title: A durable PtRu/C catalyst with a thin protective layer for direct methanol fuel cells.
abstract: A methanol oxidation catalyst with improved durability in acidic environments is reported. The catalyst consists of PtRu alloy nanoparticles on a carbon support that were stabilized with a silane-coupling agent. The catalyst was prepared by reducing ions of Pt and Ru in the presence of a carbon support and the silane-coupling agent. The careful choice of preparatory conditions such as the concentration of the silane-coupling agent and solution pH resulted in the preparation of catalyst in which the PtRu nanoparticles were dispersively adsorbed onto the carbon support. The catalytic activity was similar to that of a commercial catalyst and was unchanged after immersion in sulfuric acid solution for 1000 h, suggesting the high durability of the PtRu catalyst for the anode of direct methanol fuel cells.
authors.affiliation: Materials Research Laboratory, Hitachi Ltd., 7-1-1, Omika-cho, Hitachi 319-1292, Japan.
authors.forename: Yuzuru
authors.initials: Y
authors.lastname: Shimazaki
authors.forename: Sho
authors.initials: S
authors.lastname: Hayasaka
authors.forename: Tsubasa
authors.initials: T
authors.lastname: Koyama
authors.forename: Daisuke
authors.initials: D
authors.lastname: Nagao
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: Mikio
authors.initials: M
authors.lastname: Konno
mesh_terms: D000497:Alloys / Q000737:chemistry; D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D011211:Electric Power Supplies; D000432:Methanol / Q000737:chemistry*; D010084:Oxidation-Reduction; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000497:Alloys; D010984:Platinum; D002244:Carbon; D012428:Ruthenium; D000432:Methanol