Differences in oxygen reduction catalysis of platinised acid treated Showa Denko carbon nanofibres

Sune Veltzé, Elina Yli-Rantala, Maryam Borghei, Eivind Morten Skou

Publikation: Konferencebidrag uden forlag/tidsskriftPosterForskningpeer review

Resumé

The use of carbon as support material for platinum nano-crystallites in polymer electrolyte fuel cells (PEFC) is a common method for increasing the electrochemical specific surface area (ECSA) of platinum. During fuel cell operation, the conditions that catalysts are subjected to lead to various forms of the ECSA degradation: By agglomeration of the platinum crystallites, Rietveld ripening or indirectly by corrosion of the carbon support. Graphitised carbon nanostructures like carbon nanotubes (CNTs), carbon nanofibres (CNFs), etc. are proposed as carbon support substitutes to avoid carbon corrosion, as the nanostructures are thermally and chemically more durable.
The presented work describes the effects on surface defect of acid treated Showa Denko vapour grown carbon fibres (VGCF®/VGCF-H®). A selection of carbon fibres have been platinised and the differences of the oxygen reduction currents without mass transport effects are determined by Koutecký-Levich plots at 900 mV and 850 mV vs. RHE. The normalised kinetic currents of the differently pre-treated fibres are presented from room temperature measurements and elevated temperature measurements.
OriginalsprogEngelsk
Publikationsdato2011
StatusUdgivet - 2011

Fingeraftryk

Carbon nanofibers
Catalysis
Carbon
Oxygen
Platinum
Acids
Crystallites
Specific surface area
Temperature measurement
Fuel cells
Nanostructures
Corrosion
Carbon Nanotubes
Surface defects
Electrolytes
Polymers
Mass transfer
Agglomeration
Vapors
Degradation

Citer dette

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title = "Differences in oxygen reduction catalysis of platinised acid treated Showa Denko carbon nanofibres",
abstract = "The use of carbon as support material for platinum nano-crystallites in polymer electrolyte fuel cells (PEFC) is a common method for increasing the electrochemical specific surface area (ECSA) of platinum. During fuel cell operation, the conditions that catalysts are subjected to lead to various forms of the ECSA degradation: By agglomeration of the platinum crystallites, Rietveld ripening or indirectly by corrosion of the carbon support. Graphitised carbon nanostructures like carbon nanotubes (CNTs), carbon nanofibres (CNFs), etc. are proposed as carbon support substitutes to avoid carbon corrosion, as the nanostructures are thermally and chemically more durable. The presented work describes the effects on surface defect of acid treated Showa Denko vapour grown carbon fibres (VGCF{\circledR}/VGCF-H{\circledR}). A selection of carbon fibres have been platinised and the differences of the oxygen reduction currents without mass transport effects are determined by Kouteck{\'y}-Levich plots at 900 mV and 850 mV vs. RHE. The normalised kinetic currents of the differently pre-treated fibres are presented from room temperature measurements and elevated temperature measurements.",
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Differences in oxygen reduction catalysis of platinised acid treated Showa Denko carbon nanofibres. / Veltzé, Sune ; Yli-Rantala, Elina; Borghei, Maryam; Skou, Eivind Morten.

2011.

Publikation: Konferencebidrag uden forlag/tidsskriftPosterForskningpeer review

TY - CONF

T1 - Differences in oxygen reduction catalysis of platinised acid treated Showa Denko carbon nanofibres

AU - Veltzé, Sune

AU - Yli-Rantala, Elina

AU - Borghei, Maryam

AU - Skou, Eivind Morten

PY - 2011

Y1 - 2011

N2 - The use of carbon as support material for platinum nano-crystallites in polymer electrolyte fuel cells (PEFC) is a common method for increasing the electrochemical specific surface area (ECSA) of platinum. During fuel cell operation, the conditions that catalysts are subjected to lead to various forms of the ECSA degradation: By agglomeration of the platinum crystallites, Rietveld ripening or indirectly by corrosion of the carbon support. Graphitised carbon nanostructures like carbon nanotubes (CNTs), carbon nanofibres (CNFs), etc. are proposed as carbon support substitutes to avoid carbon corrosion, as the nanostructures are thermally and chemically more durable. The presented work describes the effects on surface defect of acid treated Showa Denko vapour grown carbon fibres (VGCF®/VGCF-H®). A selection of carbon fibres have been platinised and the differences of the oxygen reduction currents without mass transport effects are determined by Koutecký-Levich plots at 900 mV and 850 mV vs. RHE. The normalised kinetic currents of the differently pre-treated fibres are presented from room temperature measurements and elevated temperature measurements.

AB - The use of carbon as support material for platinum nano-crystallites in polymer electrolyte fuel cells (PEFC) is a common method for increasing the electrochemical specific surface area (ECSA) of platinum. During fuel cell operation, the conditions that catalysts are subjected to lead to various forms of the ECSA degradation: By agglomeration of the platinum crystallites, Rietveld ripening or indirectly by corrosion of the carbon support. Graphitised carbon nanostructures like carbon nanotubes (CNTs), carbon nanofibres (CNFs), etc. are proposed as carbon support substitutes to avoid carbon corrosion, as the nanostructures are thermally and chemically more durable. The presented work describes the effects on surface defect of acid treated Showa Denko vapour grown carbon fibres (VGCF®/VGCF-H®). A selection of carbon fibres have been platinised and the differences of the oxygen reduction currents without mass transport effects are determined by Koutecký-Levich plots at 900 mV and 850 mV vs. RHE. The normalised kinetic currents of the differently pre-treated fibres are presented from room temperature measurements and elevated temperature measurements.

M3 - Poster

ER -