期刊
RSC ADVANCES
卷 3, 期 1, 页码 281-287出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ra21998k
关键词
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资金
- National Natural Science Foundation of China [20603014, 20673059, 20973061, 20903051]
- Chinese Ministry of Education [105074]
- Committee of Science and Technology of Shanghai [0652nm010, 08JC1408100]
- Fundamental Research Funds for the Central Universities [lzujbky-2011-116, lzujbky-2010-36]
In this study, a novel composite of cobalt hexacyanoferrate nanoparticles (CoNP) and platinum nanoparticles (Pt) on carbon nanotubes (CNTs) is obtained by ultrasonically mixing CoNP synthesized in a microemulsion with CNTs chemically modified with platinum nanoparticles (Pt/CNTs). Cyclic voltammetric and amperometric measurements on a glass carbon electrode showed that the composite (called CoNP-Pt/CNTs) exhibits a well-defined pair of redox peaks and a prominent electrocatalytic activity toward hydrogen peroxide (H2O2) reduction. Besides, the current response of CoNP-Pt/CNTs is 2 orders of magnitude higher than the response of CoNP alone and 1 order of magnitude higher than the response of Pt/CNTs or CoNP/CNTs alone. This higher efficiency can be attributed to a remarkable synergistic effect between CoNP, Pt and CNTs. This sensor shows a linear response to H2O2 concentrations ranging from 0.2 mu M to 1.25 mM with a detection limit of 0.1 mu M, a maximum sensitivity of 0.744 A.M-1 and a fast response time below 2 s.
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