Recent insights in corrosion science from atomic spectroelectrochemistry

Choudhary, S.; Ogle, K.; Gharbi, Oumaïma; Thomas, Sebastian; Birbilis, Nick

doi:10.1002/elsa.202100196

Cited by 14 publications

(2 citation statements)

References 117 publications

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“…The studied Ni–Cr–Mo alloy is active toward OER, which also triggers the passivity breakdown . Therefore, to study the corrosion of alloys at high anodic potentials, standard electrochemical techniques used in the corrosion community have been combined with complementary techniques such as neutron reflectivity, X-ray diffraction, ambient pressure XPS, , and inductively coupled plasma-mass spectrometry (ICP–MS) . However, these techniques are lacking spatial resolution.…”

Section: Discussionmentioning

confidence: 99%

Operando Surface Optical Reflectance Microscopy Study of Corrosion Film Growth on a Ni–Cr–Mo Alloy During Anodic Polarization

Larsson,

Vorobyova,

Pfaff

et al. 2023

J. Phys. Chem. C

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The solid–liquid interface, where corrosion reactions occur, is notoriously difficult to study in operando conditions. Few experimental techniques can provide surface sensitivity and spatial and temporal resolution and are compatible with liquid environments. 2-Dimensional surface optical reflectance (2D-SOR) is an emerging optical technique providing microscopic information with high temporal resolution. It complements methods such as ambient pressure X-ray photoelectron spectroscopy or inductively coupled plasma-mass spectrometry, which provides valuable chemical information from the surface and the dissolving species but lacks spatial resolution. Here, we show how 2D-SOR can be used to measure the formation and growth of corrosion products in operando through oscillations in the reflected signal caused by constructive and destructive interference of the light in the film of growing corrosion products. The total thickness of the corrosion product film obtained with 2D-SOR agrees well with that measured using scanning electron microscopy ex situ. 2D-SOR has proved to be an excellent and valuable tool for monitoring the corrosion process with spatial resolution in operating conditions.

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Section: Discussionmentioning

confidence: 99%

Operando Surface Optical Reflectance Microscopy Study of Corrosion Film Growth on a Ni–Cr–Mo Alloy During Anodic Polarization

Larsson,

Vorobyova,

Pfaff

et al. 2023

J. Phys. Chem. C

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“…In this scenario, conducting in-situ film composition analysis is crucial, as exposure to air and dehydration have the potential to induce alterations in composition via phase transformations. Therefore, in-situ methods, including synchrotron X-ray techniques for film composition analysis, 40,41 ASEC for dissolution kinetics, 42,43 and liquid-cell TEM for spatially resolved compositional and structural insights, 30 employed either individually or in combination, hold promise for advancing corrosion science beyond its current boundaries (Fig. 2b).…”

Section: Choudhary and Junmentioning

confidence: 99%

Reports From the Frontier: The Need for a Better Understanding of Passive Films

Choudhary,

Cushing

2024

Electrochem. Soc. Interface

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Transpassive Metallauflösung vs. Sauerstoffentwicklung: Auswirkungen auf Legierungsstabilität und Elektrokatalyse

Wetzel,

Morell,

von der Au

et al. 2024

Angewandte Chemie

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Multi‐principal element alloys (MPEAs) are gaining interest in corrosion and electrocatalysis research due to their electrochemical stability across a broad pH range and the design flexibility they offer. Using the equimolar CrCoNi alloy, we observe significant metal dissolution in a corrosive electrolyte (0.1 M NaCl, pH 2) concurrently with the oxygen evolution reaction (OER) in the transpassive region despite the absence of hysteresis in polarization curves or other obvious corrosion indicators. We present a characterization scheme to delineate the contribution of OER and alloy dissolution, using scanning electrochemical microscopy (SECM) for OER‐onset detection, and quantitative chemical analysis with inductively coupled‐mass spectrometry (ICP‐MS) and ultraviolet visible light (UV‐Vis) spectroscopy to elucidate metal dissolution processes. In‐situ electrochemical atomic force microscopy (EC‐AFM) revealed that the transpassive metal dissolution on CrCoNi is dominated by intergranular corrosion. These results have significant implications for the stability of MPEAs in corrosion systems, emphasizing the necessity of analytically determining metal ions released from MPEA electrodes into the electrolyte when evaluating Faradaic efficiencies of OER catalysts. The release of transition metal ions not only reduces the Faradaic efficiency of electrolyzers but may also cause poisoning and degradation of membranes in electrochemical reactors.

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Recent insights in corrosion science from atomic spectroelectrochemistry

Cited by 14 publications

References 117 publications

Operando Surface Optical Reflectance Microscopy Study of Corrosion Film Growth on a Ni–Cr–Mo Alloy During Anodic Polarization

Operando Surface Optical Reflectance Microscopy Study of Corrosion Film Growth on a Ni–Cr–Mo Alloy During Anodic Polarization

Reports From the Frontier: The Need for a Better Understanding of Passive Films

Transpassive Metallauflösung vs. Sauerstoffentwicklung: Auswirkungen auf Legierungsstabilität und Elektrokatalyse

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