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Title: Maximizing the Catalytic Performance of Pd@AuxPd1-x Nanocubes in H2O2 Production by Reducing Shell Thickness to Increase Compositional Stability

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [2];  [3];  [4];  [2];  [2];  [2];  [4];  [5];  [4]; ORCiD logo [3]
  1. Georgia Inst. of Technology, Atlanta, GA (United States); Emory Univ., Atlanta, GA (United States); Hong Kong University of Science and Technology (HKUST) (Hong Kong)
  2. Georgia Inst. of Technology, Atlanta, GA (United States)
  3. Georgia Inst. of Technology, Atlanta, GA (United States); Emory Univ., Atlanta, GA (United States)
  4. Hong Kong University of Science and Technology (HKUST) (Hong Kong)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

We report a simple route based upon seed-mediated growth to the synthesis of Pd@AuxPd1-x (0.8≤x≤1) core–shell nanocubes. Benefiting from the well-defined {100} facets and an optimal Au/Pd ratio for the surface, the nanocubes bearing a shell made of Au0.95Pd0.05 work as an efficient electrocatalyst toward H2O2 production, with high selectivity of 93–100 % in the low-overpotential region of 0.4–0.7 V. When the Au0.95Pd0.05 alloy is confined to a shell of only three atomic layers in thickness, the electrocatalyst is able to maintain its surface structure and elemental composition, endowing continuous and stable production of H2O2 during oxygen reduction at a high rate of 1.62 mol g(Pd+Au)-1 h-1. This work demonstrates a versatile route to the rational development of active and durable electrocatalysts based upon alloy nanocrystals.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1823333
Journal Information:
Angewandte Chemie (International Edition), Vol. 60, Issue 36; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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