Jump to main content
Jump to site search

Issue 41, 2014
Previous Article Next Article

Mechanistic analysis of ammonium cation stability for alkaline exchange membrane fuel cells

Author affiliations

Abstract

Improving long-term cation stability is crucial for adopting anion exchange membrane fuel cells as a commercially viable technology in clean energy conversion applications. To reliably identify the most stable cation structures, we analyzed the cation stability of various synthetically prepared quaternary ammonium organic molecules via a silver oxide ion exchange reaction. This method enabled us to compare the stability of various structures of quaternary ammonium hydroxide in pure form in water without excess alkaline solution or inconsistencies faced in the presence of polymer backbones. By quantitatively comparing cation degradation via NMR, we were able to identify three cation structures with greater cation stability than the most well-known benzyltrimethylammonium. In addition, we were able to elucidate byproduct formation and degradation mechanisms as a result of hydroxide attack. From this study we concluded that alkyl-substituted cations seem to impart greater stability than benzylic-substituted cations in the presence of hydroxide anions in aqueous solution.

Graphical abstract: Mechanistic analysis of ammonium cation stability for alkaline exchange membrane fuel cells

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Jun 2014, accepted on 06 Aug 2014 and first published on 29 Aug 2014


Article type: Paper
DOI: 10.1039/C4TA03300K
Author version
available:
Download author version (PDF)
J. Mater. Chem. A, 2014,2, 17314-17320

  •   Request permissions

    Mechanistic analysis of ammonium cation stability for alkaline exchange membrane fuel cells

    A. D. Mohanty and C. Bae, J. Mater. Chem. A, 2014, 2, 17314
    DOI: 10.1039/C4TA03300K

Search articles by author

Spotlight

Advertisements