Studies on methanol fuel cell

Verma, Lata

doi:10.1016/s0378-7753(99)00403-6

Cited by 36 publications

(18 citation statements)

References 3 publications

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“…The generation of H + ions in the anodic reaction is an obvious reason for the favored kinetics in alkaline solution. The electrocatalysts used in the alkaline fuel cell are Pt, Ni [24,25], Fe(III) [26], Al [26], and Pt-Ru [27]. The application of alkaline electrolytes to the DMFC could lead to a reduction in catalyst loading and allow the use of less expensive nonprecious metal catalysts.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Pt-Pd/C Electrocatalyst for Methanol Oxidation in Alkaline Medium

Mahapatra

Datta

2011

International Journal of Electrochemistry

104

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The Pt-Pd/C electrocatalyst was synthesized on graphite substrate by the electrochemical codeposition technique. The physicochemical characterization of the catalyst was done by SEM, XRD, and EDX. The electrochemical characterization of the Pt-Pd/C catalyst for methanol electro-oxidation was studied over a range of NaOH and methanol concentrations using cyclic voltammetry, quasisteady-state polarization, chronoamperometry, and electrochemical impedance spectroscopy. The activity of methanol oxidation increased with pH due to better OH species coverage on the electrode surface. At methanol concentration (>1.0 M), there is no change in the oxidation peak current density because of excess methanol at the electrode surface and/or depletion of OH − at the electrode surface. The Pt-Pd/C catalyst shows good stability and the low value of Tafel slope and charge transfer resistance. The enhanced electrocatalytic activity of the electrodes is ascribed to the synergistic effect of higher electrochemical surface area, preferred OH − adsorption, and ad-atom contribution on the alloyed surface.

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Section: Introductionmentioning

confidence: 99%

Characterization of Pt-Pd/C Electrocatalyst for Methanol Oxidation in Alkaline Medium

Mahapatra

Datta

2011

International Journal of Electrochemistry

104

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“…The direct methanol fuel cell (DMFC) is considered as one of the most suitable and promising options [1-3], since it can be operated at a low working temperature, and has high energy conversion efficiency [4]. Meanwhile, methanol is relatively cheap, can be easily stored and handled [5]. However, low performance and high cost are the two major drawbacks which hinder the commercialization of DMFCs.…”

Section: Introductionmentioning

confidence: 99%

Study of pyrolyzed hemin/C as non-platinum cathodic catalyst for direct methanol fuel cells

et al. 2010

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Biological reduction of O-2 to H2O justifies a serious look at heme as a potential O-2 reduction reaction (ORR) catalyst for low temperature fuel cells. In this study, a novel non-platinum electrocatalyst for ORR was prepared through hemin, which is hydrochloride of heme, supported on Black Pearls 2000 carbon black (Hm-BP) pyrolyzed at 700-900 A degrees C in Ar atmosphere. The physical and electrocatalytic properties of as-prepared catalysts were characterized by TGA, XRD, XPS, TEM, rotating disk electrode (RDE) and rotating ring disk electrode (RRDE). It has found that the catalyst treated at 750 A degrees C (Hm-BP-750) exhibits the best property among the Hm-BP catalysts prepared. The onset potential of ORR on the Hm-BP-750 at 30 A degrees C was measured ca. 0.90 V (vs. RHE) in 0.1 M H2SO4, and mass current density was reached 15.3 mA mg(-1) at 0.75 V. It has revealed that O-2 could be reduced directly to water in a 4e process between 0.9 and 0.83V, and the yield of H2O2 was 0-18% in the potential range of 0.83-0.63 V. This methanol-tolerant catalyst also presents excellent stability in medium-term test of direct methanol fuel cell at 80 A degrees C.National Natural Science Foundation of China [20933004, 20833005, 20921120405

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“…Methanol oxidation AFCs have been investigated by Verma et al using metal ion impregnated electrodes [101]. With Ag þ impregnated cathodes and Al(III) and Fe (III) treated anodes, modest current densities (maximum 54 mA cm À2 with Al) were achieved with a 6 M KOH electrolyte.…”

Section: Aqueous Electrolyte Mediamentioning

confidence: 99%

Electrocatalysis in the Direct Methanol Alkaline Fuel Cell

Scott

2009

Electrocatalysis of Direct Methanol Fuel Cells

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Studies on methanol fuel cell

Cited by 36 publications

References 3 publications

Characterization of Pt-Pd/C Electrocatalyst for Methanol Oxidation in Alkaline Medium

Characterization of Pt-Pd/C Electrocatalyst for Methanol Oxidation in Alkaline Medium

Study of pyrolyzed hemin/C as non-platinum cathodic catalyst for direct methanol fuel cells

Electrocatalysis in the Direct Methanol Alkaline Fuel Cell

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