Hydrogen evolution assisted deposition of a three-dimensional porous nickel film for the electrocatalytic oxidation of histamine
| Autor: | Xue Ying, Na Zhao, Bang-Ce Ye, Xiling Deng, Jia Wang, Yuan Liu, Yingchun Li |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Scanning electron microscope 010401 analytical chemistry Analytical chemistry chemistry.chemical_element 02 engineering and technology Microporous material 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Analytical Chemistry Electrochemical gas sensor Nickel X-ray photoelectron spectroscopy chemistry Plating Electrode Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Microchimica Acta. 184:3893-3900 |
| ISSN: | 1436-5073 0026-3672 |
| DOI: | 10.1007/s00604-017-2411-0 |
| Popis: | The authors describe an electrochemical sensor for ultrasensitive voltammetric of histamine (HA) by using a gold electrode that was modified with a film consisting of three-dimensional activated microporous nickel (AMPNi/GE). The porous nickel film was deposited on the electrode by hydrogen evolution assisted electrodeposition. The sensor was characterized via scanning electron microscopy, energy dispersive spectrometry, X-ray photoelectron spectroscopy and cyclic voltammetry in order to evaluate its morphology, composition and electrochemical properties. The pore size and wall thickness of the nickel skeleton were tailored by optimizing the concentration of the plating solution, operating temperature, and deposition time. Under the optimum conditions and in 0.1 M NaOH solution at a typical potential of 0.63 V (vs. Ag/AgCl) at a scan rate of 100 mV s−1, the sensor gives an analytical response over the 10 nM to 80 μM HA concentration range, with a 4.2 nM detection limit (S/N = 3) and a 2.38 μA·μM−1·cm−2 sensitivity. The method is sensitive, repeatable, and the sensor is stable. |
| Databáze: | OpenAIRE |
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