Characterization of RuO<sub>2</sub>-based film electrodes by secondary ion mass spectrometry

Daolio, S.; Facchin, B.; Pagura, C.; Battisti, A. De; Barbieri, Andrea; Kristóf, János

doi:10.1039/jm9940401255

Cited by 13 publications

(8 citation statements)

References 24 publications

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“…In a more general frame, coatings based on different types of binary oxide mixtures exhibit maxima in effective surface area and in cation uptake properties, for low-intermediate noble-metal concentrations, in agreement with Fig. 2 [37][38][39]. On the other hand, considering other details of Fig.…”

Section: Discussion Of Results and Conclusionsupporting

confidence: 73%

“…The same situation also exists at the other investigated coating compositions. Taking into consideration the non-linear nature of the change in the acid-base properties of oxides, while changing oxide coating composition [10,13,[37][38][39], and the absence of simple additivity in the adsorption properties of RuO 2 -TiO 2 electrodes [25], we think that an exhaustive analysis of the experimental data shown in Fig. 2 may be difficult.…”

Section: Discussion Of Results and Conclusionmentioning

confidence: 99%

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Adsorption of thallium cations on RuO2–TiO2 electrodes

et al. 2007

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The electrochemical ion-exchange properties of RuO 2 -TiO 2 film electrodes with different composition have been studied in acidic and alkaline media. Thalliumcation uptake has been observed only from the latter and its extent was found to be a function of electrode potential and composition. At potentials near 0.0 V (RHE), the amount of adsorbed Tl + exhibited a maximum, and decreased with increasing potential, reaching a broad minimum in the range 0.4-0.8 V. A further increase in the electrode potential, above about 1.0 V, led to an increase of adsorbed thallium species, essentially due to deposition of a few layers of Tl(III) hydroxide. In fact, the release of the latter species was found to be much slower than that of thallium ions adsorbed at 0.0 V. For the latter, in turn, the double injection/ejection mechanism, currently accepted to explain the charge-storage in oxide electrodes, seems to be confirmed. The high C values attained at 0.0 V indicate that the large ionic radius of Tl + does not prevent its diffusion through the thinner pore texture of the oxide coatings, possibly because of its poor hydration, related with lower charge density at the ion surfaces.

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Section: Discussion Of Results and Conclusionsupporting

confidence: 73%

Section: Discussion Of Results and Conclusionmentioning

confidence: 99%

Adsorption of thallium cations on RuO2–TiO2 electrodes

et al. 2007

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“…8,10 In recent years secondary ion mass spectrometry (SIMS) has proved to be a powerful characterization tool. [11][12][13][14] In fact, such investigations have provided information on the material components, their distribution and reactivity. In this technique, the sample is bombarded with e.g.…”

mentioning

confidence: 99%

“…Due to the non-equilibrium character of microstructural features, e.g. cell-volume swelling, 4 RuO 2 / TiO 2 solid solution range, 5, components distribution [6][7][8] and segregation phenomena, [9][10][11] synthetic conditions strongly affect the physicochemical characteristics of the films. [12][13][14] This can explain the low reproducibility of results, and the poor relationship between preparation, microstructure and surface texture and the electrocatalytic performance of these materials.…”

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confidence: 99%

Surface chemistry of RuO2/IrO2/TiO2 mixed-oxide electrodes: secondary ion mass spectrometric study of the changes induced by electrochemical treatment

Barison

Battisti

Fabrizio

et al. 2000

Rapid Commun. Mass Spectrom.

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The IrO2/RuO2/TiO2 ternary system is well known for its electrocatalytic activity towards oxygen‐ and chlorine‐evolution reactions. Electrochemical processing induces noticeable chemical and morphological modifications on these electrodes, depending on the noble metal oxide content. In this work, cathodic/anodic polarization and the oxygen‐evolution reaction were studied in order to evaluate the electrocatalytic activity at various noble metal oxide percentages. The best performing electrode (30 mol% noble metal oxides) was analyzed before and after electrochemical tests by means of secondary ion mass spectrometry (SIMS) in order to determine the chemical composition modification which occurred on the surface and in deeper regions of the mixed‐oxide film. Copyright © 2000 John Wiley & Sons, Ltd.

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“…Release of gas products due to precursor pyrolysis, incorporation of chemical impurities, and segregation of components to the outermost part of the electrode film seem to enhance the porosity of the mixed-oxide films and therefore, their apparent catalytic activity. − …”

Section: Introductionmentioning

confidence: 99%

Investigations on the Formation of RuO₂/ZrO₂-Based Electrocatalytic Thin Films by Surface Analysis Techniques

et al. 1999

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Secondary ion mass spectrometry (SIMS) was used to follow the evolution of RuO2/ZrO2 film electrodes. The coating mixtures with compositions 20% Ru + 80% Zr and 50% Ru + 50% Zr prepared on titanium supports from isopropanolic solutions of RuCl3 × 3H2O and ZrOCl2 × 8H2O precursors were heated to 200, 300, and 500 °C and analyzed by SIMS. Cl--concentration depth profiles as ion intensity versus sputtering time curves showed the hydrolytic conversion of the ZrOCl2 precursor in the outer part of the film at low temperature and noble metal content and a rather uniform distribution at elevated temperatures. Zr+/Ru+ ion intensity ratios showed the relative enrichment of ruthenium in the near surface region at 500 °C, while slight accumulation of zirconia at the surface was evidenced for both compositions in harmony with the results of emission FTIR measurements. No reaction between the oxide components or between coatings and support was identified in the systems investigated.

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Characterization of RuO₂-based film electrodes by secondary ion mass spectrometry

Cited by 13 publications

References 24 publications

Adsorption of thallium cations on RuO2–TiO2 electrodes

Adsorption of thallium cations on RuO2–TiO2 electrodes

Surface chemistry of RuO2/IrO2/TiO2 mixed-oxide electrodes: secondary ion mass spectrometric study of the changes induced by electrochemical treatment

Investigations on the Formation of RuO₂/ZrO₂-Based Electrocatalytic Thin Films by Surface Analysis Techniques

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Characterization of RuO2-based film electrodes by secondary ion mass spectrometry

Cited by 13 publications

References 24 publications

Adsorption of thallium cations on RuO2–TiO2 electrodes

Adsorption of thallium cations on RuO2–TiO2 electrodes

Surface chemistry of RuO2/IrO2/TiO2 mixed-oxide electrodes: secondary ion mass spectrometric study of the changes induced by electrochemical treatment

Investigations on the Formation of RuO2/ZrO2-Based Electrocatalytic Thin Films by Surface Analysis Techniques

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Characterization of RuO₂-based film electrodes by secondary ion mass spectrometry

Investigations on the Formation of RuO₂/ZrO₂-Based Electrocatalytic Thin Films by Surface Analysis Techniques