ArticleJournal of the American Chemical Society2024
Operando Raman Spectroscopy Reveals Degradation Byproducts from Ionomer Oxidation in Anion Exchange Membrane Water Electrolyzers.
Article in Journal of the American Chemical Society, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
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The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
5 citing papers in PubMed.
- From Lab to Fab: Path Forward for Multi-Scale Design of Industrial Anion Exchange Membrane Electrolyzers.Advanced materials (Deerfield Beach, Fla.) · 2026Review
- Scalable Multilayer PTFE-Reinforced Membranes for Durable, High-Current-Density Hydroxide Exchange Membrane Water Electrolysis in Dilute Alkali.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
- Rational Engineering of Self-Supported Catalysts for High-Performance Electrochemical Oxygen Evolution and Ethylene Glycol Oxidation.Chemistry of materials : a publication of the American Chemical Society · 2026Article
- Oxidative stability as a guiding principle for durable ionomer cations in pure-water electrolysis.Nature communications · 2026Article
- Long-term electrochemical carbon capture from diverse CONature communications · 2025Article
Corrections and comments
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Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
This work showcases the discovery of degradation mechanisms for nonplatinum group metal catalyst (PGM free) based anion exchange membrane water electrolyzers (AEMWE) that utilize hydroxide ion conductive polymer ionomers and membranes in a zero gap configuration. An entirely unique and customized test cell was designed from the ground up for the purposes of obtaining Raman spectra during potentiostatic operation. These results represent some of the first operando Raman spectroscopy explorations into the breakdown products that are generated from high oxidative potential conditions with carbonate electrolytes. We provide a unique design and fabrication method for three-dimensional (3D) printable flow cells that enable spatially resolved Raman spectra collection from the electrode surface into the bulk electrolyte. It is proposed that the generation of breakdown products from the hydroxide-conductive ionomers and membranes originates from a multistep, free radical reaction pathway resulting in chain scission of the poly aryl backbone. This hypothesis is backed by the detection of carboxylic and aromatic functional group Raman signals from small molecules that had dissolved and diffused into the bulk electrolyte.
Identifiers
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Registered trials
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