Morphology, Microstructure, and Electrocatalytic Properties of RuO2 ‐ SnO2 Thin Films

Nanni, Luca; Polizzi, Stefano; Benedetti, Alvise; Battisti, Achille De

doi:10.1149/1.1391590

Cited by 64 publications

(51 citation statements)

References 29 publications

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“…3. It can be seen that for Ru-rich samples (C50 at.%) in powder form the values for crystal parameter, a, are in agreement with the literature [24,25]. On the other hand, higher dispersion is observed for Ta-rich compositions (Ru B 40 at.%).…”

Section: Resultssupporting

confidence: 87%

“…For the c parameter, a shift from the literature values is observed [24]. Similar behavior has been seen with other oxides, which is believed to be related to the non-equilibrium state obtained by the preparation method [25]. For thin films, the c-values are close to literature values [24] and the highest discrepancy was observed for 50 at.% Ru loading, as noted previously [4].…”

Section: Resultssupporting

confidence: 85%

“…Deconvolution of the peaks in the XRD of the RuO 2 -Ta 2 O 5 oxide mixture ( Fig. 1) was performed as described elsewhere [4,25]. Two saturated solid solutions of RuO 2 and Ta 2 O 5 were formed between 10 and 90 at.% Ru loadings.…”

Section: Resultsmentioning

confidence: 99%

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Morphological and electrochemical investigation of RuO2–Ta2O5 oxide films prepared by the Pechini–Adams method

2008

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Preparation methods can profoundly affect the structural and electrochemical properties of electrocatalytic coatings. In this investigation, RuO 2 -Ta 2 O 5 thin films containing between 10 and 90 at.% Ru were prepared by the Pechini-Adams method. These coatings were electrochemically and physically characterized by cyclic voltammetry, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The composition and morphology of the oxide were investigated before and after accelerated life tests (ALT) by EDX and SEM. SEM results indicate typical mud-flat-cracking morphology for the majority of the films. High resolution SEMs reveal that pure oxide phases exhibit nanoporosity while binary compositions display a very compact structure. EDX analyses reveal considerable amounts of Ru in the coating even after total deactivation. XRD indicated a rutile-type structure for RuO 2 and orthorhombic structure for Ta 2 O 5 . XPS data demonstrate that the binding energy of Ta is affected by Ru addition in the thin films, but the binding energy of Ru is not likewise influenced by Ta. The stability of the electrodes was evaluated by ALT performed at 750 mA cm -2 in 80°C 0.5 mol dm -3 H 2 SO 4 . The performance of electrodes prepared by the Pechini-Adams method is 100% better than that of electrodes prepared by standard thermal decomposition.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 85%

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Morphological and electrochemical investigation of RuO2–Ta2O5 oxide films prepared by the Pechini–Adams method

2008

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“…Oxides such as RuO 2 and IrO 2 are usually mixed with other oxides to stabilize the coatings. Along with the conducting oxides, non-conducting oxides such as TiO 2 and SnO 2 [4][5][6][7][8] etc. are mixed with electrocatalytic oxides.…”

Section: Introductionmentioning

confidence: 99%

Wet film application techniques and their effects on the stability of RuO2–TiO2 coated titanium anodes

Shrivastava

Moats

2008

J Appl Electrochem

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The effect of wet film application techniques on the physical and electrochemical properties and operational stability of RuO 2 -TiO 2 coated titanium anodes was evaluated. Four compositions of RuO 2 -TiO 2 coatings were applied to Ti substrates by three different wet coating methods-brush, dip and spin. Changing the coating technique resulted in different morphologies. Electrochemically active surface area of the coatings was related to the morphology. A shift in Ru(III)/Ru(IV) oxidation potential occurred upon changing the application technique. For lower ruthenium content coatings, this shift was related to coating lifetime. Anode stability in accelerated lifetesting showed that dip coated samples lasted up to three times longer than brush coated samples for lower ruthenium content.

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“…Nota-se um pico largo e bem definido, situado em aproximadamente 0,5 -1,0 V vs. ERH. Vários trabalhos na literatura, utilizando RuO 2 como material eletroativo, mostram um pico largo situado na mesma região, o qual é atribuído à transição redox do estado sólido Ru(III)/Ru(IV) [7,50,73]. O aumento do conteúdo de RuO 2 no recobrimento levou a uma melhor definição das transições redox e o eletrodo com conteúdo de 30% mol de RuO 2 mostrou um pico mais estreito e definido.…”

Section: Registros Dos Voltamogramas Cíclicos (Vc)unclassified

Estudo da substituição de TiO2 por Ta2O5 em eletrodos binários de óxido de rutênio: preparação, caracterização eletroquímica e investigação estrutural e morfológica.

Ribeiro¹

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Morphology, Microstructure, and Electrocatalytic Properties of RuO2 ‐ SnO2 Thin Films

Cited by 64 publications

References 29 publications

Morphological and electrochemical investigation of RuO2–Ta2O5 oxide films prepared by the Pechini–Adams method

Morphological and electrochemical investigation of RuO2–Ta2O5 oxide films prepared by the Pechini–Adams method

Wet film application techniques and their effects on the stability of RuO2–TiO2 coated titanium anodes

Estudo da substituição de TiO2 por Ta2O5 em eletrodos binários de óxido de rutênio: preparação, caracterização eletroquímica e investigação estrutural e morfológica.

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