In Situ FTIR Spectroscopy of Iron Electrodes in Alkaline Solutions: I . Internal Reflection Spectroscopy

Neugebauer, Helmut; Moser, Andreas; Strecha, Peter; Neckel, A.

doi:10.1149/1.2086692

Cited by 28 publications

(14 citation statements)

References 21 publications

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“…One of the first in-situ investigations that has been published so far was performed by Geronov et al using Mössbauer spectroscopy in 5M KOH, identifying Fe(OH) 2 and β -FeOOH as the main discharge products of the first and the second discharge plateau, respectively [231]. The latter is in excellent agreement with subsequent findings by Neugebauer et al, who investigated the electrochemical reactions of iron in 5M KOH via in-situ ATR-FTIR spectroscopy observing the formation of Fe(OH) 2 and β-FeOOH as well [242]. Huang et al investigated the oxidation of iron via in-situ optical ellipsometry, discovering evidence for a bilayer structure of the passive film consisting of Fe 3 O 4 on the inside and α-FeOOH rather than Fe 2 O 3 on the outside after repeated galvanostatic charge-/discharge between Fe and Fe(III) in 1M NaOH [240].…”

Section: Iron-air Batteriessupporting

confidence: 80%

Silicon and Iron as Resource-Efficient Anode Materials for Ambient-Temperature Metal-Air Batteries: A Review

et al. 2019

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Metal-air batteries provide a most promising battery technology given their outstanding potential energy densities, which are desirable for both stationary and mobile applications in a “beyond lithium-ion” battery market. Silicon- and iron-air batteries underwent less research and development compared to lithium- and zinc-air batteries. Nevertheless, in the recent past, the two also-ran battery systems made considerable progress and attracted rising research interest due to the excellent resource-efficiency of silicon and iron. Silicon and iron are among the top five of the most abundant elements in the Earth’s crust, which ensures almost infinite material supply of the anode materials, even for large scale applications. Furthermore, primary silicon-air batteries are set to provide one of the highest energy densities among all types of batteries, while iron-air batteries are frequently considered as a highly rechargeable system with decent performance characteristics. Considering fundamental aspects for the anode materials, i.e., the metal electrodes, in this review we will first outline the challenges, which explicitly apply to silicon- and iron-air batteries and prevented them from a broad implementation so far. Afterwards, we provide an extensive literature survey regarding state-of-the-art experimental approaches, which are set to resolve the aforementioned challenges and might enable the introduction of silicon- and iron-air batteries into the battery market in the future.

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Section: Iron-air Batteriessupporting

confidence: 80%

Silicon and Iron as Resource-Efficient Anode Materials for Ambient-Temperature Metal-Air Batteries: A Review

et al. 2019

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“…One of the first in-situ investigations that has been published so far was performed by Geronov et al using Mössbauer spectroscopy in 5M KOH, identifying Fe(OH)2 and β-FeOOH as the main discharge products of the first and the second discharge plateau, respectively [231]. The latter is in excellent agreement with subsequent findings by Neugebauer et al, who investigated the electrochemical reactions of iron in 5M KOH via in-situ ATR-FTIR spectroscopy observing the formation of Fe(OH)2 and β-FeOOH as well [242]. Huang et al investigated the oxidation of iron via in-situ optical ellipsometry, discovering evidence for a bilayer structure of the passive film consisting of Fe3O4 on the inside and α-FeOOH rather than Fe2O3 on the outside after repeated galvanostatic charge-/discharge between Fe and Fe(III) in 1M NaOH [240].…”

Section: Isupporting

confidence: 78%

Silicon and Iron as Resource-Efficient Anode Materials for Ambient-Temperature Metal-Air Batteries: A Review

Weinrich¹,

Durmus²,

Tempel³

et al. 2019

Preprint

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Metal-air batteries provide a most promising battery technology given their outstanding potential energy densities, which are desirable for both stationary and mobile applications in a ‘beyond lithium-ion’ battery market. Silicon- and iron-air batteries underwent less research and development compared to lithium- and zinc-air batteries. Nevertheless, in the recent past, the two also-ran battery systems made considerable progress and attracted rising research interest due to the excellent resource-efficiency of silicon and iron. Silicon and iron are among the top five of the most abundant elements in the earth’s crust, which ensures almost infinite material supply of the anode materials, even for large scale applications. Furthermore, primary silicon-air batteries are set to provide one of the highest energy densities among all batteries, while iron-air batteries are frequently considered as a highly rechargeable system with decent performance characteristics. Considering fundamental aspects for the anode materials, i.e., the metal electrodes, in this review, we will first outline the challenges, which explicitly apply to silicon- and iron-air batteries and prevented them from a broad implementation so far. Afterwards, we provide an extensive literature survey regarding state-of-the-art experimental approaches, which are set to resolve the aforementioned challenges and might enable the introduction of silicon- and iron-air batteries into the battery market in the future.

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“…The peak at ca. 2950 cm À1 can be assigned to the m(O-H) stretching vibration of Co(OH) 2 , the typical corrosion product of Co in the relevant environment [6,7]. Similar features appear over the whole investigated poten- tial range.…”

Section: Resultsmentioning

confidence: 60%

An in‐situ FT‐IR investigation of the anodic behaviour of WC‐Co hardmetal

Bozzini¹,

Gaudenzi²,

Mele

2003

Materials & Corrosion

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An in-situ FT-IR spectroelectrochemical and voltammetric study of the corrosion of a WC-Co hardmetal grade is reported in this communication. A slightly acidic sulphate solution is considered. The potential-and time-dependent anodic formation of CO 2 and Co(OH) 2 can be followed with the variation of the vibrational spectra. The formation of CO 2 occurs at the same potential at which tungsten oxidation starts to be detected and the breakdown of passivity can be observed by electrochemical methods. Our results suggest that a threshold potential exists for the oxidation of WC in WCCo, giving rise to the concomitant oxidation of tungsten and carbon at more noble potentials than those typical for the oxidation of the individual elements.Der nachfolgende Beitrag berichtet über eine in-situ FT-IR-spektroelektrochemische und voltammetrische Untersuchung der Korrosion einer WC-Co-Hartmetallgüte. Dabei wird eine schwach saure Sulfatlösung betrachtet. Die potential-und zeitabhängige anodische Bildung von CO 2 und Co(OH) 2 kann mit der Veränderung der Schwingungsspektren verfolgt werden. Die Bildung von CO 2 erfolgt bei dem selben Potential, ab dem die Wolframoxidation detektiert und der Zusammenbruch der Passivität mit elektrochemischen Methoden beobachtet werden kann. Aus unseren Ergebnissen kann der Schluss gezogen werden, dass für die Oxidation von WC in WC-Co ein Potentialgrenzwert existiert, was zur gleichzeitigen Oxidation von Wolfram und Kohlenstoff bei edleren Potentialen führt, als es typischerweise für die Oxidation der einzelnen Elemente ist.

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In Situ FTIR Spectroscopy of Iron Electrodes in Alkaline Solutions: I . Internal Reflection Spectroscopy

Cited by 28 publications

References 21 publications

Silicon and Iron as Resource-Efficient Anode Materials for Ambient-Temperature Metal-Air Batteries: A Review

Silicon and Iron as Resource-Efficient Anode Materials for Ambient-Temperature Metal-Air Batteries: A Review

Silicon and Iron as Resource-Efficient Anode Materials for Ambient-Temperature Metal-Air Batteries: A Review

An in‐situ FT‐IR investigation of the anodic behaviour of WC‐Co hardmetal

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