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  Preparation, Characterization and Properties of Pt-Cu Co-reduced and Pt-on-Cu Skin Type Bimetallic Carbon-Supported (Vulcan XC72) Electrocatalysts

Nagabhushana, K. S., Weidenthaler, C., Hočevar, S., Strmčnik, D., Gaberšček, M., Antozzi, A. L., et al. (2006). Preparation, Characterization and Properties of Pt-Cu Co-reduced and Pt-on-Cu Skin Type Bimetallic Carbon-Supported (Vulcan XC72) Electrocatalysts. Journal of New Materials for Electrochemical Systems, 9(2), 73-81.

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 Creators:
Nagabhushana, K. S.1, Author              
Weidenthaler, C.2, Author              
Hočevar, S.3, Author
Strmčnik, D.3, Author
Gaberšček, M.3, Author
Antozzi, A. L.4, Author
Martelli, G. N.4, Author
Affiliations:
1Research Group Bönnemann, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445600              
2Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
3National Institute of Chemistry, Hajdrihova 19, P.O.Box 660, SI-1001 Ljubljana, Slovenia, ou_persistent22              
4De Nora Tecnologie Elettrochimiche S.r.l., Via Bistolfi, 35, I-20134 Milano, Italy, ou_persistent22              

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Free keywords: Fuel cell; Electro catalysis; Bimetallic catalysts; Pt-Cu; Hydrogen oxidation reaction
 Abstract: Pt/Cu salt co-reduction and, subsequent reduction of Cu(acac)2 and PtCl2 allows to generate either alloyed Pt-Cu or skin type Pt-on-Cu carbon-supported (20 wt%, Pt:Cu = 50:50 a/o on Vulcan XC72) electrocatalysts. An examination by TEM revealed that the co-reduced Pt-Cu catalyst have well dispersed bimetallic nanoparticles (av. particle size 3.6 nm). The skin type Pt-on-Cu catalyst shows tiny Pt clusters (1-2 nm) decorating the surface of larger Cu particles (6-8 nm). XRD pattern of the co-reduced Pt-Cu catalyst shows weak and broad diffraction peaks consistent with a predominantly alloyed composition (plus a few Pt crystallites). Pattern of the skin type Pt-on-Cu/C catalyst reveals larger nanoparticles and points to the formation of (surface) alloy. SEM/EDAX showed a uniform metal distribution present in both Pt-Cu systems. XPS measurements indicated that in both cases only Pto is present. In co-reduced alloy catalyst a higher amount of Cu2+ was present at the nanoparticle surface (Cuo/ Cu2+ = 0.6), while on the surface of the skin type Pt-on-Cu system Cuo and Cu2+ exist in equal amounts (Cuo/ Cu2+ = 1.0). Both types of Cu containing catalysts have higher mass specific activity in hydrogen oxidation reaction (HOR) than the industrial benchmark Pt/C catalyst. The electrocatalytic properties depend on morphological structure subtleties.

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Language(s): eng - English
 Dates: 2005-03-212005-07-122006-04-01
 Publication Status: Published in print
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 300541
ISI: 000243395300001
 Degree: -

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Title: Journal of New Materials for Electrochemical Systems
  Abbreviation : J. New Mater. Electrochem. Syst.
Source Genre: Journal
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Publ. Info: Canada : International Information and Engineering Technology Association
Pages: - Volume / Issue: 9 (2) Sequence Number: - Start / End Page: 73 - 81 Identifier: ISSN: 1480-2422
CoNE: https://pure.mpg.de/cone/journals/resource/110985820565052