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Title: Electrochemical investigation of stainless steel corrosion in a proton exchange membrane electrolyzer cell

Journal Article · · International Journal of Hydrogen Energy
 [1];  [1]; ORCiD logo [1];  [2];  [2];  [2]
  1. Univ. of Tennessee Space Inst. (UTSI), Tullahoma, TN (United States). Nanodynamics and High-Efficiency Lab for Propulsion and Power, Department of Mechanical, Aerospace & Biomedical Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

The lack of a fundamental understanding of the corrosion mechanisms in the electrochemical environments of proton exchange membrane (PEM) electrolyzer and/or fuel cells (ECs/FCs) has seriously hindered the improvement of performance and efficiency of PEM ECs/FCs. In this study, a stainless steel mesh was purposely used as an anode gas diffusion layer that was intentionally operated with high positive potentials under harsh oxidative environments in a PEMEC to study the corrosion mechanism of metal migration. A significant amount of iron and nickel cations were determined to transport through the anode catalyst layer, the PEM and the cathode catalyst layer during the PEMEC operation. The formation/deposition of iron oxide and nickel oxide on the carbon paper gas diffusion layer at the cathode side is first revealed by both scanning electron microscope and X-ray diffraction. The results indicate the corrosion elements of iron and nickel are transported from anode to cathode through the catalyst-coated membrane, and deposited on carbon fibers as oxides. This phenomenon could also open a new corrosion-based processing approach to potentially fabricate multifunctional oxide structures on carbon fiber devices. This study has demonstrated a new accelerated test method for investigating the corrosion and durability of metallic materials as well.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center (FEERC); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). National Transportation Research Center (NTRC)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Fuel Cell Technologies Office
Grant/Contract Number:
FE0011585; EE0000276; AC05-00OR22725
OSTI ID:
1213323
Alternate ID(s):
OSTI ID: 1247879
Journal Information:
International Journal of Hydrogen Energy, Vol. 40, Issue 36; ISSN 0360-3199
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 44 works
Citation information provided by
Web of Science

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Degradation in photoelectrochemical devices: review with an illustrative case study journal February 2017
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Critical Review—Identifying Critical Gaps for Polymer Electrolyte Water Electrolysis Development journal January 2017
CO2-assisted regeneration of a polymer electrolyte water electrolyzer contaminated with metal ion impurities text January 2019