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Electroless Pt Deposition on Mn3O4 Nanoparticles via the Galvanic Replacement Process : Electrocatalytic Nanocomposite with Enhanced Performance for Oxygen Reduction Reaction
-Ki Woong Kim,†,^ Soo Min Kim,‡,^ Suhee Choi,§ Jongwon Kim,§,* and In Su Lee‡,*
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.
- 2380234436_91e3e33d_5BACS_Nano__2012__6__5122-51295D.pdf (2.3M) 8회 다운로드 | DATE : 2012-07-03 09:47:45
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