Cobalt(II) phthalocyanine may be used to develop carbon black based electrocatalysts. CoPC may be used as an end capping agent of a hyperbranched poly(aryl ether ketone) to be used for oxidative decomposition of 2,4,6,-trichlorophenol. CoPC modified carbon paste may be used as indicators for electrocatalytic amperometric measurements. ZnO impregnated with CoPC may be used as a sensitizer to determine the photodegradation of cyanide in aqueous suspension. CoPC catalyzed aerobic regenerations of aldehydes and ketones have been investigated.