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

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• 作者：Ki Woong Kim ; Soo Min Kim ; Suhee Choi ; Jongwon Kim ; In Su Lee
• 刊名：ACS Nano
• 出版年：2012
• 出版时间：June 26, 2012
• 年：2012
• 卷：6
• 期：6
• 页码：5122-5129
• 全文大小：544K
• 年卷期：v.6,no.6(June 26, 2012)
• ISSN：1936-086X

文摘

A novel electroless Pt deposition method was exploited by employing the galvanic replacement process occurring between the Mn₃O₄ surface and PtCl₄2鈥?/sup> 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.

Keywords:

nanoparticles; manganese; platinum; electroless deposition; electrocatalysis