Pt monolayer shell on hollow Pd core electrocatalysts: scale up synthesis, structure, and activity for the oxygen reduction reaction

被引：3

作者：

Vukmirovic, Miomir B. ^{[1
]}

Zhang, Yu ^{[1
]}

Wang, Jia X. ^{[1
]}

Buceta, David ^{[1
]}

Wu, Lijun ^{[2
]}

Adzic, Radoslav R. ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA

[2] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

来源：

JOURNAL OF THE SERBIAN CHEMICAL SOCIETY | 2013年 / 78卷 / 12期

关键词：

platinum overlayer; electrocatalysis; fuel cells; surface strain; O-2; REDUCTION; CATALYTIC-ACTIVITY; PLATINUM;

D O I：

10.2298/JSC131024117V

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The synthesis, characterization and kinetics of the oxygen reduction reaction (ORR) of a Pt monolayer shell on Pd(hollow), or Pd-Au(hollow) core electrocatalysts are reported. Comparisons between the ORR catalytic activity of the electrocatalysts with hollow cores and those of Pt solid and Pt hollow nanoparticles were obtained using the rotating disk electrode technique. Hollow nanopartieles were made using Ni or Cu nanoparticles as sacrificial templates. The Pt ORR specific and mass activities of the electrocatalysts with hollow cores were found to be considerably higher than those of the electrocatalysts with solid cores. This enhanced Pt activity is attributed to the smooth surface morphology and hollow-induced lattice contraction. In addition, the hollow particles have a mass-saving geometry.

引用

页码：1983 / 1992

页数：10

共 20 条

[1] Adzic R, 1998, FRONT ELECT, P197
[2] Platinum monolayer fuel cell electrocatalysts
Adzic, R. R.
Zhang, J.
Sasaki, K.
Vukmirovic, M. B.
Shao, M.
Wang, J. X.
Nilekar, A. U.
Mavrikakis, M.
Valerio, J. A.
Uribe, F.
[J]. TOPICS IN CATALYSIS, 2007, 46 (3-4) : 249 - 262
[3] Bard A. J., 1985, STANDARD POTENTIALS
[4] Metal monolayer deposition by replacement of metal adlayers on electrode surfaces
Brankovic, SR
Wang, JX
Adzic, RR
[J]. SURFACE SCIENCE, 2001, 474 (1-3) : L173 - L179
[5] Electronic structure and catalysis on metal surfaces
Greeley, J
Norskov, JK
Mavrikakis, M
[J]. ANNUAL REVIEW OF PHYSICAL CHEMISTRY, 2002, 53 : 319 - 348
[6] Hammer B, 2000, ADV CATAL, V45, P71
[7] Oxygen Reduction Reaction on Platinum-Terminated "Onion-structured" Alloy Catalysts
Herron, Jeffrey A.
Jiao, Jiao
Hahn, Konstanze
Peng, Guowen
Adzic, Radoslav R.
Mavrikakis, Manos
[J]. ELECTROCATALYSIS, 2012, 3 (3-4) : 192 - 202
[8] Pt monolayer electrocatalysts for O2 reduction:: PdCo/C substrate-induced activity in alkaline media
Lima, F. H. B.
Zhang, J.
Shao, M. H.
Sasaki, K.
Vukmirovic, M. B.
Ticianelli, E. A.
Adzic, R. R.
[J]. JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 2008, 12 (04) : 399 - 407
[9] Catalytic activity-d-band center correlation for the O2 reduction reaction on platinum in alkaline solutions
Lima, F. H. B.
Zhang, J.
Shao, M. H.
Sasaki, K.
Vukmirovic, M. B.
Ticianelli, E. A.
Adzic, R. R.
[J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (01) : 404 - 410
[10] Masel R. I., 1996, PRINCIPLES ADSORPTIO, P702

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