Preparation and electrocatalytic properties of nitrogen doped porous carbon loaded copper and cobalt nanocomposite

Abstract

Nitrogen doped porous carbon nanopolyhedra (NPC) derived from ZIF-8 was firstly prepared by high temperature carbonization. Subsequently, copper and cobalt were decorated on NPC to form novel nanocomposite by one-step chemical reduction method. Cu@Co/NPC hybrid material was characterized using X-ray powder diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. The composite was modified on the surface of glassy carbon electrode to study its electrochemical response to hydrazine. The results show that Cu@Co /NPC nanocomposites play a synergistic role, which shows better electrocatalytic effect on hydrazine than single component modified electrode. Under the optimum conditions, the concentration of composite modified electrode and hydrazine in the range of 5-1850 μmol/L exhibits good linear relationship, and the detection limit is 0.08 μmol/L. In addition, the composite modified electrode has good stability, reproducibility and selectivity for the determination of hydrazine. It has been successfully used for the determination of hydrazine in environmental water samples with satisfactory results.

Keywords

• cu@co
• n-doped porous carbon
• nanocomposite
• hydrazine
• electrochemical detection