Assessment of methanol electro-oxidation for direct methanol-air fuel cells

Fritts, S. D.; Sen, Raja

doi:10.2172/7129968

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…There is a limited volume of work on methanol electrooxidation that has addressed these problems by the use of carbonate electrolytes [6][7][8][9]. Of particular interest is the work of Cairns and Bartosik [6], who investigated the direct oxidation of methanol using concentrated cesium and rubidium carbonate electrolytes .…”

Section: Methanol Fuel Cellsmentioning

confidence: 99%

“…Adsorbed radicals OHads are formed in acid solutions [2][3][4][5][6][7][8][9][10][11][12][13] and in alkaline solutions [2][3][4][5][6][7][8][9][10][11][12][13][14] The methanol oxidation reaction, as described above, requires the concurrent adsorption of methanol and oxygen-containing species (i.e., H20 or OR-radicals). High initial currents are observed at potentials cathodic of 400 mV, but drop off rapidly (on the order·ofmilliseconds) by four to five ordersof-magnitude as reported by McNicol et al [28,29].…”

Section: Gas Diffusion Electrodesmentioning

confidence: 99%

See 1 more Smart Citation

Direct Anodic Oxidation of Methanol on Supported Platinum/Ruthenium Catalyst in Aqueous Cesium Carbonate

Rauhe¹,

McLarnon²,

Cairns³

1995

J. Electrochem. Soc.

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Methanol electro-oxidation was carried out on porous gas diffusion electrodes in Cs2CO~ electrolytes at 100 to 140~ and ambient pressures. It was found that Pt-Ru bimetallic catalysts supported on graphitized carbon provided enhanced performance, compared to supported Pt catalyst. Performance curves, based on unit catalyst mass, for Pt-Ru at 120~ matched or exceeded previously reported performance data for supported Pt or Pt black in concentrated Cs2CO3 electrolytes at 120 to 150~ at 8 arm, and for supported Pt-Ru in concentrated H3PO4 electrolytes at 200~ It was found that the polytetrafluoroethylene (PTFE) content in the reaction layer, and consequently the extent of wetting, had a marked effect on cell performance, and 20 to 30 weight percent PTFE was found to be optimal. Maximum cell performance was found at operating temperatures 10 to 15~ below the boiling pint of the electrolyte.

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Section: Methanol Fuel Cellsmentioning

confidence: 99%

Section: Gas Diffusion Electrodesmentioning

confidence: 99%

Direct Anodic Oxidation of Methanol on Supported Platinum/Ruthenium Catalyst in Aqueous Cesium Carbonate

Rauhe¹,

McLarnon²,

Cairns³

1995

J. Electrochem. Soc.

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“…Direct oxidation methanol fuel cells are attractive for several defense and transportation applications in view of their lower weight and volume compared with indirect fuel cells [1,2]. The weight and volume advantages of direct oxidation fuel cells are due to the fact that they do not require any fuel processing equipment.…”

Section: Introductionmentioning

confidence: 99%

Advances in direct oxidation methanol fuel cells

Surampudi

Narayanan

Vamos

et al. 2003

World Scientific Series in 20th Century Chemistry

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Fuel cells that can operate directly on fuels such as methanol are attractive for low to medium power applications in view of their low weight and volume relative to other power sources. A liquid feed direct methanol fuel cell has been developed based on a protonexchange membrane electrolyte and Pt/Ru and Pt-catalyzed fuel and air/02 electrodes, respectively. The cell has been shown to deliver significant power outputs at temperatures of 60 to 90 °C. The cell voltage is near 0.5 V at 300 mA/cm2 current density and an operating temperature of 90 °C. A deterrent to performance appears to be methanol crossover through the membrane to the oxygen electrode. Further improvements in performance appear possible by minimizing the methanol crossover rate. Assessment of catalysts for the oxidation of methanolAnodic oxidation behavior of methanol was investigated in half-cells using both supported and unsupported catalysts at a loading of 0.5 mg/cm2. In these experiments Elsevier Sequoia SSDI 0378-7753(93)01780-L Across Conventional Lines Downloaded from www.worldscientific.com by PURDUE UNIVERSITY on 04/12/15. For personal use only.

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“…Direct oxidation methanol fuel cells (DMFC) are attractive for several defense and transportation applications in view of their lower weight and volume compared to indirect fuel cells [1,2]. The weight and volume advantages of direct oxidation fuel cells are due to the fact that they do not require any fuel processing equipment.…”

Section: Introductionmentioning

confidence: 99%