Controlled-potential electrosynthesis of glucosaminic acid from glucosamine at a gold electrode
Controlled-potential electrosynthesis of glucosaminic acid from glucosamine at a gold electrode
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DOI：
10.1016/j.elecom.2006.11.024
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发表时间：
2007-05
影响因子：
5.4
通讯作者：
M. Tominaga;M. Nagashima;I. Taniguchi
中科院分区：
文献类型：
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作者：
M. Tominaga;M. Nagashima;I. Taniguchi
研究了在碱性和中性溶液中，以2nm核尺寸的金纳米颗粒（Au ~ 2nm）修饰碳毡电极和金电极对D-氨基葡萄糖（2-氨基-2-脱氧-D-葡萄糖）的电催化氧化。得到了d-氨基葡萄糖在两种溶液中的电催化伏安氧化曲线。在碱性和中性溶液中，Au_（2nm）修饰电极的电催化氧化伏安响应与在金电极上的几乎相同.经电喷雾飞行时间质谱（ESI TOF-MS）鉴定，氧化产物为d-氨基葡萄糖酸（2-氨基-2-脱氧-d-葡萄糖酸）。HPLC结果还表明氧化产物为D-氨基葡萄糖酸。在碱性和中性溶液中，在Au 2nm修饰碳毡电极上对D-氨基葡萄糖进行了控制电位电解.在碱性溶液中，在-0.2V的电势下，以100%的电流效率形成d-氨基葡萄糖酸。在中性溶液中，在0.4V下电解D-氨基葡萄糖酸，电流效率为70%。
The electrocatalytic oxidation of d-glucosamine (2-amino-2-deoxy-d-glucose) in alkaline and neutral solutions was examined using a carbon felt electrode modified with 2nm core sized gold nanoparticles (Au2nmnanoparticles) and a gold plate electrode. The electrocatalytic voltammetric oxidation curves of d-glucosamine were obtained in both solutions. The voltammetric responses for the electrocatalytic oxidation at a Au2nmnanoparticle-modified electrode in both alkaline and neutral solutions were almost the same to those at a gold plate electrode. The oxidized product was identified to be d-glucosaminic acid (2-amino-2-deoxy- d-gluconic acid) generated by the 2-electron oxidation product of d-glucosamine by electrospray ionization time-of-flight mass spectra (ESI TOF-MS). The HPLC results also indicated that the oxidation product was d-glucosaminic acid. The controlled-potential electrolysis of d-glucosamine was performed at the Au2nmnanoparticle-modified carbon felt electrodes in both alkaline and neutral solutions. In the alkaline solution, at a potential of −0.2V, d-glucosaminic acid was formed with a current efficiency of 100%. In the neutral solution, electrolysis at 0.4V on d-glucosaminic acid was obtained with current efficiencies of 70%.