Design of electrodes with both excellent electrocatalytic activity and facile synthesis process is the pivotal challenge in the progress of non-enzymatic glucose sensors. In this work, a series of highly dispersed nickel-carbon nanoparticles modified boron doped diamond composite electrodes were fabricated after the boron doped diamond films with a sputtering nickel layer being annealed at different temperature in hydrogen atmosphere. The surface morphology and interface structure of nickel-carbon nanoparticles modified boron doped diamond samples were characterized detailedly with the increase of annealing temperature. The charge transfer of synthesized electrodes was improved with the increasing content of sp 2 carbon and the improvement of crystallinity of nickel. Therefore, the volcano-type electrocatalytic performance trend was observed with the composite electrode prepared after annealing at 500 °C presenting the best glucose sensing performance with the sensitivities of 1730 and 1081 μA cm −2 mM −1 in glucose concentration ranges of 0.01–2.12 and 2.12–9.06 mM respectively and a low detection limit of 0.2 μM (S/N = 3).
Bibliographical noteFunding Information:
We gratefully acknowledge the National Key Research and Development Program of China (No. 2016YFB0301402 , No. 2016YFB0402705 ), the National Natural Science Foundation of China (No. 51601226 , No. 51874370 , No. 51302173 ), the State Key Laboratory of Powder Metallurgy , the Fundamental Research Funds for the Central Universities of Central South University ( 2018zzts014 and 2017gczd024 ), Hunan Provincial Natural Science Foundation of China (No. 2019JJ50796 ), Hunan Provincial Innovation Foundation for Postgraduate ( CX2018B085 ) and the Open-End Fund for the Valuable and Precision Instruments of Central South University for financial support. The authors also wish to thank the reviewers and editor for kindly giving revising suggestions.
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