Adsorption of 1-(2-Propionitrile)-Pyrrolidine (PNP) and Electrochemical Behavior of Product of PNP Adsorption on Smooth Platinum

作者：Zerina T A^*; Pshenichnikov A G

来源：Russian Journal of Electrochemistry, 2008, 44(10): 1175-1179.

DOI：10.1134/S1023193508100157

• adsorption
• electrocatalytic hydrogenation of nitriles
• Pt electrode

The adsorption of 1-(2-propionitrile)-pyrrolidine (PNP) on a polycrystalline smooth platinum electrode in 0.5 M H2SO4 is studied. It is found that PNP is adsorbed practically irreversibly. The time dependence of Pt coverage by the organic substance in semilogarithmic coordinates is linear and is approximated by the Roginskii-Zeldovich equation. The calculated rate constant of PNP adsorption k(ads) = 0.069 mol(-1)s(-1). The product of PNP adsorption is electrochemically active in the range of potentials of E-r = 0.45-0.67 V. Kinetic parameters of the process are determined. The following overall equation is suggested for its description: RCNads + 2H(+) + 2e reversible arrow RCHNHads. The results obtained are compared with the data in PNP adsorption and properties of the product of PNP adsorption in alkaline solutions.

• 出版日期2008-10