Methanol oxidation on carbon-supported PtSn electrodes in silicotungstic acid

Aricò, A.S.; Kim, H.; Shukla, A.K.; Ravikumar, M. K.; Antonucci, V.; Giordano, N.

doi:10.1016/0013-4686(94)80012-x

Cited by 49 publications

(21 citation statements)

References 37 publications

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“…A parallel strategy to the development of a new electrocatalyst for methanol electro-oxidation would be to employ cocatalysts or catalytic enhancers; accordingly, heteropolyacids have been demonstrated to be potential candidates for this approach [63,89]. In the last few years, research on heteropolyacids has been a topic of remarkable and widespread technological interest.…”

Section: Heteropolyacids As Surface Promotersmentioning

confidence: 99%

“…The source of this interest mainly lies upon their unique structural and chemical characteristics, as well as on their capacity to exert various catalytic functions. In a previous study by our group, it was shown that the electro-oxidation of methanol is promoted by silicotungstic acid [89]. More recently, other authors have shown that the promoting behavior of H 4 SiW 12 O 40 for methanol electro-oxidation is still present even when the heteropolyacid is dissolved in small volume of sulfuric acid [90].…”

Section: Heteropolyacids As Surface Promotersmentioning

confidence: 99%

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DMFCs: From Fundamental Aspects to Technology Development

Aricò¹,

Srinivasan

Antonucci³

2001

Fuel Cells

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1,452

884

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This review paper describes recent developments in both the fundamental and technological aspects of direct methanol fuel cells (DMFCs). Most previous studies in this field have dealt with fundamental aspects, whereas in recent years, the technology of these devices has become the object of significant interest. This is mainly due to the fact that a probable application of DMFCs in portable power sources and in hybrid electrical vehicles has only recently been envisaged. The section on fundamentals is particularly focused on the electrocatalysis of the methanol oxidation reaction and oxygen electroreduction. In this regard, particular relevance is given to the interpretation of the promoting effect on Pt of additional elements and some aspects of the electrocatalysis of oxygen reduction in the presence of methanol crossover have been treated. The technology section deals with the development of both components and devices. Particular emphasis is given to the development of high surface area electrocatalysts and alternative electrolyte membranes to Nafion, also the fabrication methodologies for the M&E assembly have been discussed. The last part of the paper describes the recent efforts in developing DMFC stacks for both portable and electro‐traction applications. The current status of the technology in this field is presented and some important technical and economical challenges are been discussed.

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Section: Heteropolyacids As Surface Promotersmentioning

confidence: 99%

Section: Heteropolyacids As Surface Promotersmentioning

confidence: 99%

DMFCs: From Fundamental Aspects to Technology Development

Aricò¹,

Srinivasan

Antonucci³

2001

Fuel Cells

Self Cite

1,452

884

View full text Add to dashboard Cite

show abstract

“…The following reaction scheme has been envisaged for methanol oxidation on Pt-Sn alloy catalyst [35,36]. From the foregoing, one can conclude that the addition of Ru and Sn to Pt markedly promotes the electrocatalytic activity of Pt through the adsorption of oxygenated species on Ru or Sn sites.…”

Section: Selective Catalysts For Anodic Oxidation Of Methanolmentioning

confidence: 98%

“…It also appears that certain amorphous metal alloys, such as NiZr, which form a thick passive oxyhydroxide film, could also facilitate methanol oxidation. Among the various methanol oxidation catalysts described above, perhaps Pt-Ru and Pt-Sn are the most widely studied catalysts [29,35,36]. It has been shown that the alloying of Sn and Ru with Pt gives rise to electrocatalysts, which strongly promote the oxidation of methanol and related methanolic species.…”

Section: Selective Catalysts For Anodic Oxidation Of Methanolmentioning

confidence: 99%

“…In order to prepare Pt-Sn alloy catalyst [35,36], a required amount of Vulcan XC-72R carbon is suspended in deionized water and agitated in an ultrasonic bath with constant stirring at 80 C. Appropriate volumes of the solutions of chloroplatinic acid in water and tin chloride in dilute HCl are slowly added to the carbon suspension, under constant stirring, with the temperature maintained at about 80 C. The resulting mass is left for 1.0 h, with constant stirring, to achieve complete impregnation of carbon with chloroplatinic acid and tin chloride solutions. This is followed by drop-wise addition of 0.2 M hydrazine solution, which is slightly higher than the stoichiometric amount required for complete reduction to Pt and Sn metals.…”

Section: Selective Catalysts For Anodic Oxidation Of Methanolmentioning

confidence: 99%

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Advances in Mixed‐Reactant Fuel Cells

2005

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The mixed‐reactant fuel cell (MRFC) is a new concept, in which a mixture of aqueous fuel and gaseous oxygen (or air) flows directly through a porous anode‐electrolyte‐cathode structure or through a strip‐cell with an anode‐electrolyte‐cathode configuration. These structures can be single cells or parallel stacks of cells and may be in a planar, tubular or any other geometry. Selectivity in the electrocatalysts for MRFCs is mandatory to minimize mixed‐potential at the electrodes, which otherwise would reduce the available cell voltage and compromise the fuel efficiency. MRFC offers a cost effective solution in fuel cell design, since there is no need for gas‐tight structure within the stack and, as a consequence, considerable reduction in sealing, manifolding and reactants delivery structure is possible. In recent years, significant advances have been made in MRFCs, using methanol as a fuel. This paper reviews the status of mixed reactant fuel cells and reports some recent experimental data for methanol fuel cell systems.

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Electrochemistry in Direct Methanol Fuel Cells

Bhunia¹,

Dutta²

2021

Encyclopedia of Electrochemistry

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Direct methanol fuel cells (DMFCs) are being considered as one of the highly valued renewable energy sources, as evident from enormous work being carried out on the development of these devices over the past three decades. DMFCs are devices that directly transform the stored chemical energy of methanol into usable electrical energy. For this purpose, the fuel methanol gets oxidized at the anode of a DMFC, and oxygen gets reduced at the cathode in the presence of suitable electrocatalysts. Both the electrooxidation and electroreduction processes require involvement of protons and electrons. These electrode reactions, along with the transport of protons through the membrane electrolyte separator, are the backbone of DMFC operation, and the efficiencies of these phenomena are critical in the ultimate performance of the DMFC device. Keeping this in mind, this article has been completely dedicated to discussion and analysis of in‐depth fundamental electrochemistry involved within the membrane electrode assembly of DMFCs. In this regard, the involved electrochemical reactions in both acidic and alkaline media have been systematically described, with precise emphasis on the methanol oxidation reaction and the oxygen reduction reaction. In addition, the membrane characteristics and the mixed potential arising due to methanol crossover through the membrane have also been explained. Finally, the fundamental electrochemical aspects of DMFCs have been discussed systematically for easy understanding of the readers.

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Methanol oxidation on carbon-supported PtSn electrodes in silicotungstic acid

Cited by 49 publications

References 37 publications

DMFCs: From Fundamental Aspects to Technology Development

DMFCs: From Fundamental Aspects to Technology Development

Advances in Mixed‐Reactant Fuel Cells

Electrochemistry in Direct Methanol Fuel Cells

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