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Title: Concentration Effects of Polymer Electrolyte Membrane Degradation Products on Oxygen Reduction Activity for Three Platinum Catalysts

A rotating disk electrode (RDE) along with cyclic voltammetry (CV) and linear sweep voltammetry (LSV), were used to investigate the impact of two model compounds representing degradation products of Nafion and 3M perfluorinated sulfonic acid membranes on the electrochemical surface area (ECA) and oxygen reduction reaction (ORR) activity of polycrystalline Pt, nano-structured thin film (NSTF) Pt (3M), and Pt/Vulcan carbon (Pt/Vu) (TKK) electrodes. ORR kinetic currents (measured at 0.9 V and transport corrected) were found to decrease linearly with the log of concentration for both model compounds on all Pt surfaces studied. Ultimately, model compound adsorption effects on ECA were more abstruse due to competitive organic anion adsorption on Pt surfaces superimposing with the hydrogen underpotential deposition (HUPD) region.
 [1] ;  [2] ;  [1] ;  [2]
  1. Colorado School of Mines, Golden, CO (United States). Dept. of Chemistry and Geochemistry
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0013-4651
Grant/Contract Number:
AC36-08GO28308; ZGB-0-4-647-1
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 161; Journal Issue: 14; Journal ID: ISSN 0013-4651
The Electrochemical Society
Research Org:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy Fuel Cell Technologies Office
Country of Publication:
United States
30 DIRECT ENERGY CONVERSION; 36 MATERIALS SCIENCE Chemical and Material Sciences; rotating disk electrode; cyclic voltammetry; linear sweep valtammetry; electrochemical surface