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| Preparation of a Novel Urchin-like Tungsten Copper Self-supporting Electrode for Enzymeless Glucose Sensing |
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| DOI： |
| KeyWord:urchin-like structure glucose electrocatalytic oxidation electrochemical detection |
| Author | Institution |
| PEI Yuan-jiao，CHEN Yuan，ZHOU Zhen，JING Yi-qi，TAN An-na，WANG Rui-juan |
Guangxi Key Laboratory of Agricultural Resources Chemistry and Biotechnology，Colleges and Universities Key Laboratory for Efficient Use of Agricultural Resources in the Southeast of Guangxi，College of Chemistry and Food Science，Yulin Normal University，Yulin ，China |
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| Abstract: |
| A novel urchin-like tungsten copper（U－WCu） self-supporting electrode for electrochemical detection of glucose was rapidly and efficiently fabricated by square wave pulse method on the surface of smooth W70Cu30 electrode in this paper．The U－WCu electrode showed a better electrochemical performance than the nano-copper（N－Cu）．Effects of pulse time，pulse frequency and potential range on the electrocatalytic oxidation of glucose were investigated in detail．Cyclic voltammetry（CV） was used to compare the electrocatalytic oxidation behaviors of glucose between U－WCu electrode and N－Cu electrode in 0.1 mol/L NaOH solution，and an enzyme-free electrochemical sensor based on the U－WCu electrode was constructed．The electrode has a wide linear range（2 μmol/L－10 mmol/L），a low detection limit（S/N = 3） for glucose（0.21 μmol/L） and a high sensitivity up to 4 983 μA?mmol?L-1?cm-2．Moreover，the sensor exhibited excellent repeatability，reproducibility，stability and good anti-interference，and it was successfully applied to the determination of glucose content in glucose injection. |
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