Evidence for high performances of low Pt loading electrodes based on capped platinum electrocatalyst and carbon nanotubes in fuel cell devices

Pérez, H.; Morin, Arnaud; Akrour, Laurent; Cremona, C.; Baret, B.; Haccoun, J.; Escribano, Sylvie; Etchéberry, Arnaud

doi:10.1016/j.electacta.2009.11.090

Cited by 11 publications

(3 citation statements)

References 21 publications

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“…When they compared the performance of the cell with different PTFE loading of Toray carbon paper (10,20, and 30% PTFE), the paper with the medium PTFE content (e.g. 20%) showed the best performance.…”

Section: Floodingmentioning

confidence: 99%

“…The primary focus is to minimise the loading of Platinum (Pt) in the catalyst of the Membrane Electrode Assembly (MEA) which is considered to be the main contributor to the high cost [2]. Some studies have suggested the use of more effective techniques for Pt deposition onto the catalyst to reduce its loading [3][4][5][6][7], others concentrated on enhancing the polarisation performance of the cell to compensate for further Pt reduction [8][9][10]. Although some studies [11] claimed that reduction of up to 50% (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Degradation aspects of water formation and transport in Proton Exchange Membrane Fuel Cell: A review

Ous

Arcoumanis

2013

Journal of Power Sources

131

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent repository link AbstractThis review paper summarises the key aspects of Proton Exchange Membrane Fuel Cell (PEMFC) degradation that are associated with water formation, retention, accumulation, and transport mechanisms within the cell. Issues related to loss of active surface area of the catalyst, ionomer dissolution, membrane swelling, ice formation, corrosion, and contamination are also addressed and discussed. The impact of each of these water mechanisms on cell performance and durability was found to be different and to vary according to the design of the cell and its operating conditions. For example, the presence of liquid water within Membrane Electrode Assembly (MEA), as a result of water accumulation, can be detrimental if the operating temperature of the cell drops to sub-freezing.The volume expansion of liquid water due to ice formation can damage the morphology of different parts of the cell and may shorten its life-time. This can be more serious, for example, during the water transport mechanism where migration of Pt particles from the catalyst may take place after detachment from the carbon support. Furthermore, the effect of transport mechanism could be augmented if humid reactant gases containing impurities poison the membrane, leading to the same outcome as water retention or accumulation.Overall, the impact of water mechanisms can be classified as aging or catastrophic. Aging has a longterm impact over the duration of the PEMFC life-time whereas in the catastrophic mechanism the impact is immediate. The conversion of cell residual water into ice at sub-freezing temperatures by the water retention/ accumulation mechanism and the access of poisoning contaminants through the water transport mechanism are considered to fall into the catastrophic category. The effect of water mechanisms on PEMFC degradation can be reduced or even eliminated by (a) using advanced materials for improving the electrical, chemical and mechanical stability of the cell components against deterioration, and (b) implementing effective strategies for water management in the cell.

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Section: Floodingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Degradation aspects of water formation and transport in Proton Exchange Membrane Fuel Cell: A review

Ous

Arcoumanis

2013

Journal of Power Sources

131

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“…To decrease fuel cell cost and to reduce or eliminate the Pt loading, a highly active and cost-effective catalysts are needed in the near future. To enhance the oxygen reduction activity and reduce the amount of Pt content in electrodes of fuel cells, significant research has been focused on Ptbased alloy catalysts [4][5][6], non-precious metal catalysts [7][8][9], metal-free carbon-based catalysts [10][11][12][13]. Among these, gold (Au) catalysts have been observed to exhibit moderate activity in alkaline solutions [14][15] [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and electrocatalytic activity towards oxygen reduction reaction of gold-nanostars

et al. 2018

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The oxygen reduction reaction (ORR) is a characteristic reaction which determines the performance of fuel cells which convert a chemical energy into an electrical energy. Aims of this study are to synthesize Au-based nanostars (AuNSs) and determine their preliminary electro-catalytic activities towards ORR by a rotating-disk electrode method in alkaline electrolyte. The images obtained from a scanning electron microscope (SEM) and a transmission electron microscope (TEM) analyses confirm the formation of the star-shaped nanoparticles. Among the investigated nanostar catalysts, an AuNS5 with smaller size and a few branches showed the higher electrocatalytic activity towards ORR than other catalysts with a bigger size. In addition, the electron numbers transferred for all the catalysts are approximately two. The present study results infer that the size of the Au-based nanostars may influence greatly on their catalytic activity. The present study results show that the further improvement is needed for Au-based nanostar catalysts towards the ORR reaction. Keywords: fuel cell, oxygen reduction reaction, gold nanostars

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Low and non-platinum electrocatalysts for PEMFCs: Current status, challenges and prospects

Brouzgou

Song

Tsiakaras

2012

Applied Catalysis B: Environmental

358

194

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Evidence for high performances of low Pt loading electrodes based on capped platinum electrocatalyst and carbon nanotubes in fuel cell devices

Cited by 11 publications

References 21 publications

Degradation aspects of water formation and transport in Proton Exchange Membrane Fuel Cell: A review

Degradation aspects of water formation and transport in Proton Exchange Membrane Fuel Cell: A review

Synthesis and electrocatalytic activity towards oxygen reduction reaction of gold-nanostars

Low and non-platinum electrocatalysts for PEMFCs: Current status, challenges and prospects

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