CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Hydrogen oxidation reaction on thin platinum electrodes in the polymer electrolyte fuel cell

M. Wesselmark ; Björn Wickman (Institutionen för teknisk fysik, Kemisk fysik ; Kompetenscentrum katalys (KCK)) ; C. Lagergren ; Göran Lindbergh
Electrochemistry Communications (1388-2481). Vol. 12 (2010), 11, p. 1585-1588.
[Artikel, refereegranskad vetenskaplig]

A method for measuring the kinetics of the hydrogen oxidation reaction (HOR) in a fuel cell under enhanced mass transport conditions is presented. The measured limiting current density was roughly 1600 mA cm(Pt)(-2), corresponding to a rate constant of the forward reaction in the Tafel step of 0.14 mol m(-2) s(-1) at 80 degrees C and 90% RH. The exchange current density for the HOR was determined using the slope at low overvoltages and was found to be 770 mA cmp(Pt)(-2). The high values for the limiting and exchange current densities suggest that the Pt loading in the anode catalyst can be reduced further without imposing measurable voltage loss.

Nyckelord: Hydrogen oxidation reaction; Limiting current density; Exchange current density; PEMFC; Fuel cell; Thermal evaporation



Denna post skapades 2010-09-13. Senast ändrad 2015-07-02.
CPL Pubid: 126189

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för teknisk fysik, Kemisk fysik (1900-2015)
Kompetenscentrum katalys (KCK)

Ämnesområden

Kemisk fysik

Chalmers infrastruktur

Relaterade publikationer

Denna publikation ingår i:


Nanostructured Model Electrodes for Studies of Fuel Cell Reactions