Single-atom Mo-tailored high-entropy-alloy ultrathin nanosheets with intrinsic tensile strain enhance electrocatalysis

Abstract The precise structural integration of single-atom and high-entropy-alloy features for energy electrocatalysis is highly appealing for energy conversion, yet remains a grand challenge. Herein, we report a class of single-atom Mo-tailored PdPtNiCuZn high-entropy-alloy nanosheets with dilute Pt-Pt ensembles and intrinsic tensile strain (Mo 1 -PdPtNiCuZn) as efficient electrocatalysts for enhancing the methanol oxidation reaction catalysis. The as-made Mo 1 -PdPtNiCuZn delivers an extraordinary mass activity of 24.55 A mg Pt −1 and 11.62 A mg Pd+Pt −1 , along with impressive long-term durability. The planted oxophilic Mo single atoms as promoters modify the electronic structure of isolated Pt sites in the…

• NN
  National Natural Science Foundation of China

  Awards: BL1W1B, 52261135633, 52071119, 52271170, 52025133
• CP
  China Postdoctoral Science Foundation

  Award: 2022M710201
• CN
  China National Petroleum Corporation

  Award: 2021DQ02-1002
• HI
  Harbin Institute of Technology

  Awards: 2021025, 2022TS38
• PU
  Peking University

  Award: 2021DQ02-1002
• SK
  State Key Laboratory of Urban Water Resource and Environment

  Award: 2022TS38
• FR
  Fundamental Research Funds for the Central Universities

  Awards: HIT.OCEF.2021025, 2021025
• BS
  Beijing Synchrotron Radiation Facility