In situ synchrotron far infrared micro-spectroelectrochemistry with a grazing angle objective

Hahn, F.; Mathis, Yves‐Laurent; Bonnefont, A.; Maillard, Frédéric; Melendres, C. A.

doi:10.1016/j.infrared.2007.12.017

Cited by 2 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Synchrotron-sourced FIR spectroscopy has been applied in studies of thin films at metallic substrates such as copper and gold (Melendres et al, 1998(Melendres et al, , 2000Melendres & Hahn, 1999;Hahn & Melendres, 2010). Of these studies, few have used accessories that utilize a selectable angle of incidence at which the infrared beam approaches the surface (Hahn et al, 2007(Hahn et al, , 2008. It has been shown that the increase of the incidence angle can enhance the absorption intensity at microscopically smooth surfaces with the best result achieved using a polarized beam at high angles of incidence close to the grazing angle (Francis & Ellison, 1959;Greenler, 1966).…”

Section: Introductionmentioning

confidence: 99%

Synchrotron far-infrared spectroscopy of corroded steel surfaces using a variable angle of incidence

Lepková

Bronswijk

Pandarinathan

et al. 2014

J Synchrotron Radiat

View full text Add to dashboard Cite

Far-infrared spectroscopy, using a synchrotron source, has been used to study carbon steel corroded in CO2-saturated brine in the presence and absence of the corrosion inhibitor 2-mercaptopyrimidine (MPY), which allowed the steel surface roughness to be modified. The effect of the angle of incidence (θi, 30-80°) on the band intensity and observed bands of the spectra from these surfaces has been determined. For the MPY-treated steel (low surface roughness) the highest band intensity is observed at high θi (80°) and different bands were observed at different θi. In contrast, for the MPY-free steel (high surface roughness) the highest band intensity is observed at low θi (30°) and spectral content changes were not observed. The results are explained in terms of the roughness of the MPY-treated and MPY-free steels, and their effect on the level of diffusely reflected light of the incident infrared beam.

show abstract

Section: Introductionmentioning

confidence: 99%

Synchrotron far-infrared spectroscopy of corroded steel surfaces using a variable angle of incidence

Lepková

Bronswijk

Pandarinathan

et al. 2014

J Synchrotron Radiat

View full text Add to dashboard Cite

show abstract

“…To the best of our knowledge, the only previous reports of coupling synchrotron IR radiation with electrochemistry are the nondynamic studies of Melendres and co-workers. These authors have primarily used far-IR synchrotron radiation to study processes related to copper oxidation − and ion adsorption on gold, , silver, and platinum electrodes. , In this work, we have chosen a simple redox probe (ferrocyanide) to dynamically study the diffusion processes occurring at a relatively small electrode (500 μm diameter) in a thin cavity cell. Time-resolved experimental techniques have been employed that allow the use of synchrotron infrared radiation (SIR) for electrochemical external reflectance spectroscopy (SIR-EERS) studies.…”

mentioning

confidence: 99%

Synchrotron Infrared Radiation for Electrochemical External Reflection Spectroscopy: A Case Study Using Ferrocyanide

et al. 2011

View full text Add to dashboard Cite

Synchrotron infrared radiation has been successfully coupled through an infrared (IR) microscope to a thin-cavity external reflectance cell to study the diffusion controlled redox of a ferrocyanide solution. Excellent signal-to-noise ratios were achieved even at aperture settings close to the diffraction limit. Comparisons of noise levels as a function of aperture size demonstrate that this can be attributed to the high brilliance of synchrotron radiation relative to a conventional thermal source. Time resolved spectroscopic studies of diffusion controlled redox behavior have been measured and compared to purely electrochemical responses of the thin-cavity cell. Marked differences between the two measurements have been explained by analyzing diffusion in both the axial (linear) and radial dimensions. Whereas both terms contribute to the measured current and charge, only species that originate in the volume element above the electrode and diffuse in the direction perpendicular to the electrode surface are interrogated by IR radiation. Implications for the use of ultramicroelectrodes and synchrotron IR (SIR) to study electrochemical processes in the submillisecond time domain are discussed.

show abstract

In situ synchrotron far infrared micro-spectroelectrochemistry with a grazing angle objective

Cited by 2 publications

References 10 publications

Synchrotron far-infrared spectroscopy of corroded steel surfaces using a variable angle of incidence

Synchrotron far-infrared spectroscopy of corroded steel surfaces using a variable angle of incidence

Synchrotron Infrared Radiation for Electrochemical External Reflection Spectroscopy: A Case Study Using Ferrocyanide

Contact Info

Product

Resources

About