ChemInform Abstract: Surface Properties of RuO2‐IrO2 Mixed Oxide Electrodes.

Angelinetta, C.; Atanasoska, Lj.; Atanasoski, Radoslav

doi:10.1002/chin.198709014

Cited by 21 publications

(29 citation statements)

References 1 publication

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“…An one hour final annealing at the same temperature and O 2 flux completed the procedure. This Ti-support pretreatment and the electrode mounting are described elsewhere 15,16 .…”

Section: Methodsmentioning

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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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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“…An one hour final annealing at the same temperature and O 2 flux completed the procedure. This Ti-support pretreatment and the electrode mounting are described elsewhere 15,16 .…”

Section: Methodsmentioning

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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“…5). A result of the high Ir x Ru 1−x O 2 dispersion is that the variation in charge with composition is much less than observed at DSA type layers [34,39,41]. This indicates that a wider composition range can be used without significant loss of electrochemically active surface area if Ir x Ru 1−x O 2 is well dispersed.…”

Section: Chemical State Of the Surface Antimony Speciesmentioning

confidence: 97%

“…3) Charge measurements (integration of the anodic sweep of the voltammogram) are often used in DSA literature to compare the electrochemically active surface area of noble metal oxide electrodes [37,38]. Typically the charge of Ir x Ru 1−x O 2 electrodes show a strong dependence on composition [34,39,41]. Here we have used the approach described by others to evaluate the outer and total charge of the materials [40].…”

Section: Chemical State Of the Surface Antimony Speciesmentioning

confidence: 99%

Electrocatalytic activity of IrO2–RuO2 supported on Sb-doped SnO2 nanoparticles

Marshall

Haverkamp

2010

Electrochimica Acta

180

129

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Electrocatalytic IrO 2 -RuO 2 supported on Sb-doped SnO 2 (ATO) nanoparticles is very active towards the oxygen evolution reaction. The IrO 2 -RuO 2 material is XRD amorphous and exists as clusters on the surface of the ATO.Systematic changes to the surface chemical composition of the ATO as a function of the IrO 2 :RuO 2 ratio suggests an interaction between the IrO 2 -RuO 2 and ATO. Cyclic voltammetry indicates that the electrochemically active surface area of IrO 2 -RuO 2 clusters is maximised when the composition is 75 mol% IrO 2 -25 mol% RuO 2 . Decreasing the loading of IrO 2 -RuO 2 on ATO reduces the electrochemically active surface area, although there is evidence to support a decrease in the clusters size with decreased loading. Tafel slope analysis shows that if the clusters are too small, the kinetics of the oxygen evolution reaction are reduced. Overall, clusters of IrO 2 -RuO 2 on ATO have similar or better performance for the oxygen evolution reaction than many previously reported materials, despite the low quantity of noble metals used in the electrocatalysts. This suggests that these oxides may be of economic

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“…The Ti/Nb 2 O 5 -Pt electrodes were initially characterized by cyclic voltammetry at 50 mV s -1 , in a 1 mol L -1 HClO 4 acid solution, between 0.4 and 1.4V, as usually done for many oxide systems, particularly for those of DSA Ò type [39]. As shown in Figure 4, the voltammetric curves change significantly during continuous cycling.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Preparation and electrochemical characterization of Pt nanoparticles dispersed on niobium oxide

et al. 2003

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Electrodes consisting of Pt nanoparticles dispersed on thin films of niobium oxide were prepared onto titanium substrates by a sol-gel method. The physical characterization of these electrodes was carried out by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray analysis. The mean size of the Pt particles was found to be 10.7 nm. The general aspects of the electrochemical behavior were studied by cyclic voltammetry in 1 mol L -1 HClO 4 aqueous solution. The response of these electrodes in relation to the oxidation of formaldehyde and methanol in acidic media was also studied.

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ChemInform Abstract: Surface Properties of RuO2‐IrO2 Mixed Oxide Electrodes.

Abstract: The results of cyclic voltammetry, AES and XPS indicate that surface composition and morphology of RuO2‐IrO2 mixed oxides are strongly dependent on the preparation procedure.

Cited by 21 publications

References 1 publication

The oxidation of formaldehyde on high overvoltage DSA type electrodes

The oxidation of formaldehyde on high overvoltage DSA type electrodes

Electrocatalytic activity of IrO2–RuO2 supported on Sb-doped SnO2 nanoparticles

Preparation and electrochemical characterization of Pt nanoparticles dispersed on niobium oxide

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