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Title: Fuel cell performance of palladium-platinum core-shell electrocatalysts synthesized in gram-scale batches

This article presents the performance of palladium-platinum core-shell catalysts (Pt/Pd/C) for oxygen reduction synthesized in gram-scale batches in both liquid cells and polymer-electrolyte membrane fuel cells. Core-shell catalyst synthesis and characterization, ink fabrication, and cell assembly details are discussed. The Pt mass activity of the Pt/Pd core-shell catalyst was 0.95 A mg –1 at 0.9 V measured in liquid cells (0.1 M HClO4), which was 4.8 times higher than a commercial Pt/C catalyst. The performances of Pt/Pd/C and Pt/C in large single cells (315 cm 2) were assessed under various operating conditions. The core-shell catalyst showed consistently higher performance than commercial Pt/C in fuel cell testing. A 20–60 mV improvement across the whole current density range was observed on air. Sensitivities to temperature, humidity, and gas composition were also investigated and the core-shell catalyst showed a consistent benefit over Pt under all conditions. However, the 4.8 times activity enhancement predicated by liquid cell measurements was not fully realized in fuel cells.
 [1] ;  [2] ;  [1] ;  [3] ;  [3] ;  [4]
  1. UTC Power, South Windsor, CT (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. UTC Power, South Windsor, CT (United States); United Technologies Research Center, East Hartford, CT (United States)
  4. The Hong Kong Univ. of Science and Technology, Kowloon (Hong Kong)
Publication Date:
Report Number(s):
Journal ID: ISSN 0013-4651; R&D Project: 16060; KC0403020
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 163; Journal Issue: 7; Journal ID: ISSN 0013-4651
The Electrochemical Society
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
29 ENERGY PLANNING, POLICY, AND ECONOMY; Core-shell; polymer electrolyte membrane fuel cell; platinum monolayer; oxygen reduction reaction; Center for Functional Nanomaterials
OSTI Identifier: