pt (40 at.% Ru) and a small amount of RuO2. Cyclic voltammetry of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 indicated good conductivity of the supporting material. Oxidation of pre-adsorbed CO and methanol on Pt-Ru/Nb-TiO2 was faster than on Pt/Nb-TiO2. However, when the activities of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 for methanol oxidation were compared to those of Pt/XC-72 and Pt-Ru/XC-72, no significant difference was observed. This means that Nb-TiO2 is a promising replacement for high area carbon supports in PEMFC anodes, but without the influence on the reaction kinetics. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：161 / 166

页数：6

共 25 条

[1]

Formation of carbon-supported PtM alloys for low temperature fuel cells: a review [J].

Antolini, E .

MATERIALS CHEMISTRY AND PHYSICS, 2003, 78 (03) :563-573

[2]

Ceramic materials as supports for low-temperature fuel cell catalysts [J].

Antolini, E. ;

Gonzalez, E. R. .

SOLID STATE IONICS, 2009, 180 (9-10) :746-763

[3]

Carbon supports for low-temperature fuel cell catalysts [J].

Antolini, Ermete .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2009, 88 (1-2) :1-24

[4]

Effect of Pt-Ru alloy composition on high-temperature methanol electro-oxidation [J].

Aricò, AS ;

Antonucci, PL ;

Modica, E ;

Baglio, V ;

Kim, H ;

Antonucci, V .

ELECTROCHIMICA ACTA, 2002, 47 (22-23) :3723-3732

[5]

THE DETERMINATION OF PORE VOLUME AND AREA DISTRIBUTIONS IN POROUS SUBSTANCES .1. COMPUTATIONS FROM NITROGEN ISOTHERMS [J].

BARRETT, EP ;

JOYNER, LG ;

HALENDA, PP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1951, 73 (01) :373-380

[6]

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

[7]

CO monolayer oxidation at Pt nanoparticles supported on glassy carbon electrodes [J].

Cherstiouk, OV ;

Simonov, PA ;

Zaikovskii, VI ;

Savinova, ER .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2003, 554 :241-251

[8]

Comparisons of Ebonex® and graphite supports for platinum and nickel electrocatalysts [J].

Dieckmann, GR ;

Langer, SH .

ELECTROCHIMICA ACTA, 1998, 44 (2-3) :437-444

[9]

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

[10]

Stripping voltammetry of carbon monoxide oxidation on stepped platinum single-crystal electrodes in alkaline solution [J].

Garcia, Gonzalo ;

Koper, Marc T. M. .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2008, 10 (25) :3802-3811

← 1 2 3 →