期刊
ANALYTICAL CHEMISTRY
卷 87, 期 6, 页码 3438-3444出版社
AMER CHEMICAL SOC
DOI: 10.1021/ac5047278
关键词
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资金
- National Science Foundation for Fostering Talents in Basic Research of the National Natural Science Foundation of China [J1103307]
- Basic Scientific Research Business Expenses of the Central University
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University [LZUMMM2014001, LZUMMM2014014]
- Fundamental Research Funds for the Central University [lzujbky-2014-189]
- Science and Technology Program of Gansu Province of China [145RJZA176]
In this study, a good core-shell heterostructure of Pt NPs@UiO-66 was fabricated by encapsulating presynthesized platinum nanoparticles (Pt NPs) into the host matrix of UiO-66 which possesses the slender triangular windows with a diameter of 6 A. The transmission electron microscopy images exhibited that the number of the encapsulated Pt NPs and the crystalline morphology of as-synthesized core shell heterostructure samples had a series of changes with increasing the volume of the injected Pt NPs precursor solution. Among these samples, the Pt NPs@UiO-66-2 sample had a good crystalline morphology with several well-dispersed Pt NPs encapsulated in UiO-66 frameworks. But there were no obvious Pt NPs observed in the Pt NP5@UiO-66-1 sample, and for the Pt NP5@UiO-66-3 sample, the number of Pt NPs encapsulated in UiO-66 matrix notably reduced and the metal organic framework (MOF) crystals became small and aggregated. The electrochemical measurements showed that the Pt NP5@UiO-66-2 sample modified glass carbon electrode (GCE) presented a remarkable electrocatalytic activity toward hydrogen peroxide (H2O2) oxidation, including an excellent anti-interference performance even if the concentration of the interference species was the Same: as the H2O2, an extended linear range from 5 mu M to 14.75 mM, a low detection limit, as well as good stability and reptoducibility. The results indicate the superiority of MOFs hi H2O2 detection. And more importantly, it will provide a new opportunity to promote the anti-interference performance of the nonenzyme electrochemical sensors.
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