Anodic, cathodic and cyclic voltammetric deposition of ruthenium oxides from aqueous RuCl3 solutions

Jow, Jiin-Jiang; Lee, Hung-Jie; Chen, Ho-Rei; Wu, Mao‐Sung; Wei, Tzu‐Chien

doi:10.1016/j.electacta.2006.09.018

Cited by 53 publications

(34 citation statements)

References 28 publications

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“…eV can be associated with the presence of Ru(0) [34]. Besides, the small peak at 284.88 eV can be attributed to C-1s peak from graphite-like carbon atoms [42].…”

mentioning

confidence: 94%

“…For example, the specific capacitance of the composite prepared by potentiostatic deposition (-0.5 V for 60 min, electrode 3) increases 82 % with respect to the bare electrode, while capacitance grows only about 43 % for the composites obtained by potentiodynamic (electrodes 5 and 6) and galvanostatic modes (electrodes 7 to 9). The smaller capacitance value of the composite material prepared by potentiodynamic deposition can be associated with the repetitive rearrangement of the metal oxide deposits during cycling, which produces a less porous film and then reduces the reaction sites [34]. As a result, the penetration of the electrolyte through the metal oxide pores is restricted and the charge-transfer process may occur predominantly at the outermost surface of the electrode.…”

mentioning

confidence: 99%

“…Furthermore, the On the other hand, the use of electrochemical methods for the preparation of composite materials provides a number of advantages over other techniques. For example, the preparation procedure is simple and the growth of the film can be modulated by experimental parameters such as potential or applied current, the composition of the precursor solution and the deposition time [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

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Flexible ruthenium oxide-activated carbon cloth composites prepared by simple electrodeposition methods

Sieben

Morallón

Cazorla‐Amorós

2013

Energy

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This work focuses on the preparation of flexible ruthenium oxide containing activated carbon cloth by electrodeposition. Different electrodeposition methods have been used, including chronoamperometry, chronopotentiometry and cyclic voltammetry. The electrochemical properties of the obtained materials have been measured. The results show that the potentiostatic method allows preparing composites with higher specific capacitance than the pristine activated carbon cloth. The capacitance values measured by cyclic voltammetry at 10 mV s -1 and 1 V of potential window were up to 160 and 180 F g -1 . This means an improvement of 82 % and 100 % with respect to the capacitance of the pristine activated carbon cloth. This excellent capacitance enhancement is attributed to the small particle size (4-5 nm) and the three-dimensional nanoporous network of the ruthenium oxide film which allows reaching very high degree of oxide utilization without blocking the pore structure of the activated carbon cloth. In addition, the electrodes maintain the mechanical properties of the carbon cloth and can be useful for flexible devices.Corresponding Author *E. Morallon, morallon@ua.es, Telf. +34-965909590 2 IntroductionThe rapid population growth, economic expansion and industries development has increased the global energy consumption. Today, fossil fuels (oil, gas and coal) supply around 85 % of the energy market, providing more than 80 % of the carbon dioxide anthropogenic emissions released into the atmosphere each year. As a result, the present energy system could not be able to sustain the global economic growth in a relative short period of time [1]. In this scenario, the government´s efforts are focused on the development of sustainable solutions that include the replacement of fossil fuels by renewable energy sources, efficiency improvements in the energy production and energy savings on the demand side in order to reduce the carbon emission and to mitigate the global warming consequences (i.e., global climate change and level sea rise) [2].However, many of the renewable energy sources are of a fluctuating nature and cannot cover the daily electricity consumption of industries, households/services and transport activities [3]. To solve this limitation, an efficient storage device can be employed in order to cover the power consumption during the low/zero period of energy production or during a peak power demand [4,5].One of the most important challenges facing scientists today is the construction of efficient systems that can store the energy produced by renewable sources and make it available according to the demand. In this respect, supercapacitors have attracted great attention because they can be used for large commercial applications ranging from small electronic devices as cell phones and emergency medical equipment to electric vehicles and photovoltaic cells [6]. For instance, supercapacitors can be used to recuperate the breaking energy in electric buses [7] and electric/fuel cell cars [8] or to storage the exc...

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“…eV can be associated with the presence of Ru(0) [34]. Besides, the small peak at 284.88 eV can be attributed to C-1s peak from graphite-like carbon atoms [42].…”

mentioning

confidence: 94%

mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Flexible ruthenium oxide-activated carbon cloth composites prepared by simple electrodeposition methods

Sieben

Morallón

Cazorla‐Amorós

2013

Energy

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“…The pseudocapacitance is charged by chemisorptions of working cation of the electrolyte at a reduced complex at the surface of the electrode [2]. In recent years, metal oxides such as RuO x [3], NiO [4] and CoO [5] and MnO 2 [6] have been investigated intensively for pseudocapacitor. Among these metal oxides, manganese oxide is the most promising candidate for supercapacitor electrode because of its low cost, favorable pseudocapacitive characteristics and environmentally benign nature [7].…”

Section: Introductionmentioning

confidence: 99%

Influence of surfactant CTAB on the electrochemical performance of manganese dioxide used as supercapacitor electrode material

Zhang

Wang

Liu

et al. 2012

Journal of Alloys and Compounds

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“…Ruthenium based catalysts for industrial use have been exclusively prepared by impregnating method using ruthenium trichloride (RuCl 3 ･ nH 2 O) showing water soluble property 10) . In order to obtain deeply reduced ruthenium species as Ru 0 showing high activity for various reforming reactions and to remove chlorine from the catalyst surface, reduction procedure as activation is desired in most cases before these catalysts are applied to reactions 11) . In the case of small FC system for domestic use, the reforming catalyst is pre-reduced and packed in the reactor.…”

Section: Introductionmentioning

confidence: 99%

An Attempt to Activate Silica Supported Ruthenium Catalyst Abbreviating Reduction Procedure; Evaluation of Oxidation State of Ruthenium Species by Hydrogenation of 1,3-butadiene

Suzuki

Murakami²,

Kimura³

2012

Trans. Mat. Res. Soc. Japan

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Ruthenium based industrial catalysts have been manufactured exclusively using ruthenium chloride as RuCl 3 ･nH 2 O which shows water soluble properties. Activation process, usually hydrogenation, is required to remove chlorine and obtain low oxidation state of ruthenium species which gives excellent activity and selectivity. Recently, for instance, small packaged co-generation system equipped with a PEM-FC (polymer electrode membrane -fuel cell) has been noticeable technology, therefore, the way to obtain instantly active state of catalyst at startup stage in the co-generation system becomes important. In this study, when the precursor of Ru/SiO 2 catalyst obtained by conventional impregnation was soaked in the diluted aqueous ammonia, the hydrogenation of 1,3-butadiene rapidly proceeded on the catalyst abbreviating reduction procedure. The conversion of 1,3-butadiene on the catalyst was closely related to the existence of the deeply reduced ruthenium species on carrier such as silica. Thus the catalyst treated with aqueous ammonia gave ruthenium species with low oxidation state despite having abbreviated reduction procedure.

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Anodic, cathodic and cyclic voltammetric deposition of ruthenium oxides from aqueous RuCl3 solutions

Cited by 53 publications

References 28 publications

Flexible ruthenium oxide-activated carbon cloth composites prepared by simple electrodeposition methods

Flexible ruthenium oxide-activated carbon cloth composites prepared by simple electrodeposition methods

Influence of surfactant CTAB on the electrochemical performance of manganese dioxide used as supercapacitor electrode material

An Attempt to Activate Silica Supported Ruthenium Catalyst Abbreviating Reduction Procedure; Evaluation of Oxidation State of Ruthenium Species by Hydrogenation of 1,3-butadiene

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