期刊
NANOMATERIALS
卷 9, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/nano9081109
关键词
polyaniline; platinum-nickel nanoparticles; reduced graphene oxide; nonenzymatic detection; hydrogen peroxide
类别
资金
- Shenzhen Fundamental Research Funds [JCYJ20170302145500980]
- Nature Science Foundation of Shenzhen University [2016001]
- Nanshan District Key Lab for Biopolymers and Safety Evaluation [KC2014ZDZJ0001A]
- Shenzhen Sci & Tech research grant [ZDSYS201507141105130]
A hierarchical composite based on the modified reduced graphene oxide with platinum-nickel decorated polyaniline nano-spheres (rGO/PANI@PtNi) was facilely prepared via microwave-assisted self-reduction for an application in nonenzymatic hydrogen peroxide (H2O2) detection. Compared to the pristine rGO, the composite exhibited a much tougher surface due to the stacking of conductive PANI nano-spheres on rGO sheets, leading to good dispersion of PtNi nanoparticles and a large active area. Furthermore, the multi-valance Ni2+/3+ in the PtNi particles effectively promoted the catalytic property of Pt sites and facilitated a superior electrochemical performance of PtNi alloy than that of neat Pt. Owing to the synergistic effect of the improved electrical conductivity and the promoted electrocatalytical property, the modified glassy carbon electrode (GCE) with rGO/PANI@PtNi nanocomposite displayed an outstanding electrochemical sensitivity towards H2O2 with a fast response time (<2 s), a wide linear range (0.1-126.4 mM), a low detection limit (0.5 mu M), as well as a long-life stability for one week without obvious degradation. This novel strategy opens a novel and promising approach to design high performance sensors for H2O2 detection.
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