Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1605123 | Journal of Alloys and Compounds | 2016 | 8 Pages |
Abstract
The Cu2O@Pt nanoparticles were prepared by a two-step method, using Vulcan XC-72 carbon as support (donated as Cu2O@Pt/C). Transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy were used to characterize the resulting Cu2O@Pt core-shell nanoparticles. The chemically modified electrode based on Cu2O@Pt/C nanocomposites was employed to eliminate the interference from ascorbic acid and uric acid for the sensitive and selective determination of dopamine. The electrochemical results indicate that the Cu2O@Pt/C nanocomposites show better electrocatalytic activity for the oxidation of dopamine than Pt/C nanocomposites with a linear range from 10 nM to 1027.16 μM, a detection limit of 3 nM (S/N = 3) and sensitivity of 638.0 μA mMâ1 cmâ2. Moreover, the sensor exhibits excellent long-time stability, good reproducibility and can be applied for practical application.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Jiayi Jin, He Mei, Huimin Wu, Shengfu Wang, Qinghua Xia, Yu Ding,