▎ 摘　　要

A high temperature pyrolytic synthesis process was used to prepare N, S co-doped graphene/CNT-Fe3C composite materials. The optimization of heteroatom doping and its electrocatalytic performance towards H2O2 detection is significantly characterized and evaluated. The non-enzymatic hydrogen peroxide sensing is well catalyzed at NS-G/CNTFe-1 (10:1 weight ratio of melamine and thiourea) electrode with rapid response time and high cathodic current at-0.15 V (vs. Ag/AgCl), as compared to other modified electrodes. Chronoamperometry study reveals that the NS-G/CNTFe-1 electrode has a wide linear range with high selectivity and good operational stability. (c) 2020 Elsevier B.V. All rights reserved.