Aspects of the anodic oxidation of methanol

Burstein, G.T.; Barnett, Clive; Kucernak, Anthony; Williams, Keith R.

doi:10.1016/s0920-5861(97)00107-7

Cited by 228 publications

(124 citation statements)

References 37 publications

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“…Other investigations [17,18] used a Pt based catalyst for alcohols electro-oxidation and produced a Pt catalyst as nanomaterials with higher surface area for high catalytic performance and utilization efficiency [19,20] or used Pt alloys [21]. Although Pt has been recognized as the most active electrocatalyst for alcohols oxidation [1,[22][23][24], but there is a drawback in that; Pt is easily poisoned by the reaction intermediate [22]. Addition of foreign metals such as Sn to the noble metals [17,[25][26][27] often enhances their electrocataytic activity, where Pt promotes dehydrogenation and a second metal *Address correspondence to this author at the Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt; Tel: +(202)35676563; Fax: (+202)5727556, (+202)5728843; E-mail: Hanaa20055@hotmail.com addition provides oxygen at lower potentials to complete fuel oxidation to CO 2 [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Electro-Oxidation of Ethanol and Propanol at Pt and Ti Modified Nanoparticle Substrates for Direct Alcohol Fuel Cells (DAFCs)

Hassan¹

2009

TOELECJ

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Modified Pt and Ti substrates were prepared by electrodeposition of nanocrystallite Pt and Pt x -Sn y catalysts for electro-oxidation of ethanol, 1-propanol and 2-propanol. The chemical composition, the phase structure and the surface morphology of the Pt and Pt x -Sn y electrodeposits were studied by X-ray diffractometer (XRD), energy dispersive X-ray spectroscopy (EDX) and scanning electron microscope (SEM). Their electro-catalytic activities were studied in 0.5 M H 2 SO 4 by cyclic votlammetry and chronoamperometric techniques. It was found that, the nature of the substrate significantly affects the performance of the prepared catalyst towards electro-oxidation of different alcohols. Accordingly, the modified Pt substrates display enhanced catalytic activity and a higher stability towards alcohols electro-oxidation compared to the modified Ti substrates. Steady state Tafel plots experiments showed smoother and higher rate of alcohols oxidation on the modified Pt substrates than that on the modified Ti. High anodic Tafel slopes >200 for 1-propanol and 2-propanol electro-oxidation were obtained on Ti modified substrates indicating the complexity of the oxidation reaction on such electrodes.

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Section: Introductionmentioning

confidence: 99%

Electro-Oxidation of Ethanol and Propanol at Pt and Ti Modified Nanoparticle Substrates for Direct Alcohol Fuel Cells (DAFCs)

Hassan¹

2009

TOELECJ

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“…The proton transfer through the membrane is associated with the transport of water molecules through the membrane. Methanol can also be transported by an electro-osmotic drag (methanol crossover), which is due to selected physical properties of methanol such as its dipole moment, which consequently leads to a decrease in cell performance [3,4]. To improve the performance of a DMFC, it is necessary to reduce the loss of fuel across the cell [5].I t also requires highly proton conductive polymer membranes in order to obtain a high voltage per current density in the unit cell.…”

Section: Introductionmentioning

confidence: 99%

Preparation of ion exchange membranes for fuel cell based on crosslinked poly(vinyl alcohol) with poly(styrene sulfonic acid-co-maleic acid)

Kim

Guiver

Nam

et al. 2006

Journal of Membrane Science

120

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“…The electrocatalytic activity is strongly dependent on particle size, dispersibility, support materials, and surface conditions [5]. In addition, it is necessary to decrease the amount of precious metal used and the loading level on the support materials.…”

Section: Resultsmentioning

confidence: 99%

Methanol oxidation behaviors of PtRu nanoparticles deposited onto binary carbon supports for direct methanol fuel cells

Park

Park²,

Lee³

2013

Carbon letters

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In this study, PtRu nanoparticles deposited on binary carbon supports were developed for use in direct methanol fuel cells using carbon blacks (CBs) and multi-walled carbon nanotubes (MWCNTs). The particle sizes and morphological structures of the catalysts were analyzed using X-ray diffraction and transmission electron microscopy, and the PtRu loading content was determined using an inductively coupled plasma-mass spectrometer. The electrocatalytic characteristics for methanol oxidation were evaluated by means of cyclic voltammetry with 1 M CH 3 OH in a 0.5 M H 2 SO 4 solution as the electrolyte. The PtRu particle sizes and the loading level were found to be dependent on the mixing ratio of the two carbon materials. The electroactivity of the catalysts increased with an increasing MWCNT content, reaching a maximum at 30% MWCNTs, and subsequently decreased. This was attributed to the introduction of MWCNTs as a secondary support, which provided a highly accessible surface area and caused morphological changes in the carbon supports. Consequently, the PtRu nanoparticles deposited on the binary support exhibited better performance than those deposited on the single support, and the best performance was obtained when the mass ratio of CBs to MWCNTs was 70:30.

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Aspects of the anodic oxidation of methanol

Cited by 228 publications

References 37 publications

Electro-Oxidation of Ethanol and Propanol at Pt and Ti Modified Nanoparticle Substrates for Direct Alcohol Fuel Cells (DAFCs)

Electro-Oxidation of Ethanol and Propanol at Pt and Ti Modified Nanoparticle Substrates for Direct Alcohol Fuel Cells (DAFCs)

Preparation of ion exchange membranes for fuel cell based on crosslinked poly(vinyl alcohol) with poly(styrene sulfonic acid-co-maleic acid)

Methanol oxidation behaviors of PtRu nanoparticles deposited onto binary carbon supports for direct methanol fuel cells

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