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Title: The contamination mechanism and behavior of amide bond containing organic contaminant on PEMFC

Journal Article · · Journal of the Electrochemical Society
DOI:https://doi.org/10.1149/2.0631504jes· OSTI ID:1220615
 [1];  [1];  [2];  [2];  [3]
  1. Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemical Engineering
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States). Chemical and Materials Science Center
  3. Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Chemical and Biological Engineering

In this paper, a study is presented of the effects of an organic contaminant containing an amide bond (-CONH-), ε-caprolactam, on polymer electrolyte membrane fuel cells (PEMFCs). The ε-caprolactam has been detected in leachates from polyphthalamide materials that are being considered for use as balance-of-plant structural materials for PEMFCs. Contamination effects from ε-caprolactam in Nafion membranes are shown to be controlled by temperature. A possible explanation of the temperature effect is the endothermic ring-opening reaction of the amide bond (-NHCO-) of the cyclic ε-caprolactam. UV-vis and ATR-IR spectroscopy studies confirmed the presence of open ring structure of ε-caprolactam in membranes. The ECSA and kinetic current for the ORR of the Pt/C catalyst were also investigated and were observed to decrease upon contamination by the ε-caprolactam. By comparison of the CVs of ammonia and acetic acid, we confirmed the adsorption of carboxylic acid (-COOH) or carboxylate anion (-COO-) onto the surface of the Pt. In conclusion, a comparison of in situ voltage losses at 80°C and 50°C also revealed temperature effects, especially in the membrane, as a result of the dramatic increase in the HFR.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States); Univ. of South Carolina, Columbia, SC (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Hydrogen Fuel Cell Technologies Office
Grant/Contract Number:
AC36-08GO28308; ZGB-0-99180-1
OSTI ID:
1220615
Report Number(s):
NREL/JA-5900-62537
Journal Information:
Journal of the Electrochemical Society, Vol. 162, Issue 4; Related Information: Journal of the Electrochemical Society; ISSN 0013-4651
Publisher:
The Electrochemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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Cited By (2)

A Scaling Method for Correlating Ex Situ and In Situ Measurements in PEM Fuel Cells and Electrolyzer journal January 2018
Fluorescence-Based Detection of Benzene, Toluene, Ethylbenzene, Xylene, and Cumene (BTEXC) Compounds in Fuel-Contaminated Snow Environments journal January 2019

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