Electrodeposition of pore-confined cobalt in metal–organic framework thin films toward electrochemical H2O2 detection
| Autor: | Yu Chuan Chen, Chung Wei Kung, Wei Huan Ho, Yu Shan Chang, Jun Hong Li, Yi Da Song |
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| Rok vydání: | 2020 |
| Předmět: |
Detection limit
Zirconium Materials science General Chemical Engineering chemistry.chemical_element 02 engineering and technology Substrate (electronics) 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Amperometry 0104 chemical sciences chemistry Chemical engineering Metal-organic framework Thin film 0210 nano-technology Cobalt |
| Zdroj: | Electrochimica Acta. 347:136276 |
| ISSN: | 0013-4686 |
| Popis: | In this study, cobalt is electrodeposited within solvothermally grown thin films of a zirconium-based metal–organic framework, MOF-808, to obtain electrochemically active cobalt confined in the pore of MOF-808 crystals. With the help of the highly porous but electrically insulating MOF-808 thin film and a step-wise electrodepositing technique, cobalt can be mainly deposited within the pore of MOF-808 crystals. The resulting Co@MOF-808 thin film is applied for electrochemical H2O2 sensor in aqueous electrolytes, and its electrocatalytic activity toward H2O2 significantly outperforms that of the electrodeposited cobalt on a bare substrate. The electrochemical behavior of Co@MOF-808 thin films and the corresponding electrocatalytic mechanism toward H2O2 are investigated. The material is further used for amperometric H2O2 detection, and a sensitivity, limit of detection, and linear range of 382.27 μA/mM-cm2, 1.3 μM, and 10–450 μM can be achieved, respectively. |
| Databáze: | OpenAIRE |
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