Characterization of DSA type electrodes prepared by rapid thermal decomposition of the metal precursor

Fóti, György; Mousty, Christine; Reid, V. W.; Comninellis, Ch.

doi:10.1016/s0013-4686(98)00240-0

Cited by 36 publications

(18 citation statements)

References 8 publications

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“…Figure 2 presents the voltammograms of the three different electrodes in a 0.5mol L -1 H 2 SO 4 solution in the absence and in the presence of 100 mmol L -1 of formaldehyde cover-ing mainly the double layer potential region. The behaviour observed is typical of thermally prepared oxide layer electrodes [2][3][4][5][6] with the surface oxidation potential range presenting a displacement to more positive values when in the presence of the organic substance. The broadness of the peaks can be understood in terms of a large heterogeneity in the surface sites, as proposed by Trasatti and Kurzweil 17 .…”

Section: Methodsmentioning

confidence: 71%

“…These electrodes were generally based on RuO 2 / TiO 2 mixtures deposited on a metallic substrate (usually titanium). Later, modified DSA type electrodes incorporating iridium oxides were investigated for the oxygen evolution reaction 2,3 and also with other metals [4][5][6] , in order to modulate their properties and to increase their service life. More recently, DSA type electrodes have been used for the oxidation of some organic molecules that constitute water pollutants, notable phenols 7 , as well as for the electrolysis of sea water 8,9 .…”

Section: Introductionmentioning

confidence: 99%

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The oxidation of formaldehyde on high overvoltage DSA type electrodes

Motheo¹,

González²,

Tremiliosi‐Filho³

et al. 2000

J. Braz. Chem. Soc.

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Neste trabalho a oxidação eletroquímica do formaldeído é estudada sobre eletrodos dimensionalmente estáveis preparados por decomposição térmica de percursores (correspondentes cloretos The electrolyses were performed galvanostatically in a filter press cell with 0.5 mol L -1 H 2 SO 4 solutions with initial formaldehyde concentration equal to 100 mmol L -1 . The concentration of formaldehyde decreases fast with the electrolysis time, with the ternary anode (Ir + Ru + Ti) presenting the best performance for this step. The anode containing only Ir, despite presenting the higher superficial charge, is the one with the lowest electrocatalytic activity. For the formic acid oxidation step, the presence of iridium in the anode composition does not promote the process, the anode containing only ruthenium being the most effective for this step.

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Section: Methodsmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

The oxidation of formaldehyde on high overvoltage DSA type electrodes

Motheo¹,

González²,

Tremiliosi‐Filho³

et al. 2000

J. Braz. Chem. Soc.

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“…Titanium substrates were attached to a titanium rod by spot welding for dip coating. The substrate was then fully immersed into the precursor Application Pulsed laser deposition [14] Sputtering [15] Metal organic CVD [16][17][18] RF magnetron sputtering [19] Sol-gel [9,[20][21][22] Electrodeposition [23][24][25] Spray pyrolysis [26] Rapid thermal decomposition [27] Adams fusion method [28] Precursor solution Polyol method [28] Pechini method-Polymeric precursor [11,12,29] solution and withdrawn at a constant rate of 0.18 m min -1 . Spin coated samples were prepared by using a Laurells WS-400A-6NPP/LITE single wafer spin coater.…”

Section: Wet Film Applicationmentioning

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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“…However, mechanical resistance and adherence problems between the Ti and the PbO 2 coating were observed, and the introduction of metallic transition layers was required to overcome such interfacial difficulties [29,35,44,45]. Thus, a particular type of anodic material called "modified titanium electrodes" has been developed; among these stand Ti/TiO 2 /PbO 2 as dimensionally stable anodes (DSAs) [46][47][48][49]. The use of TiO 2 as a transition layer improves the corrosion resistance of Ti but not so the conductivity and other intermixed properties related to the PbO 2 deposit.…”

Section: Introductionmentioning

confidence: 99%