TY - JOUR
T1 - Mechanically milled ruxfey electrocatalyst for oxygen reduction in acid media
AU - Sotelo-Mazón, P.
AU - González-Huerta, R. G.
AU - Cabañas-Moreno, J. G.
AU - Solorza-Feria, O.
PY - 2007
Y1 - 2007
N2 - Electrocatalytic oxygen reduction reaction (ORR) on RuxFey fine particles prepared by mechanical milling was investigated in a sulfuric acid electrolyte. The activity of the catalysts with Vulcan carbon powder dispersed into a Nafion film coated on a glassy carbon (ink-type electrode) was studied by using the rotating disk electrode technique, RDE. Polarization measurements showed that the ORR occurs through a first order reaction with respect to oxygen with a mechanism involving four electrons transfer to water formation. A Tafel slope of ca. 0.120 V dec-1, and an exchange current density of 5.08 x 10-5 mA cm-2 was deduced from the mass transfer corrected polarization curves. The kinetic parameters were compared with commercial electrocatalysts and are in agreement with previous results for other types of Ru-based electrocatalysts, prepared in organic solvents.
AB - Electrocatalytic oxygen reduction reaction (ORR) on RuxFey fine particles prepared by mechanical milling was investigated in a sulfuric acid electrolyte. The activity of the catalysts with Vulcan carbon powder dispersed into a Nafion film coated on a glassy carbon (ink-type electrode) was studied by using the rotating disk electrode technique, RDE. Polarization measurements showed that the ORR occurs through a first order reaction with respect to oxygen with a mechanism involving four electrons transfer to water formation. A Tafel slope of ca. 0.120 V dec-1, and an exchange current density of 5.08 x 10-5 mA cm-2 was deduced from the mass transfer corrected polarization curves. The kinetic parameters were compared with commercial electrocatalysts and are in agreement with previous results for other types of Ru-based electrocatalysts, prepared in organic solvents.
KW - Catalytic activity
KW - Mechanical milling
KW - Oxygen reduction
KW - Ru-Fe electrocatalyst
UR - http://www.scopus.com/inward/record.url?scp=46749129386&partnerID=8YFLogxK
M3 - Artículo
SN - 1452-3981
VL - 2
SP - 523
EP - 533
JO - International Journal of Electrochemical Science
JF - International Journal of Electrochemical Science
IS - 7
ER -