Optimization of S-dopant on N, S co-doped graphene/CNT-Fe3C nanocomposite electrode for non-enzymatic H2O2 sensor

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.

Automated summary

In this study, N, S co-doped graphene/CNT-Fe3C composite materials were prepared using a high-temperature pyrolytic synthesis process, and the optimization of heteroatom doping for electrocatalytic performance towards H2O2 detection was characterized. The NS-G/CNTFe-1 electrode showed excellent catalytic activity for non-enzymatic hydrogen peroxide sensing with rapid response time, high cathodic current, wide linear range, high selectivity, and good operational stability.