화학공학소재연구정보센터
Applied Surface Science, Vol.407, 379-385, 2017
Fabrication of a novel metal chromite - Carbon nanotube composite for the highly efficient electrocatalytic reduction of hydrogen peroxide
The new electrocatalyst, ZnCr2O4/MWCNTs composite was successfully synthesized by hydrothermal method followed by calcination at 500 degrees C. A potential application of ZnCr2O4/MWCNTs composite modified electrode as enzyme-free sensor to monitor H2O2 has been studied. The sensor exhibited a high sensitivity of 1717.14 A mM(-1) cm(-2) and a low detection limit down to 0.11 uM with a linear wide range from 5011M to 34.8 mM with a fast response time of 2 s. In addition, modified electrode performance was investigated by measuring current responses of the sensor for three weeks to confirm the great stability of the proposed sensor. Along with these considerable analytical advantages, the as-prepared composite showed very high specificity to H2O2 with complete elimination of interference from uric acid, ascorbic acid, dopamine and glucose. The sensor gave satisfactory results in a real sample, when employed for determination of H2O2 in lens cleaning solution. (C) 2017 Published by Elsevier B.V.