Characterization and theory of electrocatalysts based on scanning electrochemical microscopy screening methods

被引：65

作者：

Fernandez, Jose L. ^{[1
]}

White, J. Michael ^{[1
]}

Sun, Yangming ^{[1
]}

Tang, Wenjie ^{[1
]}

Henkelman, Graeme ^{[1
]}

Bard, Allen J. ^{[1
]}

机构：

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

来源：

LANGMUIR | 2006年 / 22卷 / 25期

关键词：

D O I：

10.1021/la061164h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A strategy for finding new electrocatalysts for the oxygen reduction reaction (ORR) in acidic solutions is outlined and illustrated with results for Pd-Co catalysts. This is based on establishing guidelines for selecting test systems, rapid preparation of arrays, and rapid screening by scanning electrochemical microscopy. Promising candidates are further tested as supported electrocatalysts by larger scale electrochemical methods and in fuel cells, with optimization of the composition and structure. Those that emerge are characterized by a variety of methods, including X-ray diffraction, scanning electron microscopy, and X-ray photoemission spectroscopy. Finally, density functional theory is used for detailed calculations of oxygen adsorption and dissociation on the material and provides better guidelines for further testing.

引用

页码：10426 / 10431

页数：6

共 37 条

[1]

Adzic R, 1998, FRONT ELECT, P197

[2] O2 reduction and CO oxidation at the Pt-electrolyte interface.: The role of H2O and OH adsorption bond strengths [J].

Anderson, AB .

ELECTROCHIMICA ACTA, 2002, 47 (22-23) :3759-3763

[3] Electrocatalysis of oxygen reduction on a carbon supported platinum-vanadium alloy in polymer electrolyte fuel cells [J].

Antolini, E ;

Passos, RR ;

Ticianelli, EA .

ELECTROCHIMICA ACTA, 2002, 48 (03) :263-270

[4]

Aricò AS, 2001, FUEL CELLS, V1, P133

[5]

Bader R. F. W., 1990, ATOMS MOL QUANTUM TH, V22

[6] Adsorption of O, OH, and H2O on Pt-based bimetallic clusters alloyed with Co, Cr, and Ni [J].

Balbuena, PB ;

Altomare, D ;

Vadlamani, N ;

Bingi, S ;

Agapito, LA ;

Seminario, JM .

JOURNAL OF PHYSICAL CHEMISTRY A, 2004, 108 (30) :6378-6384

[7] The Bronsted-Evans-Polanyi relation and the volcano curve in heterogeneous catalysis [J].

Bligaard, T ;

Norskov, JK ;

Dahl, S ;

Matthiesen, J ;

Christensen, CH ;

Sehested, J .

JOURNAL OF CATALYSIS, 2004, 224 (01) :206-217

[8] PROJECTOR AUGMENTED-WAVE METHOD [J].

BLOCHL, PE .

PHYSICAL REVIEW B, 1994, 50 (24) :17953-17979

[9] Precursor-mediated adsorption of oxygen on the (111) surfaces of platinum-group metals [J].

Eichler, A ;

Mittendorfer, F ;

Hafner, J .

PHYSICAL REVIEW B, 2000, 62 (07) :4744-4755

[10] Pd-Ti and Pd-Co-Au electrocatalysts as a replacement for platinum for oxygen reduction in proton exchange membrane fuel cells [J].

Fernández, JL ;

Raghuveer, V ;

Manthiram, A ;

Bard, AJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (38) :13100-13101

← 1 2 3 4 →