Nano-stuctured Pt–Fe/C as cathode catalyst in direct methanol fuel cell

Li, Wenzhen; Zhou, Weijiang; Li, Huanqiao; Zhou, Zhenhua; Zhou, Bing; Sun, Gongquan; Xin, Qin

doi:10.1016/j.electacta.2003.10.015

Cited by 307 publications

(158 citation statements)

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“…There is still much research being undertaken to maximise DMFC performance by optimising the structure and loading (especially lowering) of platinum-based electrocatalysts [26]. There is also some research into alternative methanol-resistant cathode catalysts, an 6 example of which is carbon supported Pt-Fe alloys [27,28]. However, the authors of this review (along with others [29,30]) firmly believe that for more substantial increases in DMFC performances, a more radical approach is required.…”

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confidence: 98%

Prospects for Alkaline Anion‐Exchange Membranes in Low Temperature Fuel Cells

Varcoe¹,

2005

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This article introduces the radical approach of applying alkaline anion-exchange membranes (AAEMs) to meet the current challenges with regards to direct methanol fuel cells (DMFCs).A review of the literature is presented with regards to the testing of fuel cells with alkaline membranes (fuelled with hydrogen or methanol) and also to candidate alkaline anionexchange membranes for such an application. A brief review of the directly related patent literature is also included. Current and future research challenges are identified along with potential strategies to overcome them. Finally, the advantages and challenges with the direct electrochemical oxidation of alternative fuels are discussed, along with how the application of alkaline membranes in such fuel cells may assist in improving performance and fuel efficiency. KeywordsLow temperature, Alkaline anion-exchange membrane, Direct methanol fuel cell, Polymer electrolyte fuel cell.

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confidence: 98%

Prospects for Alkaline Anion‐Exchange Membranes in Low Temperature Fuel Cells

Varcoe¹,

2005

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“…The electrochemically active surface area (EAS) was determined by assuming that a monolayer of adsorbed hydrogen requires 210 μC/cm 2 for its oxidation [12]. The EAS was then calculated using the following equation [13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and electrochemical analysis of Pt-loaded, polypyrrole-decorated, graphene-composite electrodes

Park¹,

Kim²

2013

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In this study, an electro-catalyst of Pt nanoparticles supported by polypyrrole-functionalized graphene (Pt/PPy-reduced graphene oxide [RGO]) is reported. The Pt nanoparticles are deposited on the PPy-RGO composite by chemical reduction of H2PtCl6 using NaBH4. The presence of graphene (RGO) caused higher activity. This might have been due to increased electro-chemically accessible surface areas, increased electronic conductivity, and easier charge-transfer at polymer-electrolyte interfaces, allowing higher dispersion and utilization of the deposited Pt nano-particles. Microstructure, morphology and crystallinity of the synthesized materials were investigated using X-ray diffraction and transmission electron microscopy. The results showed successful deposition of Pt nano-particles, with crystallite size of about 2.7 nm, on the PPy-RGO support film. Catalytic activity for methanol electrooxidation in fuel cells was investigated using cyclic voltammetry. The fundamental electrochemical test results indicated that the electro-catalytic activity, for methanol oxidation, of the Pt/PPy-RGO combination was much better than for commercial catalyst.

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“…Pt alloying for methanol oxidation intends to the establishment of a bi-functional catalytic system that must be capable of both chemisorbing methanol on Pt sites and promoting oxidation of the chemisorbed CO fragment by the secondary metal addition. These studies of Pt alloyed with other noble metals have shown that Ru has by far the largest promoting effect and the bi-functional mechanism of oxidation in PtRu catalysts has been a subject of detailed experimental investigation over the last 20 years [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%