title: CO tolerance of Pt/FeOxcatalyst in both thermal catalytic H2oxidation and electrochemical CO oxidation: the effect of Pt deficit electron state.
abstract: CO poisoning of Pt catalysts is one of the major challenges to the commercialization of proton exchange membrane fuel cells. One promising solution is to develop CO-tolerant Pt-based catalysts. A facilely synthesized Pt/FeOxcatalyst exhibited outstanding CO tolerance in the oxidation of H2and electrochemical CO stripping. Light-off temperature of H2O formation over Pt/FeOxwas achieved even below 30 °C in the presence of 3000 ppm CO at a space velocity of 18 000 mL g-1cath-1. For the electrochemical oxidation of CO, the onset and peak potentials decreased by 0.17 V and 0.10 V, respectively, in comparison with those of commercial Pt/C. More importantly, by a combination of hard X-ray photoemission spectroscopy and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) studies it was found that the decreased electron density of Pt in Pt/FeOxenhanced the mobility of adsorbed CO, suppressed Pt-CO bonding and significantly increased the CO tolerance of Pt/FeOx.
authors.affiliation: TU-NIMS Joint Research Center, Key Lab of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, China. Lequan.Liu@tju.edu.cn and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
authors.forename: Lequan
authors.initials: L
authors.lastname: Liu
authors.affiliation: Centre for Green Chemistry and Catalysis, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No. 18 Tianshui Middle Road, Lanzhou 730000, China. ydeng@licp.cas.cn.
authors.forename: Feng
authors.initials: F
authors.lastname: Zhou
authors.affiliation: International Center for Materials Nanoarchitectonics (WPI-MANA), Environmental Remediation Materials Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. Jinhua.YE@nims.go.jp.
authors.forename: Rajesh
authors.initials: R
authors.lastname: Kodiyath
authors.affiliation: Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan and Quantum Beam Unit, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.
authors.forename: Shigenori
authors.initials: S
authors.lastname: Ueda
authors.affiliation: International Center for Materials Nanoarchitectonics (WPI-MANA), Environmental Remediation Materials Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. Jinhua.YE@nims.go.jp.
authors.forename: Hideki
authors.identifier: http://orcid.org/0000-0003-2111-9492
authors.initials: H
authors.lastname: Abe
authors.affiliation: TU-NIMS Joint Research Center, Key Lab of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, China. Lequan.Liu@tju.edu.cn and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
authors.forename: Defa
authors.initials: D
authors.lastname: Wang
authors.affiliation: Centre for Green Chemistry and Catalysis, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No. 18 Tianshui Middle Road, Lanzhou 730000, China. ydeng@licp.cas.cn.
authors.forename: Youquan
authors.initials: Y
authors.lastname: Deng
authors.affiliation: TU-NIMS Joint Research Center, Key Lab of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, China. Lequan.Liu@tju.edu.cn and International Center for Materials Nanoarchitectonics (WPI-MANA), Environmental Remediation Materials Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. Jinhua.YE@nims.go.jp and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
authors.forename: Jinhua
authors.initials: J
authors.lastname: Ye