title: Electroless Pt deposition on Mn3O4 nanoparticles via the galvanic replacement process: electrocatalytic nanocomposite with enhanced performance for oxygen reduction reaction.
abstract: A novel electroless Pt deposition method was exploited by employing the galvanic replacement process occurring between the Mn(3)O(4) surface and PtCl(4)(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 Mn(3)O(4) 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/Mn(3)O(4) nanocomposite showed highly enhanced specific activity and durability, compared with those of the commercial Pt/C catalyst.
authors.affiliation: Department of Applied Chemistry, Kyung Hee University, Gyeonggi-do 446-701, Korea.
authors.forename: Ki Woong
authors.initials: KW
authors.lastname: Kim
authors.forename: Soo Min
authors.initials: SM
authors.lastname: Kim
authors.forename: Suhee
authors.initials: S
authors.lastname: Choi
authors.forename: Jongwon
authors.initials: J
authors.lastname: Kim
authors.forename: In Su
authors.initials: IS
authors.lastname: Lee
mesh_terms: D002384:Catalysis; D004595:Electroplating / Q000379:methods*; D017895:Manganese Compounds / Q000737:chemistry*; D008422:Materials Testing; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*
chemical_list: D017895:Manganese Compounds; D010087:Oxides; D010984:Platinum; C027424:manganese oxide; D010100:Oxygen