Your browser doesn't support javascript.
loading
ELECTROCHEMISTRY. High-performance transition metal-doped Pt3Ni octahedra for oxygen reduction reaction.
Huang, Xiaoqing; Zhao, Zipeng; Cao, Liang; Chen, Yu; Zhu, Enbo; Lin, Zhaoyang; Li, Mufan; Yan, Aiming; Zettl, Alex; Wang, Y Morris; Duan, Xiangfeng; Mueller, Tim; Huang, Yu.
Afiliação
  • Huang X; Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute (CNSI), University of California, Los Angeles, CA 90095, USA.
  • Zhao Z; Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute (CNSI), University of California, Los Angeles, CA 90095, USA.
  • Cao L; Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA.
  • Chen Y; Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute (CNSI), University of California, Los Angeles, CA 90095, USA.
  • Zhu E; Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute (CNSI), University of California, Los Angeles, CA 90095, USA.
  • Lin Z; Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.
  • Li M; Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.
  • Yan A; Department of Physics and Center of Integrated Nanomechanical Systems, University of California, Berkeley, CA 94720, USA. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Kavli Energy NanoSciences Institute at the University of California, Berkeley, and th
  • Zettl A; Department of Physics and Center of Integrated Nanomechanical Systems, University of California, Berkeley, CA 94720, USA. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Kavli Energy NanoSciences Institute at the University of California, Berkeley, and th
  • Wang YM; Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory (LLNL), Livermore, CA 94550, USA.
  • Duan X; California NanoSystems Institute (CNSI), University of California, Los Angeles, CA 90095, USA. Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.
  • Mueller T; Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA. tmueller@jhu.edu yhuang@seas.ucla.edu.
  • Huang Y; Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. California NanoSystems Institute (CNSI), University of California, Los Angeles, CA 90095, USA. tmueller@jhu.edu yhuang@seas.ucla.edu.
Science ; 348(6240): 1230-4, 2015 Jun 12.
Article em En | MEDLINE | ID: mdl-26068847
Bimetallic platinum-nickel (Pt-Ni) nanostructures represent an emerging class of electrocatalysts for oxygen reduction reaction (ORR) in fuel cells, but practical applications have been limited by catalytic activity and durability. We surface-doped Pt3Ni octahedra supported on carbon with transition metals, termed M-Pt3Ni/C, where M is vanadium, chromium, manganese, iron, cobalt, molybdenum (Mo), tungsten, or rhenium. The Mo-Pt3Ni/C showed the best ORR performance, with a specific activity of 10.3 mA/cm(2) and mass activity of 6.98 A/mg(Pt), which are 81- and 73-fold enhancements compared with the commercial Pt/C catalyst (0.127 mA/cm(2) and 0.096 A/mg(Pt)). Theoretical calculations suggest that Mo prefers subsurface positions near the particle edges in vacuum and surface vertex/edge sites in oxidizing conditions, where it enhances both the performance and the stability of the Pt3Ni catalyst.
Texto completo
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Estados Unidos
Texto completo
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Estados Unidos