Degradation of Carbon-Supported Pt Bimetallic Nanoparticles by Surface Segregation

被引：172

作者：

Mayrhofer, Karl J. J. ^{[1
]}

Hartl, Katrin ^{[1
]}

Juhart, Viktorija ^{[1
]}

Arenz, Matthias ^{[1
]}

机构：

[1] Tech Univ Munich, Lehrstuhl Phys Chem, D-85748 Garching, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 45期

关键词：

OXYGEN REDUCTION; FUEL-CELLS; ALLOY; CO; ELECTROCATALYSIS; CATALYSTS; NANOSCALE; STABILITY; PLATINUM;

D O I：

10.1021/ja9074216

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Surface segregation of the non-noble component of a Pt bimetallic core-shell catalyst can occur even at room temperature under typical fuel cell cathode application conditions. While in an alkaline environment the nanoparticles remain stable, and the alteration in the surface composition can be tracked in situ; in an acidic electrolyte, any non-noble alloying material at the surface would immediately dissolve into the electrolyte. Therefore, such catalysts are expected to degrade steadily during operation in an acidic fuel cell until only Pt is left.

引用

页码：16348 / +

页数：4

共 20 条

[1] The stability of Pt-M (M = first row transition metal) alloy catalysts and its effect on the activity in low temperature fuel cells - A literature review and tests on a Pt-Co catalyst
Antolini, Ermete
Salgado, Jose R. C.
Gonzalez, Ernesto R.
[J]. JOURNAL OF POWER SOURCES, 2006, 160 (02) : 957 - 968
[2] Scientific aspects of polymer electrolyte fuel cell durability and degradation
Borup, Rod
Meyers, Jeremy
Pivovar, Bryan
Kim, Yu Seung
Mukundan, Rangachary
Garland, Nancy
Myers, Deborah
Wilson, Mahlon
Garzon, Fernando
Wood, David
Zelenay, Piotr
More, Karren
Stroh, Ken
Zawodzinski, Tom
Boncella, James
McGrath, James E.
Inaba, Minoru
Miyatake, Kenji
Hori, Michio
Ota, Kenichiro
Ogumi, Zempachi
Miyata, Seizo
Nishikata, Atsushi
Siroma, Zyun
Uchimoto, Yoshiharu
Yasuda, Kazuaki
Kimijima, Ken-ichi
Iwashita, Norio
[J]. CHEMICAL REVIEWS, 2007, 107 (10) : 3904 - 3951
[3] Enhanced activity for oxygen reduction reaction on "Pt3CO" nanoparticles:: Direct evidence of percolated and sandwich-segregation structures
Chen, Shuo
Ferreira, Paulo J.
Sheng, Wenchao
Yabuuchi, Naoaki
Allard, Lawrence F.
Shao-Horn, Yang
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (42) : 13818 - 13819
[4] Oxygen reduction catalysis of the Pt3Co alloy in alkaline and acidic media studied by x-ray photoelectron Spectroscopy and electrochemical methods
Duong, Hung T.
Rigsby, Matthew A.
Zhou, Wei-Ping
Wieckowski, Andrzej
[J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (36) : 13460 - 13465
[5] 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
[6] Greeley J, 2009, NAT CHEM, V1, P552, DOI [10.1038/NCHEM.367, 10.1038/nchem.367]
[7] Combinatorial Density Functional Theory-Based Screening of Surface Alloys for the Oxygen Reduction Reaction
Greeley, Jeff
Norskov, Jens K.
[J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (12) : 4932 - 4939
[8] Structure-activity-stability relationships of Pt-Co alloy electrocatalysts in gas-diffusion electrode layers
Koh, Shirlaine
Leisch, Jennifer
Toney, Michael F.
Strasser, Peter
[J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (09) : 3744 - 3752
[9] Fuel cell catalyst degradation on the nanoscale
Mayrhofer, Karl J. J.
Meier, Josef C.
Ashton, Sean J.
Wiberg, Gustav K. H.
Kraus, Florian
Hanzlik, Marianne
Arenz, Matthias
[J]. ELECTROCHEMISTRY COMMUNICATIONS, 2008, 10 (08) : 1144 - 1147
[10] Log on for new catalysts
Mayrhofer, Karl J. J.
Arenz, Matthias
[J]. NATURE CHEMISTRY, 2009, 1 (07) : 518 - 519

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