Controlled growth of spinel CuAl2O4/Cu hybrid nanorods array by electrodeposition in porous aluminum oxide template

► Growth condition of CuAl2O4/Cu hybrids in nano-porous alumina was investigated. ► Applied potential affects both deposition quality and hybrids crystallization. ► The pH value and protection ion determines nature of composite evolved. ► Mechanism for the evolution of CuAl2O4/Cu hybrids was proposed.