Investigation of RuO2/Ta2O5 thin film evolution by thermogravimetry combined with mass spectrometry

Kristóf, János; Szilagyi, Tamas; Horváth, Erzsébet; Frost, Raymond

doi:10.1016/j.tsf.2005.03.037

Cited by 12 publications

(5 citation statements)

References 21 publications

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“…This suggests the formation of an amorphous phase. This result is expected based on thermogravimetric data showing that the tantalum oxide formation occurs at temperatures higher than 450°C [27] and complete Ta 2 O 5 crystallization occurs at temperatures around 700°C [3,27]. A similar result was observed for RuO 2 -Ta 2 O 5 films prepared by SD [4].…”

Section: Resultssupporting

confidence: 83%

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: 83%

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

2008

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“…The evolution of twocomponent systems like RuO 2 -TiO 2 , RuO 2 -ZrO 2 and RuO 2 -Ta 2 O 5 film electrodes from isopropanolic solutions have been studied by thermoanalytical, mass spectrometric and infrared emission spectroscopic methods [14][15][16]. As to the formation of the tin oxide thin film and the IrO 2 -SnO 2 two-component system, thermogravimetric, mass spectrometric and infrared spectroscopic studies have been reported [17,18]. In almost all the previous works the precursors were dissolved in alcoholic solutions.…”

Section: Introductionmentioning

confidence: 99%

Investigation of RuO2–SnO2 thin film formation by thermogravimetry–mass spectrometry and infrared emission spectroscopy

et al. 2006

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“…As discussed above, the hydroxyl content of hydrous ruthenium oxide is critical to its pseudocapacitive behavior. We have determined the hydroxyl content of our materials using a combination of thermogravimetric analyses (TGA, see the Supporting Information) − , infrared spectroscopy (IR), and solid-state proton ( 1 H) magic angle spinning (MAS) NMR spectroscopy. There have been a limited number of solid state NMR studies of hydrous RuO x − .…”

Section: Resultsmentioning

confidence: 99%

Nanostructured Ruthenium Oxide Electrodes via High-Temperature Molecular Templating for Use in Electrochemical Capacitors

Brumbach

Alam

Kotula

et al. 2010

ACS Appl. Mater. Interfaces

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Ruthenium oxide is a model pseudocapacitive materials exhibiting good electronic and protonic conduction and has been shown to achieve very high gravimetric capacitances. However, the capacitance of thermally prepared ruthenium oxide is generally low because of low protonic conductivity resulting from dehydration of the oxide upon annealing. High-temperature processing, however also produces the electrically conducting ruthenium oxide rutile phase, which is of great interest for electrochemical capacitors. Here, unusual electrochemical characteristics were obtained for thermally prepared ruthenium oxide when fabricated in the presence of alkyl-thiols at high temperature. The performance characteristics have been attributed to enhanced multifunctional properties of the material resulting from the novel processing. The processing method relies on a simple, solution-based strategy that utilizes a sacrificial organic template to sterically direct hierarchical architecture formation in electro-active ruthenium oxide. Thin films of the templated RuO(2) exhibit energy storage characteristics comparable to hydrous ruthenium oxide materials formed under dramatically different conditions. Extensive materials characterization has revealed that these property enhancements are associated with the retention of molecular-sized metal oxide clusters, high hydroxyl concentrations, and formation of hierarchical porosity in the ruthenium oxide thin films.

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Investigation of RuO2/Ta2O5 thin film evolution by thermogravimetry combined with mass spectrometry

Abstract: The thermal evolution process of RuO 2 -Ta 2 O 5 /Ti coatings with varying noble metal content has been investigated under in situ conditions by thermogravimetry combined with

Cited by 12 publications

References 21 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

Investigation of RuO2–SnO2 thin film formation by thermogravimetry–mass spectrometry and infrared emission spectroscopy

Nanostructured Ruthenium Oxide Electrodes via High-Temperature Molecular Templating for Use in Electrochemical Capacitors

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