Sequential and simultaneous electrodeposition of Pt–Ru electrocatalysts on a HOPG substrate and the electro-oxidation of methanol in aqueous sulfuric acid

Rodriguez-Nieto, F.; Morante-Catacora, Tatiana Y.; Cabrera, Carlos R.

doi:10.1016/j.jelechem.2004.04.008

Cited by 71 publications

(49 citation statements)

References 65 publications

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“…Electrodeposition in an aqueous solution offers an effective way to deposit platinum and other noble metal catalysts selectively at desired locations in the electrode with both ionic and electronic access [6]. Electrodeposition with pulse current [1,5,7], direct current [8], constant potential or consecutive potential steps [9][10][11][12][13][14][15][16][17][18] and cyclic voltammetry [19,20] have been used to deposit platinum and Pt-Ru bimetallic catalysts onto carbon substrates.…”

Section: Introductionmentioning

confidence: 99%

Supported Pt and Pt–Ru catalysts prepared by potentiostatic electrodeposition for methanol electrooxidation

2007

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Methanol electrooxidation was investigated onPt-Ru electrocatalysts supported on glassy carbon. The catalysts were prepared by electrodeposition from solutions containing chloroplatinic acid and ruthenium chloride. Bulk composition analysis of the Pt-Ru catalyst was performed using an X-ray detector for energy dispersive spectroscopy analysis (EDX). Three different compositions were analyzed in the range 0-20 at.% Ru content. Tafel plots for the oxidation of methanol in solutions containing 0.1-2 M CH 3 OH, and in the temperature range 23-50°C showed a reasonably well-defined linear region. The slope of the Tafel plots was found to depend on the ruthenium composition. The lower slope was determined for the Pt catalyst, varying between 100 and 120 mV dec -1 . The values calculated for the alloys were higher, ranging from 120 to 140 mV dec -1 . The reaction order for methanol varies from 0.5 to 0.8, increasing with the ruthenium content. The activation energy calculated from Arrhenius plots was found to change with the catalyst composition, showing a lower value around 30 kJ mol -1 for the alloys, and a higher value, of 58.8 kJ mol -1 , for platinum. The effect of ruthenium content is explained by the bifunctional reaction mechanism.

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Section: Introductionmentioning

confidence: 99%

Supported Pt and Pt–Ru catalysts prepared by potentiostatic electrodeposition for methanol electrooxidation

2007

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“…Wang). [8,9]. The only possible way is to modify the electrode surface in order that, at low potentials, its coverage of oxygenated species (e.g.…”

Section: Introductionmentioning

confidence: 99%

Co-catalytic effect of Ni in the methanol electro-oxidation on Pt–Ru/C catalyst for direct methanol fuel cell

Wang

Yin

Zhang

et al. 2006

Electrochimica Acta

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“…Reaction (3), which produces carbon dioxide, is the only rate determining step with the PtRu catalyst. To increase the catalytic activity of the anode, the introduction of a PtRu binary catalyst was found to be the best electrocatalyst, because of its tolerance to CO, and has been widely used in DMFC for the electrooxidation of methanol [12].…”

Section: Introductionmentioning

confidence: 99%

The effect of PtRuW ternary electrocatalysts on methanol oxidation reaction in direct methanol fuel cells

Kang

Noh

Park

et al. 2010

Korean J. Chem. Eng.

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PtRu and PtRuW ternary electrocatalysts were synthesized using an NaBH 4 reduction method. A uniform distribution of particles, with average particle size of 3-3.5 nm was indentified from X-ray diffraction (XRD) and transmission electron microscopy (TEM). The electrochemically active surface area was slightly decreased after the addition of W into PtRu. When W was added to PtRu, the specific and mass activity of methanol electro-oxidation was increased. The most active catalyst was Pt 5 Ru 4 W, of which specific and mass activities were 265.38 mA/m 2 and 6.21 A/g . catal, respectively. The specific and mass activity was 390 and 320% higher than that of PtRu.

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Sequential and simultaneous electrodeposition of Pt–Ru electrocatalysts on a HOPG substrate and the electro-oxidation of methanol in aqueous sulfuric acid

Cited by 71 publications

References 65 publications

Supported Pt and Pt–Ru catalysts prepared by potentiostatic electrodeposition for methanol electrooxidation

Supported Pt and Pt–Ru catalysts prepared by potentiostatic electrodeposition for methanol electrooxidation

Co-catalytic effect of Ni in the methanol electro-oxidation on Pt–Ru/C catalyst for direct methanol fuel cell

The effect of PtRuW ternary electrocatalysts on methanol oxidation reaction in direct methanol fuel cells

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