Electrooxidation of CO(ad) intermediated from methanol oxidation on polycrystalline Pt electrode.
The poisonous intermediate of methanol oxidation on a Pt electrode was validated to be CO(ad) by electrochemical method. An approximate treatment to bimolecular elementary reactions on an electrode was advanced and then was applied to the stripping normal pulse voltammetry (NPV) for complex multistep multielectron transfer processes on plane electrodes to study the kinetics of completely irreversible process of CO(ad) oxidation to CO2. The kinetic parameters for this process, such as standard rate constant (k0) and anodic transfer coefficient (alpha) for this irreversible heterogeneous electron-transfer process at electrode/solution interface and apparent diffusion coefficient (D(app)) for charge-transfer process within the monolayer of CO(ad) on electrode surface, were obtained with stripping NPV method. The effect of the approximate treatment on the kinetic parameters was also analyzed.
Xu
Weilin
W
State Key Laboratory of Electro-analytical Chemistry, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, Jilin, PR China.
Lu
Tianhong
T
Liu
Changpeng
C
Xing
Wei
W