Lowering the potential of electroenzymatic glucose oxidation on redox hydrogel-modified porous carbon electrode
Lowering the potential of electroenzymatic glucose oxidation on redox hydrogel-modified porous carbon electrode
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DOI：
10.1016/j.electacta.2017.03.007
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发表时间：
2017-04
影响因子：
6.6
通讯作者：
Aimi Suzuki;N. Mano;S. Tsujimura
中科院分区：
文献类型：
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作者：
Aimi Suzuki;N. Mano;S. Tsujimura
在这里，我们证明了高电流密度每投影表面积的葡萄糖在低电位下使用的分层结构的电极的基础上MgO模板碳的电酶促氧化。通过将葡萄糖氧化酶（GOx）与具有低形式电位（-0.03 V vs. Ag）的锇基氧化还原聚合物组装来制备修饰电极|AgCl），其中Os络合物通过13个原子的烷基链和交联剂栓系到聚合物主链上。葡萄糖氧化电流密度为15 mA cm-2，在0 V vs. Ag下测得|AgCl，37 °C，pH 7，在0.3 V时平台值为50 mA cm− 2。由相同的氧化还原聚合物和FAD依赖性葡萄糖脱氢酶组成的水凝胶电极仅递送用GOx电极获得的电流密度的10%。
Herein, we demonstrate high current densities per projected surface area for the electroenzymatic oxidation of glucose at low potential using a hierarchically structured electrode based on MgO-templated carbon. The modified electrode was prepared by assembling glucose oxidase (GOx) with an osmium-based redox polymer with a low formal potential (−0.03 V vs. Ag|AgCl), in which Os complexes are tethered to the polymer backbone via a 13-atom alkyl chain and a crosslinker. A glucose oxidation current density of 15 mA cm−2was measured at 0 V vs. Ag|AgCl at 37 °C and pH 7, with a plateau value of 50 mA cm−2at 0.3 V. The hydrogel electrodes composed of the same redox polymer and FAD-dependent glucose dehydrogenase delivered only 10% of the current densities obtained with the GOx electrode.