Investigation of reactant transport within a polymer electrolyte fuel cell using localised CO stripping voltammetry and adsorption transients

Brett, Dan J. L.; Atkins, Stephen; Brandon, Nigel P.; Vesovic, Velisa; Vasileiadis, Nikos; Kucernak, Anthony

doi:10.1016/j.jpowsour.2004.02.007

Cited by 32 publications

(13 citation statements)

References 20 publications

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“…The dispersion of CO is a result of these two mechanisms. 91 The results obtained in this study helped to develop a model able to predict the effects of transient poisoning, which are present, in particular, during the system start-up, in the distribution of the CO adsorption. A good agreement with the experimental results was observed.…”

Section: Distribution In a Single Channelmentioning

confidence: 89%

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Carbon monoxide poisoning and mitigation strategies for polymer electrolyte membrane fuel cells – A review

Valdés-López

Mason

Shearing

et al. 2020

Progress in Energy and Combustion Science

133

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Polymer electrolyte membrane fuel cells (PEMFC) have received much attention due to their high power density, good start-stop capabilities and high gravimetric and volumetric power density compared with other fuel cells. However, certain technological challenges persist, which include the fact that conventional anode electrocatalysts are poisoned by low levels (few ppm) of carbon monoxide (CO). This review considers the mechanism of CO poisoning and the effects that it has on the PEMFC performance. The key parameters affecting CO poisoning are identified and methods used to mitigate the effects are discussed. These mitigation strategies are divided into three groups according to the means by which the technologies are applied: pre-treatment of reformate, on board removal of CO and in operando mitigation strategies.

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Section: Distribution In a Single Channelmentioning

confidence: 89%

“…The distribution 'pattern' of CO poisoning across the extent of the anode was studied by Brett et al (2004). Localised CO stripping and adsorption transients were used to determine the distribution of CO to either side of a single linear flow channel (Figure 7).…”

Section: Distribution In a Single Channelmentioning

confidence: 99%

Carbon monoxide poisoning and mitigation strategies for polymer electrolyte membrane fuel cells – A review

Valdés-López

Mason

Shearing

et al. 2020

Progress in Energy and Combustion Science

133

View full text Add to dashboard Cite

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“…Charge corresponding to the current peak is 10 mC for 1.4 cm 2 (geometric) electrode. Theoretically, CO oxidation charge is 420 lC for 1 cm 2 area of electrochemically active Pt [46]. Thus 10 mC corresponds to 23.94 cm 2 of Pt.…”

Section: ð1þmentioning

confidence: 96%

Electrooxidation of formic acid at platinum nanoclusters electrodeposited on PEDOT coated carbon paper electrode

2011

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Nanoclusters of Pt were electrochemically deposited on a conducting polymer, namely, poly(3,4-ethylenedioxythiophene) (PEDOT), which was also electrochemically deposited on carbon paper current collector. PEDOT facilitated uniform distribution of Pt nanoclusters, when compared with Pt electrodeposition on bare carbon paper substrate. Spectroscopy data indicated absence of any interaction between PEDOT and Pt. The electrochemically active surface area as measured from carbon monoxide adsorption followed by its oxidation was several times greater for Pt-PEDOT/C electrode in comparison with Pt/C electrode. The catalytic activity of Pt-PEDOT/C electrode for electrooxidation of formic acid was significantly greater than that of Pt/C electrode. Amperometry data suggested that the electrodes were stable for continuous oxidation of HCOOH.

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“…and Hg [51] upd and oxidation of adsorbed CO layer [52] have been used to measure real surface area of some metal electrodes. The simple principle behind the surface area measurement is that adlayer oxidation/deposition charge is proportional to the area.…”

Section: Electroactive Surface Area Measurementmentioning

confidence: 99%

Electrochemistry of metal adlayers on metal chalcogenides

Рагойша

Aniskevich

Bakavets

et al. 2020

J Solid State Electrochem

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Electrodeposition of metal adlayers on semiconductor metal chalcogenides (CdSe, CdS, PbTe, PbSe, PbS, Bi 2 Te 3 ) is reviewed. Cathodic underpotential deposition of metal adlayer on metal chalcogenide is the electrochemically irreversible surface limited reaction. The irreversibility of the upd increases in the row from tellurides to selenides and further to sulfides. The underpotential shift on chalcogenide nanoparticles increases with particle size. Metal upd on chalcogenides is applied as a means of measurement of electroactive surface area of chalcogenide electrodes. The method is especially advantageous for multicomponent systems with other component not supporting upd, such as CdSe-TiO 2 , CdSe-ZnO. Differences of voltammetric profiles of Pb upd on Bi 2 Te 3 and Te are applied for detection of Bi 2 Te 3 surface contamination by elemental tellurium. The further tasks in the electrochemistry of metal adlayers are their incorporation as interlayers in layered chalcogenides and electrodeposition of superlattices.

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Investigation of reactant transport within a polymer electrolyte fuel cell using localised CO stripping voltammetry and adsorption transients

Cited by 32 publications

References 20 publications

Carbon monoxide poisoning and mitigation strategies for polymer electrolyte membrane fuel cells – A review

Carbon monoxide poisoning and mitigation strategies for polymer electrolyte membrane fuel cells – A review

Electrooxidation of formic acid at platinum nanoclusters electrodeposited on PEDOT coated carbon paper electrode

Electrochemistry of metal adlayers on metal chalcogenides

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