Electrocatalysis of Direct Methanol Fuel Cells 2009
DOI: 10.1002/9783527627707.ch7
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Methanol‐Tolerant Cathode Catalysts for DMFC

Abstract: In this chapter, we will summarize the kinetic behavior of the oxygen reduction reaction (ORR), mainly on platinum electrodes since this metal is the most active electrocatalyst for the ORR in an acidic medium. The discussion will, however, be restricted to the characteristics of this reaction in direct methanol fuel cells (DMFCs) because the possible presence in the cathode compartment of methanol, which can crossover the proton exchange membrane and react with oxygen. IntroductionThe oxygen electrode has bee… Show more

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Cited by 9 publications
(5 citation statements)
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“…The nano-scale particle size (~2e4 nm) renders them high surface-to-volume ratio which maximizes the surface area availability for electrochemical reactions. In a DMFC, current best choice of catalysts is PtRu with 1:1 atomic ratio for methanol oxidation in the anode and pure Pt for oxygen reduction in the cathode [105,106]. It is observed that these Pt-based catalysts undergo structural changes over the lifetime of the DMFC and result in a loss of electrocatalytic activity.…”
Section: Degradation Of Catalystsmentioning
confidence: 98%
“…The nano-scale particle size (~2e4 nm) renders them high surface-to-volume ratio which maximizes the surface area availability for electrochemical reactions. In a DMFC, current best choice of catalysts is PtRu with 1:1 atomic ratio for methanol oxidation in the anode and pure Pt for oxygen reduction in the cathode [105,106]. It is observed that these Pt-based catalysts undergo structural changes over the lifetime of the DMFC and result in a loss of electrocatalytic activity.…”
Section: Degradation Of Catalystsmentioning
confidence: 98%
“…The development of methanol-tolerant cathode catalysts that are cheaper than Pt for DMFCs has received much attention in the last years [7][8][9][10]. One approach to minimize the cathode polarization due to methanol crossover, which reduces the cell voltage by about 0.1-0.2 V, relies on the use of a catalyst selective to ORR.…”
Section: Introductionmentioning
confidence: 99%
“…The direct methanol fuel cell (DMFC) is recognized as a promising technology for energy supply of portable and stationary applications due to high energy density of methanol, compact design, easy fuel handling and storage. Despite considerable advantages, the DMFC still has drawbacks such as poor activity of Pt for methanol oxidation compared to that for hydrogen oxidation, methanol crossover that results on fuel loss and mixed potential formation at the cathode and low corrosion resistance of the catalyst support [1]. Some Pt-based alloy catalysts such as PtCo, PtCu and PtFe [2] already showed improved methanol tolerance but unfortunately poor longterm stability due to the dissolution of the non-noble metal [3].…”
mentioning
confidence: 99%