Electroless Pt Deposition on Mn3O4 Nanoparticles via the Galvanic Replacement Process: Electrocatalytic Nanocomposite with Enhanced Performance for Oxygen Reduction Reaction

A novel electroless Pt deposition method was exploited by employing the galvanic replacement process occurring between the Mn3O4 surface and PtCl4 2– complexes. The newly discovered process provides a simple protocol to produce the catalytic nanocomposite, in which a high density of ultrafine Pt nan...

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Bibliographic Details
Published inACS nano Vol. 6; no. 6; pp. 5122 - 5129
Main Authors Kim, Ki Woong, Kim, Soo Min, Choi, Suhee, Kim, Jongwon, Lee, In Su
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 26.06.2012
Subjects
Catalysis
Electroplating - methods
Manganese Compounds - chemistry
Materials Testing
Nanoparticles - chemistry
Nanoparticles - ultrastructure
Oxidation-Reduction
Oxides - chemistry
Oxygen - chemistry
Particle Size
Platinum - chemistry
platinum
nanoparticles
electroless deposition
manganese
electrocatalysis
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Summary:A novel electroless Pt deposition method was exploited by employing the galvanic replacement process occurring between the Mn3O4 surface and PtCl4 2– complexes. The newly discovered process provides a simple protocol to produce the catalytic nanocomposite, in which a high density of ultrafine Pt nanocrystals is stably immobilized in a homogeneously dispersive state on the surface of Mn3O4 nanoparticles. When the eletrocatalytic activity was tested for the oxygen reduction reaction, which limits the rate of the overall process in proton-exchange membrane fuel cells, the resulting Pt/Mn3O4 nanocomposite showed highly enhanced specific activity and durability, compared with those of the commercial Pt/C catalyst.
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ISSN:1936-0851
1936-086X
DOI:10.1021/nn300782m