Abstract
The phenomenon of electrochemiluminescence (ecl) during cathodic polarization of the np 1-metals (Al, Ga and In) in peroxydisulfate solutions under different values of pH is studied. It is proposed that the source of the light emission is a radiative deactivation of the singlet dioxygen, which is generated in the electrochemical system. A quantum-mechanical simulation of the free radical recombination reaction, during which the singlet dioxygen is generated, was carried out. It was determined that the HO 2 – OH-recombination may proceed, under certain conditions, without a potential barrier, while the minimum potential barrier for the SO 4 −– O 2H-recombination (equals 27.1 kJ mol −1) is observed at an angle of attack 100°.
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