Biaxially strained PtPb/Pt core/shell nanoplate boosts oxygen reduction catalysis

Compressive surface strains have been necessary to boost oxygen reduction reaction (ORR) activity in core/shell M/platinum (Pt) catalysts (where M can be nickel, cobalt, or iron). We report on a class of platinum-lead/platinum (PtPb/Pt) core/shell nanoplate catalysts that exhibit large biaxial strains. The stable Pt (110) facets of the nanoplates have high ORR specific and mass activities that reach 7.8 milliampere (mA) per centimeter squared and 4.3 ampere per milligram of platinum at 0.9 volts versus the reversible hydrogen electrode (RHE), respectively. Density functional theory calculations reveal that the edge-Pt and top (bottom)-Pt (110) facets undergo large tensile strains that help optimize the Pt-O…

• UD
  U.S. Department of Energy

  Award: SC0012704
• MO
  Ministry of Science and Technology

  Award: 2016YFA0204100
• NN
  National Natural Science Foundation of China

  Awards: 21571135, 2016YFB0100201, 51671003, 2016YFA0204100
• SU
  Soochow University

  Awards: 2016YFA0204100, 21571135
• PU
  Peking University
• PA
  Priority Academic Program Development of Jiangsu Higher Education Institutions

  Awards: 2016YFA0204100, 21571135
• NK
  National Key Research and Development Program of China

  Awards: 2016YFB0100201, 51671003, 2016YFA0204100
• BN
  Brookhaven National Laboratory

  Award: SC0012704