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Preparation of PtRu nanoparticles on various carbon supports using surfactants and their catalytic activities for methanol electro-oxidation

Title
Preparation of PtRu nanoparticles on various carbon supports using surfactants and their catalytic activities for methanol electro-oxidation
Authors
Kim, C[Kim, Cham]Kwon, HH[Kwon, Heock-Hoi]Song, IK[Song, In Kyu]Sung, YE[Sung, Yung-Eun]Chung, WS[Chung, Won Seob]Lee, HI[Lee, Ho-In]
DGIST Authors
Kim, C[Kim, Cham]
Issue Date
2007-09-27
Citation
Journal of Power Sources, 171(2), 404-411
Type
Article
Article Type
Article
Keywords
AdsorptionAnodesCarbonCarbon SpheruleCatalyst ActivityDirect Methanol Fuel Cell (DMFC)Direct Methanol Fuel Cells (DMFCs)ElectrooxidationMethanolMethanol Electro-OxidationNanoparticlesPlatinum AlloysPlatinum PoisoningPt-Ru or Platinum-RutheniumSurface Active Agents
ISSN
0378-7753
Abstract
In the anodes of direct methanol fuel cells (DMFCs), Pt poisoning by CO adsorption during methanol electro-oxidation has been a serious problem. Efforts to overcome or minimize this obstacle have largely involved investigations of PtRu bimetallic catalysts. In order to prepare fine PtRu alloyed hydrosols, we used non-ionic surfactants including L121, Pluronic P123, P65, Brij 35, and Tween 20 as stabilizers in this study. The sizes of the prepared metal particles change with the surfactant used. The finest metal hydrosol is obtained when Pluronic P123 and P65 are used. The resulting metal hydrosols with Pluronic P123, Brij 35 and Tween 20 are supported on Vulcan XC-72R. PtRu/XC-72R prepared with Pluronic P123 exhibits the best catalytic activity due to better dispersion of the alloyed metal. To improve further the activity of the PtRu catalyst, the commercial Vulcan XC-72R is replaced with carbon spherule (CS), a home-made carbon support. Electrochemical analyses such as cyclic voltammetry and galvanostatic-polarization tests are performed to evaluate the prepared catalyst. PtRu/CS has a superior performance to PtRu/XC-72R in methanol electro-oxidation when Pluronic P123 is employed as the stabilizer. The higher conductivity and larger inter-particle space of the CS appear to facilitate methanol electro-oxidation. © 2007 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/3585
DOI
10.1016/j.jpowsour.2007.05.109
Publisher
Elsevier B.V.
Related Researcher
Files:
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Collection:
Magnetic-Controlled Materials Research Group1. Journal Articles


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