A study of bisulfate adsorption on Pt(111) single crystal electrodes using in situ Fourier transform infrared spectroscopy

Faguy, Peter W.; Marković, Nenad M.; Adžić, Radoslav R.; Fierro, C.; Yeager, Ernest

doi:10.1016/0022-0728(90)87220-e

Cited by 190 publications

(137 citation statements)

References 24 publications

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“…The structure of the partially annealed surface was then analyzed quantitatively using LEED spot-profile analysis (SPA) [17]. A second method was to use a series of step-terrace structures, of the type [m(lll)x(lll)] used previously by Clavilier et.…”

Section: • 0 Introdoctionmentioning

confidence: 99%

The role of defects in the specific adsorption of anions on Pt(111)

Ross

1991

J. Chim. Phys.

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Section: • 0 Introdoctionmentioning

confidence: 99%

The role of defects in the specific adsorption of anions on Pt(111)

Ross

1991

J. Chim. Phys.

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“…These bands are at approximately the same positions of those observed for pH 3. As already observed for adsorbed sulfate on Pt(111) [6][7][8][9] and Au(111), 3,13 the vibrational feature of sulfate adsorbed on Rh(111) is independent of the presence of sulfate or bisulfate in solution. Very likely, adsorbed bisulfate species from very acid solutions undergoes complete dissociation when adsorbed on these surfaces.…”

Section: Effect Of Solution Aciditymentioning

confidence: 52%

“…With this strong limitation imposed by the surface selection rule, it is practically impossible, from the spectroscopic data alone, to deduce the adsorption geometry for the adsorbed sulfate species. In previous publications, it has been assumed that sulfate ions (or bisulfate ions) are coordinated to the Pt(111) surface by three oxygen atoms (three-fold coordination) 6,8 , since this surface matches well such a geometry for the adsorbed sulfate. Comparison with the adsorption of sulfate on Pt(100) suggested that this assumption was quite reasonable.…”

Section: Discussionmentioning

confidence: 99%

“…The common characteristic for adsorbed sulfate on Pt(111) [6][7][8][9] and Au(111) 3,13 is that the spectroscopic features do not depend on the solution pH, i.e. it is insensitive to the presence of bisulfate or sulfate in solution.…”

Section: Introductionmentioning

confidence: 99%

“…Vibrational studies of sulfate adsorbed on single crystal metal electrodes are reported for Pt(111) [6][7][8][9] , Pt(100) 10,11 , Pt(110) 12 , Au(111) 3,13 , Au(100) and (110) 14 and Rh(111) 15,16 . Single crystal surfaces constitute interesting model systems for the study of adsorbed sulfate, especially using in situ FTIR, since it permits to establish some correlation between the surface crystallography and the observed vibrational features.…”

Section: Introductionmentioning

confidence: 99%

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On the adsorption of sulfate on low Miller index Rh(hkl) electrodes: an in situ vibrational analysis

Moraes¹,

Nart²

2001

J. Braz. Chem. Soc.

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A adsorção de íon sulfato em eletrodos de Rh(111), Rh(100) e Rh(110) foi estudada utilizandose a técnica de espectroscopia de FTIR por reflectância in situ. Foi observada somente uma banda vibracional localizada acima de 1200 cm -1 para as três superfícies com baixo índice de Miller e uma banda fraca em 960 cm -1 para o sulfato adsorvido em Rh(111). A banda forte acima de 1200 cm -1 é dependente do potencial com uma variação de 50 cm -1 V -1 . Não foram observadas diferenças espectrais ao se variar a acidez da solução de forma a gerar soluções contendo sulfato ou sulfato ácido. Este resultado é interpretado em termos de uma dissociação completa dos íons, produzindo somente SO 4 2-adsorvido. A orientação da superfície afeta somente a quantidade de espécies sulfato adsorvidas. Parece que o mesmo tipo de adsorbato é encontrado em Rh(111), Rh(110) e Rh(100).The adsorption of sulfate ion on Rh(111), Rh(100) and Rh(110) electrodes was studied using in situ FTIR reflection spectroscopy. For wavenumbers above 1200 cm -1 , only one strong vibrational band is observed for adsorbed sulfate on the three low index rhodium surfaces. A weak band at 960 cm -1 is also observed for Rh(111). The strong band above 1200 cm -1 is potential dependent with a tuning rate of 50 cm -1 V -1 . No differences were observed upon changing the solution acidity in order to provide sulfate or bisulfate in solution. This result is interpreted in terms of complete dissociation of the ions, giving only adsorbed SO 4 2-. The surface orientation affects only the amount of the adsorbed sulfate species. It seems that the same adsorbed sulfate is present on Rh(111), Rh(110) and Rh(100).

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Electrocatalysis – Heterogeneous

Horányi

2002

Encyclopedia of Catalysis

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The present article surveys the state of the art of electrocatalysis, laying stress on the present knowledge and understanding. The links between electrocatalysis and catalysis are analyzed, demonstrating the similarity of catalytic and electrocatalytic systems. Electrochemical methods for the characterization and preparation of catalysts are discussed. Results concerning electrochemical activation of catalysis are presented. Fundamental aspects of electrocatalysis are approached in terms of electrochemistry, analyzing the role of the nature and surface structure of the electrode/catalyst in electrocatalytic processes. Electrocatalytic hydrogenation/reduction processes are discussed in detail, with special attention to the reductive splitting of CO and COH bonds. Studies devoted to the electrocatalytic reduction of carbon dioxide are also considered with respect to the great practical importance of the transformation of CO 2 into useful organic materials and fuels. Results connected with the reductive dehalogenation of various halogenated derivatives are also presented as these compounds are among the most widespread pollutants of the environment. Importance of attempts devoted to the electrocatalytic reduction of anions, first of all to the reduction of nitrate, motivated by their relevance to pollution control is emphasized. Problems of electrocatalytic oxidation of small organic molecules (formic acid, formaldehyde, and methanol) are discussed in detail, considering the potential use of these molecules as fuels in direct fuel cells. Special attention is paid to the electrocatalytic oxidation of diols and polyols.

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A study of bisulfate adsorption on Pt(111) single crystal electrodes using in situ Fourier transform infrared spectroscopy

Cited by 190 publications

References 24 publications

The role of defects in the specific adsorption of anions on Pt(111)

The role of defects in the specific adsorption of anions on Pt(111)

On the adsorption of sulfate on low Miller index Rh(hkl) electrodes: an in situ vibrational analysis

Electrocatalysis – Heterogeneous

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