Superconductor mixed oxides La2–xSrxCuO4 ±λ for catalytic hydroxylation of phenol in the liquid–solid phase

Abstract

Superconductor mixed oxides are often used as catalysts at high temperature in gas–solid phase oxidations and considered not suitable for lower temperature reactions in the liquid–solid phase; here the catalysis of La_2–xSr_xCuO_{4 ±λ}(x= 0, 0.1, 0.7, 1) mixed oxides in phenol hydroxylation at lower temperatures are studied, and we find that the value of x has a significant effect on catalytic activity: the lower its value, the higher the catalytic activity; a mechanism is proposed to explain the experimental phenomena.