publication . Article . 2016

Electrochemical Reduction of Dissolved Oxygen in Alkaline, Solid Polymer Electrolyte Films

Steven Holdcroft; Aslan Kosakian;
Restricted
  • Published: 15 Nov 2016 Journal: Journal of the American Chemical Society, volume 138, pages 15,465-15,472 (issn: 0002-7863, eissn: 1520-5126, Copyright policy)
  • Publisher: American Chemical Society (ACS)
Abstract
Mass transport of oxygen through an ionomer contained within the cathode catalyst layer in an anion exchange membrane fuel cell is critical for a functioning fuel cell, yet is relatively unexplored. Moreover, because water is a reactant in the oxygen reduction reaction (ORR) in alkaline media, an adequate supply of water is required. In this work, ORR mass transport behavior is reported for methylated hexamethyl-p-terphenyl polymethylbenzimidazoles (HMT-PMBI), charge balanced by hydroxide ions (IEC from 2.1 to 2.5 mequiv/g), and commercial Fumatec FAA-3 membranes. Electrochemical mass transport parameters are determined by potential step chronoamperometry using ...
Subjects
free text keywords: Colloid and Surface Chemistry, Biochemistry, General Chemistry, Catalysis
Funded by
NSERC
Project
  • Funder: Natural Sciences and Engineering Research Council of Canada (NSERC)
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