An unusual H2O2 electrochemical sensor based on Ni(OH)2 nanoplates grown on Cu substrate |
| |
Authors: | Aixia Gu Guangfeng Wang Jing Gu Bin Fang |
| |
Affiliation: | a College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China b Anhui Key Laboratory of Functional Molecular Solids, Anhui Normal University, Wuhu 241000, PR China c Anhui Key Laboratory of Chem-Biosensing, Anhui Normal University, Wuhu 241000, PR China |
| |
Abstract: | In this work, Ni(OH)2 nanoplates grown on the Cu substrate were synthesized and characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Then a novel Cu-Ni(OH)2 modified glass carbon electrode (Cu-Ni(OH)2/GCE) was fabricated and evaluated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and typical amperometric response (i-t) method. Exhilaratingly, the Cu-Ni(OH)2/GCE shows significant electrocatalytic activity toward the reduction of H2O2. At an applied potential of −0.1 V, the sensor produces an ultrahigh sensitivity of 408.1 μA mM−1 with a low detection limit of 1.5 μM (S/N = 3). The response time of the proposed electrode was less than 5 s. What's more, the proposed sensor displays excellent selectivity, good stability, and satisfying repeatability. |
| |
Keywords: | Cu-Ni(OH)2 Nanocomposites Electocatalysis Amperometric sensor H2O2 |
本文献已被 ScienceDirect 等数据库收录! |
|