Ruthenium Palladium Oxide-Coated Titanium Anodes for Low-Current-Density Oxygen Evolution

Shrivastava, Prachi; Moats, Michael S.

doi:10.1149/1.2917206

Cited by 13 publications

(6 citation statements)

References 35 publications

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“…Furthermore, to enhance the stability of RuO 2 under OER conditions, coupling RuO 2 with several inert or stable oxide components also tends to be an appealing strategy. ,− For instance, Scott’s group found that Nb 2 O 5 addition stabilized the RuO 2 during the oxygen-evoluting process . Also, insertion of Mn x O y enables the considerable enhancement of both OER activity and stability of RuO 2 , which may be the result of disrupted RuO 2 crystallinity, a modification in the electronic state of Mn, and cracked morphology .…”

Section: Recent Advances In Ru-based Electrocatalysts Toward Water Sp...mentioning

confidence: 99%

Recent Advances and Prospective in Ruthenium-Based Materials for Electrochemical Water Splitting

et al. 2019

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As a highly appealing technology for hydrogen generation, water electrolysis including oxygen evolution reaction (OER) at the anode and hydrogen evolution reaction (HER) at the cathode largely depends on the availability of efficient electrocatalysts. Accordingly, over the past years, much effort has been made to develop various electrocatalysts with superior performance and reduced cost. Among them, ruthenium (Ru)-based materials for OER and HER are very promising because of their prominent catalytic activity, pH-universal application, the cheapest price among the precious metal family, and so on. Herein, recent advances in this hot research field are comprehensively reviewed. A general description about water splitting is presented to understand the reaction mechanism and proposed scaling relations toward activities, and key stability issues for Ru-based materials are further given. Subsequently, various Ru-involving electrocatalysts are introduced and classified into different groups for improving or optimizing electrocatalytic properties, with a special focus on several significant bifunctional electrocatalysts along with a simulated water electrolyzer. Finally, a perspective on the existing challenges and future progress of Ru-based catalysts toward OER and HER is provided. The main aim here is to shed some light on the design and construction of emerging catalysts for energy storage and conversion technologies.

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Section: Recent Advances In Ru-based Electrocatalysts Toward Water Sp...mentioning

confidence: 99%

Recent Advances and Prospective in Ruthenium-Based Materials for Electrochemical Water Splitting

et al. 2019

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“…Therefore, the sample polarization, and consequently their Tafel slope, was amplified. 64,65 This increase in the Tafel slope was more significant in higher fractions of MnO 2 particles in the sample, which is due to higher density of micro-cracks and micro-pores in the samples containing more MnO 2 , which was shown in Figures 4 and 5. Partial evolution of O 3 from the MnO 2 surface may be another reason for the change in Tafel slope of the sample at very high potential.…”

Section: Resultsmentioning

confidence: 79%

Electrochemical Reactions on Metal-Matrix Composite Anodes for Metal Electrowinning

Mohammadi

Alfantazi

2013

J. Electrochem. Soc.

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In this study, Pb-MnO 2 composite anodes were developed through single-action powder pressing. The effect of MnO 2 content of the composite anodes on the physical and electrochemical properties of the samples were investigated and compared with those of the pure pressed Pb and a commercial Pb-Sn-Ca electrowinning anode. Surface morphology of the fabricated samples was examined using scanning electron microscopy (SEM). Cyclic voltammetry and potentiodynamic polarization experiments were performed in 180 g/l sulphuric acid solution at 37 ± 0.5 • C to study the surface reactions of the anodes and their performance in terms of oxygen evolution reaction (OER) rate and potential. The results indicated that the addition of MnO 2 improved the electrocatalytic activity of the lead anode for oxygen evolution. Oxidation of lead was also influenced by MnO 2 particles. The effects of manganese ions in the electrolyte on the electrochemical performance of the composite anodes were also studied. Results showed that manganese ions, depending on concentration, can have both promoting and suppressive effects on the OER on the composite anodes.

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“…In another paper from our group [43], it is clearly indicated that life of the anode can be significantly improved by the presence of a thin oxide layer. It is believed that a semiconducting oxide, TiO x, is formed, which improves the stability of the coating, as opposed to an insulating oxide.…”

Section: Stabilitymentioning

confidence: 95%

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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Ruthenium Palladium Oxide-Coated Titanium Anodes for Low-Current-Density Oxygen Evolution

Cited by 13 publications

References 35 publications

Recent Advances and Prospective in Ruthenium-Based Materials for Electrochemical Water Splitting

Recent Advances and Prospective in Ruthenium-Based Materials for Electrochemical Water Splitting

Electrochemical Reactions on Metal-Matrix Composite Anodes for Metal Electrowinning

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

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