Surface-Enhanced Raman Scattering Spectroscopy Studies on the Inhibition Mechanism of Propargyl Alcohol for Iron Corrosion in Hydrochloric Acid

Aramaki, Kunitsugu; Fujioka, E.

doi:10.5006/1.3292107

Cited by 20 publications

(6 citation statements)

References 1 publication

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“…Several methods have been undertaken to obtain vibrational information about iron−inhibitor interactions. For instance, the SERS spectra of a small number of inhibitors have been obtained from iron films electrodeposited onto a SERS-active silver substrate on the basis of the electromagnetic enhancement mechanism. − Aramaki and co-workers used this method to examine the adsorption on iron of sulfide, which was also investigated by Xue et al, pyridine, propargyl alcohol, benzenethiol, aniline, and their derivatives .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and Surface-Enhanced Raman Spectroscopy Studies on Inhibition of Iron Corrosion by Benzotriazole

2002

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The different initial interactions of benzotriazole (BTAH) with iron in both 0.5 M H2SO4 and simulated saline water (3.4% NaCl) have been investigated systematically by using a confocal microprobe Raman system, surface-enhanced Raman spectroscopy (SERS), and electrochemical potentiodynamic polarization curves. The SERS spectra of BTAH at the bare iron electrodes in both 0.5 M H2SO4 and simulated saline water have been obtained successfully for the first time. Electrochemical measurements show that the inhibition efficiency of BTAH is higher in saline water than that in acid solution, which is in accordance with the identification of the surface interaction on the basis of the SERS data. BTAH may be physisorbed onto the iron surface through its neutral molecule form or protonated BTAH2 + ions. While in saline water, the formation of the surface coordination compound characterized as Fe(II)-BTA may contribute to the outstanding spectral features. A cleavage of the NH bond is believed to occur while adsorption of BTAH onto iron proceeds. This more compact surface film results in a higher inhibition efficiency in comparison with that in an acid solution.

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Section: Introductionmentioning

confidence: 99%

Electrochemical and Surface-Enhanced Raman Spectroscopy Studies on Inhibition of Iron Corrosion by Benzotriazole

2002

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“…Several strategies have been developed to extend SERS to other surface materials, particularly the transition metals of Pt, Ni, and Fe which are widely used in industry. These strategies involve (i) deposition of an ultrathin transition metal, e.g., Fe film with several atomic monolayers onto a SERS active Ag (or Au) electrode, − (ii) deposition of SERS active Ag microislands onto Fe substrates, which has been applied in the study of the passive film of iron, − (iii) deposition of a rough and thick Fe film of few micrometer thickness at non-SERS active substrates such as glassy carbon electrodes …”

Section: Introductionmentioning

confidence: 99%

Potential Dependence of the Orientation of Thiocyanate Adsorbed on an Iron Electrode as Probed by Surface-Enhanced Raman Spectroscopy

et al. 2002

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Surface-enhanced Raman spectroscopy has been extended successfully to the study of a bare iron electrode (without any deposition of other noble metals) exposed to the neutral solution containing thiocyanate over a wide potential range from -1.8 to -0.4 V. The applied potential has a significant influence on the Raman frequency shift of SCNas a result of the electrochemical Stark effect. Both N-and S-coordination modes were observed. Results show that at large negative potentials N-bound SCNis favored, whereas at relatively positive potentials, S-bound thiocyanate predominates the iron surface. A sudden change in the dν CN /dE value is observed at potentials from ca. -0.75 to -1.1 V and is evidenced for the transition from N-bound thiocyanate to S-bound species.

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“…Of particular interest and also importance in further developing the SERS technique is the extension to the study of transition metals such as platinum used in electrocatalysis in many technologically important processes. The strategies involve coating onto SERS-active Ag or Au electrodes with ultrathin films of platinum or other transition metals by means of electrochemical deposition. Valuable information has been obtained by this unique method.…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Electro-Oxidation of Carbon Monoxide at the Platinum−Acetonitrile Interface as Probed by Surface-Enhanced Raman Spectroscopy

et al. 2002

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The vibrational spectrum of carbon monoxide at the Pt/acetonitrile interface as a function of applied potential has been investigated using the surface-enhanced Raman spectroscopy technique. The electrolyte is 0.1 M LiClO4. The bands observed at ca. 506 and 2055 cm-1 are attributed to the platinum−CO (νPt - C) and intramolecular C−O (νC - O) stretching vibrations, respectively, suggesting linearly adsorbed CO on platinum. The νPt - C band has an experimental Stark tuning rate of −4 cm-1/V, while the slope of νC - O band frequency versus potential approaches zero before the onset of electro-oxidation of COads, possibly resulting from low surface coverage of CO on platinum. The roughened Pt electrode surface has a high electrocatalytic activity, on which CO electro-oxidation occurs at ca. −0.7 V (vs Ag/Ag+). The main product of COads oxidation is confirmed to be carbonate due to the existence of trace water in the double-layer region as a source of oxygen for the reaction. It has also been found that the solvent acetonitrile can exert a chemisorbed decomposition reaction on the roughened Pt surface, while the adsorption of CO can significantly inhibit this reaction.

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Surface-Enhanced Raman Scattering Spectroscopy Studies on the Inhibition Mechanism of Propargyl Alcohol for Iron Corrosion in Hydrochloric Acid

Cited by 20 publications

References 1 publication

Electrochemical and Surface-Enhanced Raman Spectroscopy Studies on Inhibition of Iron Corrosion by Benzotriazole

Electrochemical and Surface-Enhanced Raman Spectroscopy Studies on Inhibition of Iron Corrosion by Benzotriazole

Potential Dependence of the Orientation of Thiocyanate Adsorbed on an Iron Electrode as Probed by Surface-Enhanced Raman Spectroscopy

Adsorption and Electro-Oxidation of Carbon Monoxide at the Platinum−Acetonitrile Interface as Probed by Surface-Enhanced Raman Spectroscopy

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