Small Naked Pt Nanoparticles Confined in Mesoporous Shell of Hollow Carbon Spheres for High-Performance Nonenzymatic Sensing of H2 O2 and Glucose

ACS Omega
Chunmei ZhangWei Chen

Abstract

Nonenzyme direct electrochemical sensing of hydrogen peroxide and glucose by highly active nanomaterial-modified electrode has attracted considerable attention. Among the reported electrochemical sensing materials, hollow carbon sphere (HCS) is an attractive carbon support because of its large specific surface area, porous structure, and easy accessibility for target molecules. In this study, naked Pt nanoparticles with average size of 3.13 nm are confined in mesoporous shells of hollow carbon spheres (Pt/HCS) by using one-step synthesis, which can not only produce highly dispersed Pt nanoparticles with clean surface, but also avoid the relatively slow impregnation-reduction process. The surface area of the obtained Pt/HCS (566.30 m2 g-1) is larger than that of HCS, attributing to the enlarged surface area after Pt nanoparticles deposition. The average pore width of Pt/HCS (3.33 nm) is smaller than that of HCS (3.84 nm), indicating the filling of Pt nanoparticles in the mesopores of carbon shells. By using the as-synthesized Pt/HCS as nonenzymatic sensing material, H2O2 and glucose can be detected with high sensitivity and selectivity. The linear range toward H2O2 sensing is from 0.3 to 2338 μM, and the limit of detection (LOD)...Continue Reading

References

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Citations

Jan 14, 2019·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Yan-Wen BaoFu-Gen Wu
Oct 15, 2020·Reviews in Endocrine & Metabolic Disorders·Rout George KerrySabuj Sahoo
Mar 30, 2021·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Azka AwaisTianli Yue

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Methods Mentioned

BETA
transmission electron microscopy
X-ray
surface plasmon resonance
transmission

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