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Degradation studies...
Degradation studies of PEMFC cathodes based on different types of carbon
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- Wesselmark, Maria, 1977- (författare)
- KTH,Tillämpad elektrokemi
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- Lagergren, Carina (författare)
- KTH,Tillämpad elektrokemi
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- Lindbergh, Göran (författare)
- KTH,Tillämpad elektrokemi
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(creator_code:org_t)
- The Electrochemical Society, 2009
- 2009
- Engelska.
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Ingår i: ECS Transactions. - : The Electrochemical Society. - 1938-5862 .- 1938-6737. - 9781566777384 ; , s. 1241-1250
- Relaterad länk:
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http://www.ecsdl.org...
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visa fler...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In this study different accelerated degradation tests were used evaluating three different carbon supports as well as a thin model electrode. Cyclic ADTs, by 1000 cycles beween 0.6 and 1.2 V in nitrogen, did not degrade the porous electrodes to any larger extent in terms of oxygen reduction activity, whereas a significant loss of electrochemical surface area was seen, often more than 50%. Potentiostatic hold at 1.4 V during 3 h, did not permanently degrade the electrodes but instead an improved activity was obtained after rest during night. A correlation of increase in double layer capacitance and improved performance was seen and believed to be caused by the good proton conductivity of carbon surface oxides. CO-stripping peaks revealed that the humidity and wetting of Nafion⢠may have caused the observed temporary changes during the potentiostatic hold. ©The Electrochemical Society.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Nyckelord
- Accelerated degradation tests
- Carbon support
- Carbon surface oxides
- Degradation study
- Double-layer capacitance
- Electrochemical surface area
- Oxygen Reduction
- PEMFC cathode
- Porous electrodes
- Potentiostatics
- Degradation
- Electrolytic reduction
- Membranes
- Oxygen
- Proton exchange membrane fuel cells (PEMFC)
- Protons
- Stripping (dyes)
- Electrochemical electrodes
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)
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