Abstract
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.
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We thank Prof. Y. Ding and Houyi Ma for valuable discussions and sharing their nanomaterials and facilities.
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Li, Q., Cui, S. & Yan, X. Electrocatalytic oxidation of glucose on nanoporous gold membranes. J Solid State Electrochem 16, 1099–1104 (2012). https://doi.org/10.1007/s10008-011-1501-x
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DOI: https://doi.org/10.1007/s10008-011-1501-x