An in-situ STM study of anion adsorption on Pt(111) from sulfuric acid solutions

Funtikov, A.M.; Linke, U.; Stimming, Ulrich; Vogel, R.

doi:10.1016/0039-6028(94)00774-8

Cited by 180 publications

(144 citation statements)

References 15 publications

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“…Shyngaya et al 15 structure, similar to that found for Au(111) 3 and Pt(111) 5 . It is noteworthy that the surface coverage of 0.2 suggested by this structure is the same for Au(111), Pt(111) and Rh(111) and it is in good agreement with other techniques, such as radiotracer assay 15 .…”

Section: Introductionsupporting

confidence: 69%

See 1 more Smart Citation

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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Section: Introductionsupporting

confidence: 69%

“…The adsorption of sulfate and other oxyanions experimented a renewed interest with the introduction of auxiliary techniques in electrochemistry, such as in situ FTIR spectroscopy 1 , radioactive labeling 2 and in situ scanning tunneling microscopy (STM) [3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

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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“…0.45 V is compared for the different temperatures. This spike marks the position of the disorder-order transition of the sulfate layer [30], and this transition, which takes place at a constant coverage [31], moves towards positive potentials. This fact clearly indicates that the adsorption of anions is disfavored as the temperature increases.…”

Section: Temperature Effects On the Behavior Of The Electrodes In Thementioning

confidence: 99%

On the activation energy of the formic acid oxidation reaction on platinum electrodes

Perales-Rondón

Herrero

Feliu

2015

Journal of Electroanalytical Chemistry

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Abstract.A temperature dependent study on the formic acid oxidation reaction has been carried out in order to determine the activation energy of this reaction on different platinum single crystal electrodes, namely Pt(100), Pt(111), Pt(554) and Pt (544) (100) electrode, and the activation values for this process range between 20 and 100 kJ/mol. These results have been explained using a reaction mechanism in which the oxidation of formic acid requires the presence of a pre-adsorbed anion on the electrode surface.

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“…78,79 In such configuration, both the STM substrate and tip are fully controlled by the electrochemical potential versus a common reference electrode. Using in situ STM, reconstruction of metallic electrode surfaces at the solid/liquid interfaces under electrochemical potential control, 80 metal deposition, [81][82][83] anion adsorption 25,84,85 and organic molecule adsorption 82 have been characterized at atomic or/and molecular level. In situ STM has even been employed for nanofabrication of metallic nanoclusters or pits with precise positioning and designed patterns on the well defined surfaces.…”

Section: In Situ Scanning Tunnelling Microscopymentioning

confidence: 99%

Electrochemically controlled self-assembled monolayers characterized with molecular and sub-molecular resolution

Zhang

Welinder

Chi

et al. 2011

Phys. Chem. Chem. Phys.

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Self-assembled organization of functional molecules on solid surfaces has developed into a powerful and sophisticated tool for surface chemistry and nanotechnology. A number of reviews on the topic have been available since the mid 1990s. This perspective article aims to focus on recent development in the investigations of electronic structures and assembling dynamics of electrochemically controlled self-assembled monolayers (SAMs) of thiol containing molecules on gold surfaces. A brief introduction is first given and particularly illustrated by a Table summarizing the molecules studied, the surface lattice structures and the experimental operating conditions. This is followed by discussion of two major high-resolution experimental methods, scanning tunnelling microscopy (STM) and single-crystal electrochemistry. In Section 3, we briefly address choice of supporting electrolytes and substrate surfaces, and their effects on the SAM structures. Section 4 constitutes the major body of the article by offering some details of recent studies for the selected cases, including in situ monitoring of assembling dynamics, molecular electronic structures, and the key external factors determining the SAM packing. In Section 5, we give examples of what can be offered by theoretical computations for the detailed understanding of the SAM electronic structures revealed by STM images. A brief summary of the current applications of SAMs in wiring metalloproteins, design and fabrication of sensors, and single-molecule electronics is described in Section 6. In the final two sections (7 and 8), we discuss the current status in understanding of electronic structures and properties of SAMs in electrochemical environments and what could be expected for future perspectives.

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An in-situ STM study of anion adsorption on Pt(111) from sulfuric acid solutions

Cited by 180 publications

References 15 publications

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

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

On the activation energy of the formic acid oxidation reaction on platinum electrodes

Electrochemically controlled self-assembled monolayers characterized with molecular and sub-molecular resolution

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