Methanol tolerance of Pd-Co oxygen reduction reaction electrocatalysts using scanning electrochemical microscopy

被引：33

作者：

Lin, Cheng-Lan ^{[1
]}

Sanchez-Sanchez, Carlos M. ^{[1
]}

Bard, Allen J. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Chem & Biochem, Ctr Electrochem, Austin, TX 78712 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2008年 / 11卷 / 08期

关键词：

D O I：

10.1149/1.2931020

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Bimetallic Pd-Co and pure Pt electrocatalysts were evaluated for tolerance to methanol in the oxygen reduction reaction (ORR) in 0.5 M H2SO4 using the tip generation-substrate collection mode of scanning electrochemical microscopy. The Pd-Co electrocatalyst, Pd80Co20 (80% Pd, 20% Co), showed the highest ORR activity among the different Pd-Co compositions, both in the absence and presence of MeOH. The ORR collection efficiency of the electrocatalysts in electrolytes containing various MeOH concentrations were measured and compared, with the Pd80Co20 electrocatalyst showing better tolerance toward MeOH poisoning during ORR than Pt electrocatalysts, especially at high MeOH concentrations.

引用

页码：B136 / B139

页数：4

共 17 条

[1] Recent advances in fuel cell technology and its applications [J].

Acres, GJK .

JOURNAL OF POWER SOURCES, 2001, 100 (1-2) :60-66

[2]

Aricò AS, 2001, FUEL CELLS, V1, P133

[3]

Bard A.J., 2001, Scanning Electrochemical Microscopy

[4] Oxygen reduction at Pt and Pt70Ni30 in H2SO4/CH3OH solution [J].

Drillet, JF ;

Ee, A ;

Friedemann, J ;

Kötz, R ;

Schnyder, B ;

Schmidt, VM .

ELECTROCHIMICA ACTA, 2002, 47 (12) :1983-1988

[5] Thermodynamic guidelines for the design of bimetallic catalysts for oxygen electroreduction and rapid screening by scanning electrochemical microscopy.: M-Co (M: Pd, Ag, Au) [J].

Fernández, JL ;

Walsh, DA ;

Bard, AJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (01) :357-365

[6] Scanning electrochemical microscopy 50.: Kinetic study of electrode reactions by the tip generation-substrate collection mode [J].

Fernández, JL ;

Bard, AJ .

ANALYTICAL CHEMISTRY, 2004, 76 (08) :2281-2289

[7] Scanning electrochemical microscopy.: 47.: Imaging electrocatalytic activity for oxygen reduction in an acidic medium by the tip generation-substrate collection mode [J].

Fernández, JL ;

Bard, AJ .

ANALYTICAL CHEMISTRY, 2003, 75 (13) :2967-2974

[8] Characterization and theory of electrocatalysts based on scanning electrochemical microscopy screening methods [J].

Fernandez, Jose L. ;

White, J. Michael ;

Sun, Yangming ;

Tang, Wenjie ;

Henkelman, Graeme ;

Bard, Allen J. .

LANGMUIR, 2006, 22 (25) :10426-10431

[9] Size- and support-dependency in the catalysis of gold [J].

Haruta, M .

CATALYSIS TODAY, 1997, 36 (01) :153-166

[10] IrxCo1-x (x=0.3-1.0) alloy electrocatalysts, catalytic activities, and methanol tolerance in oxygen reduction reaction [J].

Lee, Kunchan ;

Zhang, Lei ;

Zhang, Jiujun .

JOURNAL OF POWER SOURCES, 2007, 170 (02) :291-296

← 1 2 →