Electrocatalytic oxidation of glucose on nanoporous gold membranes
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With characteristic of structural integrity and high surface area, nanoporous gold (NPG) prepared by dealloying method is proposed to be a highly sensitive catalyst for glucose electrooxidation. It can be found that a-NPG which obtained by electrochemical corrosion method has the highest sensitivity for glucose electrooxidation among the three studied samples. Under alkaline conditions, the catalytic current density of a-NPG is over 1.5 times and 17 times higher than that of f-NPG (prepared by free corrosion) and poly-Au electrode, respectively. Using a-NPG sample for glucose detection, the obtained minimum sensible concentration are 413 nM in alkaline media and 1 μM in neutral solutions. The a-NPG electrode also shows stable recovery and reproducibility characteristics. These results indicate that NPG may work as an efficient electrode material for electrochemical sensors and a promising catalyst for alkaline glucose fuel cells.
KeywordsGlucose oxidation Nanoporous gold Electrocatalysis Detection Nonenzymatic sensor
We thank Prof. Y. Ding and Houyi Ma for valuable discussions and sharing their nanomaterials and facilities.
- 20.Lee YJ, Park JY (2010) Sens Actuators B: Chem. doi: 10.1016/j.snb.201011037