STUDY OF Bi,Re ADATOMES ON POLYCRYSTALLINE RHODIUM ELECTRODE IN PHOSPHATE MEDIUM.

摘要

The underpotential deposition(UPD)of metal on foreign metal substrates has been studied with a wide variety of electrochemical and spectroscopic methods.In particular,the elec-trodeposition of Bi,Pb,Cd,on rhodium in the oxidation of formic acid has received a great deal of attention using technique IR"in situ":Electrochemical Modulated Infrared Reflectance Spectroscopy(EMIRS)(1,2).This interest stems from a recognition of the influence fractional monolayer UPD may have on electrodes substrates in applications for electrocatalysis of electrosynthetic and fuel cell reactions,corrosion inhibition,etc.In this work,we report the effects of bismuth and rhenium adatomes on rhodium on hydrogen adsorption-desorption,formic acid and butane oxidation in solution of phosphoric acid.