Electrocatalytic reduction of aldehydes and ketones was studied using a nickel (II) tetraazamacrocyclic complex-modified graphite felt (GF) electrode. The nickel (II) tetraazamacrocyclic complex-modified GF electrode was prepared by attaching nickel (II)(6- (2′-hydroxyethyl)-1, 4, 8, 11-tetraazacyclotetradecane) perchlorate chemically to the carboxyl groups of a thin poly (acrylic acid)(PAA) layer coated on the GF. The modified ...