Corrosion Study of Cr-Oxide Ceramics Using Rotating Ring Disk Electrode

Filippo Fenini; Kent Kammer Hansen; Mogens Bjerg Mogensen

doi:10.1149/2.0191911jes

Corrosion Study of Cr-Oxide Ceramics Using Rotating Ring Disk Electrode

Filippo Fenini, Kent Kammer Hansen, Mogens Bjerg Mogensen^*

^*Corresponding author for this work

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

Proton Exchange Membrane Electrolysis demands new resistant and cheap materials for the anode components, and Cr-based spinels are acid stable ceramics, which may meet the requirements of such application to some extent. This work reports the electrochemical behavior of spinel-structured MnCu_0.25Cr_1.75O₄ and NiCr₂O₄up to 2.0 V in order to determine the stability/dissolution of such materials when exposed to anodic potential. The ceramic/graphite composite was deposited on a rotating ring disk electrode and scanned while the ring electrode was held at 0.5 V vs SHE. The dissolution of Cr species was observed to happen as the oxidation proceeded by collecting the dissolved products at the ring electrode. HCrO₄⁻ and MnO₄⁻ were identified as dissolved products. Analysis of post-test solutions, revealed the difference between chemical and electrochemical corrosion of the materials.

Original language	English
Journal	Journal of The Electrochemical Society
Volume	166
Issue number	11
Pages (from-to)	C3159-C3169
ISSN	0013-4651
DOIs	https://doi.org/10.1149/2.0191911jes
Publication status	Published - 2019

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title = "Corrosion Study of Cr-Oxide Ceramics Using Rotating Ring Disk Electrode",

abstract = "Proton Exchange Membrane Electrolysis demands new resistant and cheap materials for the anode components, and Cr-based spinels are acid stable ceramics, which may meet the requirements of such application to some extent. This work reports the electrochemical behavior of spinel-structured MnCu0.25Cr1.75O4 and NiCr2O4 up to 2.0 V in order to determine the stability/dissolution of such materials when exposed to anodic potential. The ceramic/graphite composite was deposited on a rotating ring disk electrode and scanned while the ring electrode was held at 0.5 V vs SHE. The dissolution of Cr species was observed to happen as the oxidation proceeded by collecting the dissolved products at the ring electrode. HCrO4− and MnO4− were identified as dissolved products. Analysis of post-test solutions, revealed the difference between chemical and electrochemical corrosion of the materials. ",

author = "Filippo Fenini and {Kammer Hansen}, Kent and Mogensen, {Mogens Bjerg}",

year = "2019",

doi = "10.1149/2.0191911jes",

language = "English",

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pages = "C3159--C3169",

journal = "Journal of The Electrochemical Society",

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publisher = "The Electrochemical Society",

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T1 - Corrosion Study of Cr-Oxide Ceramics Using Rotating Ring Disk Electrode

AU - Fenini, Filippo

AU - Kammer Hansen, Kent

AU - Mogensen, Mogens Bjerg

PY - 2019

Y1 - 2019

N2 - Proton Exchange Membrane Electrolysis demands new resistant and cheap materials for the anode components, and Cr-based spinels are acid stable ceramics, which may meet the requirements of such application to some extent. This work reports the electrochemical behavior of spinel-structured MnCu0.25Cr1.75O4 and NiCr2O4 up to 2.0 V in order to determine the stability/dissolution of such materials when exposed to anodic potential. The ceramic/graphite composite was deposited on a rotating ring disk electrode and scanned while the ring electrode was held at 0.5 V vs SHE. The dissolution of Cr species was observed to happen as the oxidation proceeded by collecting the dissolved products at the ring electrode. HCrO4− and MnO4− were identified as dissolved products. Analysis of post-test solutions, revealed the difference between chemical and electrochemical corrosion of the materials.

AB - Proton Exchange Membrane Electrolysis demands new resistant and cheap materials for the anode components, and Cr-based spinels are acid stable ceramics, which may meet the requirements of such application to some extent. This work reports the electrochemical behavior of spinel-structured MnCu0.25Cr1.75O4 and NiCr2O4 up to 2.0 V in order to determine the stability/dissolution of such materials when exposed to anodic potential. The ceramic/graphite composite was deposited on a rotating ring disk electrode and scanned while the ring electrode was held at 0.5 V vs SHE. The dissolution of Cr species was observed to happen as the oxidation proceeded by collecting the dissolved products at the ring electrode. HCrO4− and MnO4− were identified as dissolved products. Analysis of post-test solutions, revealed the difference between chemical and electrochemical corrosion of the materials.

U2 - 10.1149/2.0191911jes

DO - 10.1149/2.0191911jes

M3 - Journal article

VL - 166

SP - C3159-C3169

JO - Journal of The Electrochemical Society

JF - Journal of The Electrochemical Society

SN - 0013-4651

IS - 11

ER -

Corrosion Study of Cr-Oxide Ceramics Using Rotating Ring Disk Electrode

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