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Title: Pt monolayer shell on nitrided alloy core — A path to highly stable oxygen reduction catalyst

The inadequate activity and stability of Pt as a cathode catalyst under the severe operation conditions are the critical problems facing the application of the proton exchange membrane fuel cell (PEMFC). Here we report on a novel route to synthesize highly active and stable oxygen reduction catalysts by depositing Pt monolayer on a nitrided alloy core. The prepared PtMLPdNiN/C catalyst retains 89% of the initial electrochemical surface area after 50,000 cycles between potentials 0.6 and 1.0 V. By correlating electron energy-loss spectroscopy and X-ray absorption spectroscopy analyses with electrochemical measurements, we found that the significant improvement of stability of the PtMLPdNiN/C catalyst is caused by nitrogen doping while reducing the total precious metal loading.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [3] ;  [3] ;  [4] ;  [2] ;  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Chinese Academy of Sciences (CAS), Beijing (China)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Korea Institute of Energy Research, Daejeon (Korea)
  4. Chinese Academy of Sciences (CAS), Beijing (China)
Publication Date:
OSTI Identifier:
1213365
Report Number(s):
BNL--108200-2015-JA
Journal ID: ISSN 2073-4344; CATACJ; R&D Project: MA510MAEA; KC0302010
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Catalysts
Additional Journal Information:
Journal Volume: 5; Journal Issue: 3; Journal ID: ISSN 2073-4344
Publisher:
MDPI
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY nickel nitride; ORR; electrocatalyst; core-shell; stability; Pt monolayer