Synthesis and characterization of platinum monolayer oxygen-reduction electrocatalysts with Co-Pd core-shell nanoparticle supports

被引：163

作者：

Shao, Minhua ^{[1
]}

Sasaki, Kotaro ^{[1
]}

Marinkovic, Nebojsa S. ^{[2
]}

Zhang, Lihua ^{[3
]}

Adzic, Radoslav R. ^{[1
]}

机构：

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

[2] Univ Delaware, Catalysis Res Ctr, Newark, DE 19716 USA

[3] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2007年 / 9卷 / 12期

关键词：

oxygen-reduction; platinum; palladium; cobalt; alloy; XANES; EXAFS;

D O I：

10.1016/j.elecom.2007.10.009

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We synthesized Pt monolayer electrocatalysts for oxygen-reduction using a new method to obtain the supporting core-shell nanoparticles. They consist of a Pt monolayer deposited on carbon-supported Co-Pd core-shell nanoparticles with the diameter of 3-4 nm. The nanoparticles were made using a redox-transmetalation (electroless deposition) method involving the oxidation of Co by Pd cations, yielding a Pd shell around the Co core. The quality of the thus-formed core-shell structure was verified using transmission electron microscopy and X-ray absorption spectroscopy, while cyclic voltammetry was employed to confirm the lack of Co oxidation (dissolution). A Pt monolayer was deposited on the Co-Pd core-shell nanoparticles by the galvanic displacement of a Cu monolayer obtained by underpotential deposition. The total noble metal mass-specific activity of this Pt monolayer electrocatalyst was ca. 3-fold higher than that of commercial Pt/C electrocatalysts. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：2848 / 2853

页数：6

共 31 条

[1] Adzic R, 1998, FRONT ELECT, P197
[2] Facile synthesis of gold-silver nanocages with controllable pores on the surface
Chen, Jingyi
McLellan, Joseph M.
Siekkinen, Andrew
Xiong, Yujie
Li, Zhi-Yuan
Xia, Younan
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (46) : 14776 - 14777
[3] Gold-coated iron nanoparticles for biomedical applications
Chen, M
Yamamuro, S
Farrell, D
Majetich, SA
[J]. JOURNAL OF APPLIED PHYSICS, 2003, 93 (10) : 7551 - 7553
[4] Alternative energy technologies
Dresselhaus, MS
Thomas, IL
[J]. NATURE, 2001, 414 (6861) : 332 - 337
[5] Pd-Ti and Pd-Co-Au electrocatalysts as a replacement for platinum for oxygen reduction in proton exchange membrane fuel cells
Fernández, JL
Raghuveer, V
Manthiram, A
Bard, AJ
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (38) : 13100 - 13101
[6] Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCs
Gasteiger, HA
Kocha, SS
Sompalli, B
Wagner, FT
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 56 (1-2) : 9 - 35
[7] Displacement synthesis of Cu shells surrounding Co nanoparticles
Guo, ZH
Kumar, CSSR
Henry, LL
Doomes, EE
Hormes, J
Podlaha, EJ
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (01) : D1 - D5
[8] Modification of the surface electronic and chemical properties of Pt(111) by subsurface 3d transition metals
Kitchin, JR
Norskov, JK
Barteau, MA
Chen, JG
[J]. JOURNAL OF CHEMICAL PHYSICS, 2004, 120 (21) : 10240 - 10246
[9] Redox-transmetalation process as a generalized synthetic strategy for core-shell magnetic nanoparticles
Lee, WR
Kim, MG
Choi, JR
Park, JI
Ko, SJ
Oh, SJ
Cheon, J
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (46) : 16090 - 16097
[10] Gold nanoparticles with different capping systems:: An electronic and structural XAS analysis
López-Cartes, C
Rojas, TC
Litrán, R
Martínez-Martínez, D
de la Fuente, JM
Penadés, S
Fernández, A
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (18) : 8761 - 8766

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