In-situ FT-IR spectroscopic study of bisulfate and sulfate adsorption on platinum electrodes

Kunimatsu, K.; Samant, Mahesh G.; Seki, H.

doi:10.1016/0022-0728(89)85170-8

Cited by 123 publications

(97 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At QO(E)/2QH = 0 all curves reach virtually the same mass value, ca 9 g (mol Pt) −1 ; this implies that the total mass change in the region of H desorption and double layer region does not vary with acid concentration. This is an interesting result, particularly in view of the fact that it has been established [18][19][20][21][22][23][24] that sulfate species adsorb on Pt in the range from ca 0.1 to 1.1 V, reaching a maximum around 0.6-0.8 V, with increasing concentration more sulfate is adsorbed. At higher potentials ( q 1 V) sulfate ions are included in the oxide layer.…”

Section: Mass-potential Behaviour In H2so4 Electrolytementioning

confidence: 75%

“…At the beginning of oxygen coverage there is already a mass increase of ca 9 g (mol Pt) −1 compared with the state at 0.03 V. Another approach is therefore to consider the total difference in mass between the surface covered with an oxygen monolayer and the initial state at 0.03 V. The question then is whether the reference state at 0.03 V is adequately represented by a hydrogen monolayer (PtH). IR spectroscopy studies on adsorbed hydrogen have proved the presence of water [26,27]. Bewick and Russell [26] suggest a model for a particular water structure on adsorbed hydrogen in which dimers of water molecules are present on the W. Visscher et al 538 and/or perchlorate on the oxygen layer.…”

Section: The Anion Effect On the Mass-potential Behaviourmentioning

confidence: 99%

See 1 more Smart Citation

Electrochemical quartz crystal microbalance measurements of CO adsorption and oxidation on Pt in various electrolytes

Visscher

Gootzen

Cox

et al. 1998

Electrochimica Acta

View full text Add to dashboard Cite

Abstract-The adsorption behaviour of Pt was investigated with the electrochemical quartz microbalance during potential scanning in acid electrolytes. From the mass increase with potential it is concluded that in the potential range of hydrogen desorption and double layer both water and anions are adsorbed in H2SO4 and H3PO4, whereas in HClO4 there is only adsorption of water molecules. The mass changes in the oxygen region indicate that anions are included in the oxide layer. The Pt/COads system was studied in H2SO4, HClO4 and H3PO4. The presence of adsorbed CO is observed as a mass increase with respect to the CO-free system. The results show that water is adsorbed on top of the adsorbed CO layer at low potentials. Moreover, it can be concluded from the mass-balance data that water molecules are attached to the hydrogen monolayer at 0.03 V vs R.H.E. in sulfuric and perchloric acid, but not in phosphoric acid. 7 1997

show abstract

Section: Mass-potential Behaviour In H2so4 Electrolytementioning

confidence: 75%

Section: The Anion Effect On the Mass-potential Behaviourmentioning

confidence: 99%

Electrochemical quartz crystal microbalance measurements of CO adsorption and oxidation on Pt in various electrolytes

Visscher

Gootzen

Cox

et al. 1998

Electrochimica Acta

View full text Add to dashboard Cite

show abstract

“…For example, the dependence for CO on Pt is 30cm -1 V -1 for ν(C-O) [46] and -10 cm -1 V -1 for ν(Pt-CO) [47] , and that for (bi)sulfate on Pt in acidic solution is ~100 cm -1 V -1 (for the band around 1200 cm -1 ) [34]. The shift of the ν(C-O)…”

Section: Terminal Hmentioning

confidence: 97%

“…The Tafel sulfate or bisulfate ions that were adsorbed at the reference potential and desorbed at the sample potentials [33,34]. The bipolar bands at 3700-2500 and 1620 cm -1 are assigned to the OH stretching, ν(OH), and HOH bending, δ(HOH), modes, respectively, of water molecules at the interface [27,35].…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Hydrogen adsorption and hydrogen evolution reaction on a polycrystalline Pt electrode studied by surface-enhanced infrared absorption spectroscopy

Kunimatsu

Senzaki

Samjeské

et al. 2007

Electrochimica Acta

154

146

View full text Add to dashboard Cite

Hydrogen evolution reaction (HER) on a polycrystalline Pt electrode has been investigated in Ar-purged acids by surface-enhanced infrared absorption spectroscopy and electrochemical kinetic analysis (Tafel plot). A vibrational mode characteristic to H atom adsorbed at atop sites (terminal H) was observed at 2080-2095 cm -1 . This band appears at 0.1 V (RHE) and grows at more negative potentials in parallel to the increase in hydrogen evolution current. Good signal-to-noise ratio of the spectra enabled us to establish the quantitative relation between the band intensity (equivalently, coverage) of terminal H and the kinetics of HER, from which we conclude that terminal H atom is the reaction intermediate in HER and the recombination of two terminal H atoms is the rate determining step. The quantitative analysis of the infrared data also revealed that the adsorption of terminal H follows the Frumkin isotherm with repulsive interaction.

show abstract

“…Many surface analytical methods such as radio tracer technique [5], Fourier transform infra-red (FFIR) spectroscopy [6], secondary ion mass spectroscopy (SIMS) [7] and so on, have been used to analyze the metal/electrolyte interracial reactions including the adsorption of the ions on platinum and passivation of iron. Such surface analytical methods afford qualitative analysis of the amount of the species related to the adsorption and passivation, but they place a limitation on quantitative analysis.…”

Section: Introductionmentioning

confidence: 99%

A quartz crystal microbalance study of the electrochemical reaction at the interfaces of Platinum/Aqueous solution and Iron/Aqueous solution

Shin

Pyun

Choi

1997

Metals and Materials

View full text Add to dashboard Cite

The adsorption of the sulphate ions on the platinum electrode in sulphuric acid solution and the breakdown of the passivity in the iron electrode in the chloride-containing and chloride-free alkaline solutions have been investigated by using in-situ electrochemical quartz crystal microbalance (EQCM) technique combined with cyclic voltammetry (CV), potentiodynamic polarization and potentiostatic current transient techniques.In the case of the platinum electrode, the combined electrogravimetric and voltammetric results are indicative of the onset of the adsorption of the sulphate ions at an applied potential between the two characteristic potentials of hydrogen desorption, above which the adsorption occurs. The adsorption of the sulphate ions was quantitatively analyzed with cyclic electrogravimetric data combined with those determined from radio tracer technique and Fourier transform infra-red (FFIR) spectroscopy by other researchers. In the case of the iron electrode, the electrogravimetric data obtained simultaneously with the potentiodynamic polarization data indicate the pitting and high-voltage breakdown of the oxide film in the chloride-containing and -free solutions, respectively. Preventing the crevice corrosion from occurring around the ()-ring at the quartz crystal, the electrogravimetric curve showed that the pit initiation time measured by EQCM coincides with that time determined by current transient experiment.

show abstract

In-situ FT-IR spectroscopic study of bisulfate and sulfate adsorption on platinum electrodes

Cited by 123 publications

References 36 publications

Electrochemical quartz crystal microbalance measurements of CO adsorption and oxidation on Pt in various electrolytes

Electrochemical quartz crystal microbalance measurements of CO adsorption and oxidation on Pt in various electrolytes

Hydrogen adsorption and hydrogen evolution reaction on a polycrystalline Pt electrode studied by surface-enhanced infrared absorption spectroscopy

A quartz crystal microbalance study of the electrochemical reaction at the interfaces of Platinum/Aqueous solution and Iron/Aqueous solution

Contact Info

Product

Resources

About