Characterization of copper oxidation by linear potential sweep voltammetry and UV-Visible-NIR diffuse reflectance spectroscopy

Lenglet, M.; Kartouni, K.; Delahaye, Daniel

doi:10.1007/bf01034048

Cited by 57 publications

(37 citation statements)

References 17 publications

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“…S5 in the Supporting Information). The dark electrochemical reduction of dioxygen starts below −0.1 V, and the reduction of Cu(II) to Cu(I) in CuO sets on at −0.4 V . In the absence of H 2 O 2 , the cathodic photocurrents can be ascribed to the reduction of protons or Cu(II) to Cu(I) rather than to the reduction of dioxygen since the difference between photocurrents in deaerated and aerated solutions is negligible.…”

Section: Resultsmentioning

confidence: 99%

Photoelectrochemical versus Electrochemical Detection of H₂O₂ Using an All‐inorganic Sensor Based on Nanostructured Copper Oxide

et al. 2016

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Section: Resultsmentioning

confidence: 99%

Photoelectrochemical versus Electrochemical Detection of H₂O₂ Using an All‐inorganic Sensor Based on Nanostructured Copper Oxide

et al. 2016

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“…The highest intensity for the cuprite band was found in acetic acid exposures, and the lowest in propionic exposures. [57][58] . The total calculated thickness of both phases was obtained by assuming homogeneous layers, a complete reduction of both oxides, and a density of 6.0 g cm -3 for both oxides.…”

Section: Quantitative and Qualitative Differences For Copper (I) Oxidmentioning

confidence: 99%

Initial Atmospheric Corrosion of Copper Induced by Carboxylic Acids

Gil

Leygraf

2007

J. Electrochem. Soc.

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The interaction of carboxylic acids with copper is a phenomenon found both outdoors and, more commonly, indoors. The influence on copper of some carboxylic acids (formic, acetic, propionic, and butyric) have so far been studied at concentrations levels at least three or four orders of magnitude higher than actual indoor conditions (< 20 ppb, volume parts per billion), and with only limited emphasis on any mechanistic approach. In this licentiate study a unique analytical setup has been successfully applied for in situ characterization and quantification of corrosion products formed during initial atmospheric corrosion of copper in the presence of acetic, formic or propionic acid. The setup is based on monitoring mass changes by the quartz crystal microbalance (QCM) and simultaneously identifying the chemical species by infrared reflection-absorption spectroscopy (IRAS). Post-analysis of corrosion products was performed by coulometric reduction (mass of copper (I) oxide formed), grazing incidence xray diffraction (phase identification) and atomic force microscopy (surface topography). The absolute amounts of mass of individual constituents in the corrosion products, mainly copper (I) oxide or cuprite, copper (II) carboxylate and water or hydroxyl groups, have been deduced in situ during exposure in 120 ppb of carboxylic acid concentration, 95% relative humidity and 20ºC. An overall result is the consistency of analytical information obtained. For copper (I) oxide the quantified data estimated from IRAS, QCM or coulomeric reduction agrees with a relative accuracy of 12 % or better. The interaction of copper with the carboxylic acids seems to follow two spatially separated main pathways. A proton-induced dissolution of cuprous ions followed by the formation of copper (I) oxide, and a carboxylate-induced dissolution followed by the formation of copper (II) carboxylate. The first pathway is initially very fast but levels off with a more uniform growth over the surface. This pathway dominates in acetic acid. The second pathway exhibits iii a more constant growth rate and localized growth, and dominates in formic acid. Propionic acid exhibits low rates for both pathways. The difference between the carboxylic acids with respect to both total corrosion rate and carboxylate-induced dissolution can be attributed to differences in acid dissociation constant and deposition velocity.

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“…The other spectra in Figure 11 indicate the dominance of the weakly interacting species over an oxidic form which is, however, neither bulk Cu 2 O nor the species seen in Figure 9. Electrochemical studies [27] revealed modified spectral parameters of mixed-valence sub-oxides occurring during oxidation of bulk copper in a surface-near region in contact with bulk metal. Such Cu x O compounds are candidates for the species seen here with in situ XAS.…”

Section: In Situ O K Edge Spectramentioning

confidence: 99%

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Knop‐Gericke

Hävecker

Schedel‐Niedrig

et al. 2000

Topics in Catalysis

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An instrumentation is presented allowing to study the X-ray absorption edge spectra of light elements (z =3-15) in the surface-sensitive Auger yield detection at elevated pressures (mbar range). Heterogeneous catalysts can be studied for their surface electronic structure under working conditions in a flow-through reactor mode. An example of methanol oxidation to formaldehyde over copper metal is studied in detail. A new form of weakly bonded atomic oxygen was found which only exists under reaction conditions. Its existence is linked to defect sites on the Cu. Several mechanistic predictions from earlier low pressure studies could be verified with this in situ experiment.

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Characterization of copper oxidation by linear potential sweep voltammetry and UV-Visible-NIR diffuse reflectance spectroscopy

Cited by 57 publications

References 17 publications

Photoelectrochemical versus Electrochemical Detection of H₂O₂ Using an All‐inorganic Sensor Based on Nanostructured Copper Oxide

Photoelectrochemical versus Electrochemical Detection of H₂O₂ Using an All‐inorganic Sensor Based on Nanostructured Copper Oxide

Initial Atmospheric Corrosion of Copper Induced by Carboxylic Acids

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Characterization of copper oxidation by linear potential sweep voltammetry and UV-Visible-NIR diffuse reflectance spectroscopy

Cited by 57 publications

References 17 publications

Photoelectrochemical versus Electrochemical Detection of H2O2 Using an All‐inorganic Sensor Based on Nanostructured Copper Oxide

Photoelectrochemical versus Electrochemical Detection of H2O2 Using an All‐inorganic Sensor Based on Nanostructured Copper Oxide

Initial Atmospheric Corrosion of Copper Induced by Carboxylic Acids

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Photoelectrochemical versus Electrochemical Detection of H₂O₂ Using an All‐inorganic Sensor Based on Nanostructured Copper Oxide

Photoelectrochemical versus Electrochemical Detection of H₂O₂ Using an All‐inorganic Sensor Based on Nanostructured Copper Oxide