Study on Corrosion Migrations within Catalyst-Coated Membranes of Proton Exchange Membrane Electrolyzer Cells

Johney Green, Jingke Mo, Stuart Steen, Zhenye Kang, Gaoqiang Yang, Derrick Taylor, Yifan Li, Todd Toops, Michael Brady, Scott Retterer, David Cullen, Feng-Yuan Zhang

Research output: Contribution to journalArticlepeer-review

28 Scopus Citations

Abstract

The corrosion of low-cost, easily manufactured metallic components inside the electrochemical environment of proton exchange membrane electrolyzer cells (PEMECs) has a significant effect on their performance and durability. In this study, 316 stainless steel (SS) mesh was used as a model liquid/gas diffusion layer material to investigate the migration of corrosion products in the catalyst-coated membrane of a PEMEC. Iron and nickel cation particles were found distributed throughout the anode catalyst layer, proton exchange membrane, and cathode catalyst layer, as revealed by scanning transmission electron microscopy and energy dispersive X-ray spectroscopy. The results indicate the corrosion products of 316 SS are transported from anode to cathode through the nanochannels of the Nafion membrane, resulting in impeded proton transport and overall PEMEC performance loss.

Original languageAmerican English
Pages (from-to)27343-27349
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number44
DOIs
StatePublished - 2 Nov 2017

Bibliographical note

Publisher Copyright:
© 2017 Hydrogen Energy Publications LLC

NREL Publication Number

  • NREL/JA-4A00-70283

Keywords

  • Corrosion
  • Migration
  • Nafion
  • Proton exchange membrane
  • Stainless steel

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