Electrochemical characterization of tungsten carbonyl compound for oxygen reduction reaction
Por:
Pattabi M., Castellanos R.H., Castillo R., Ocampo A.L., Moreira J., Sebastian P.J., McClure J.C., Mathew X.
Publicada:
1 ene 2001
Resumen:
The results of electrochemical studies carried out on Wx(CO)n electrocatalyst are presented in this article. Wx(CO)n was synthesized from W(CO)6 in xylene at 140 °C. The kinetic studies were carried out in 0.5 M H2SO4 solution under a three-electrode configuration. Linear voltametry studies on Wx(CO)n reveal significant catalytic activity of the material for oxygen reduction. Koutecky-Levich analysis of the voltametry data shows that the reaction follows first-order kinetics and the value of the Koutecky-Levich slope indicates a multi-electron charge transfer in the oxygen reduction reaction. The value of Tafel slope is found to be -120 mV/decade from the mass-transfer-corrected Tafel plots. The charge transfer coefficient and exchange current density were found to be 0.66 and 8.4×10-5 A/cm2, respectively.
|