Abstract The demand of new and environmentally friendly energy sources has induced the research and development of technologies for the energy generation from organic compounds. Among these strategies of energy production by bioelectrochemical systems the enzymatic fuel cells show several potential applications including as power suppliers for non-invasive and implantable medical devices. In this work, a new membrane-less enzymatic biofuel cell based on mediated electron transfer glucose oxidase-anode and direct electron transfer laccase-cathode operated in acidic conditions has been designed and characterized. Both, glucose oxidase/hydroquinone anode and laccase cathode were obtained by enzyme covering on gold electrodes modified with single-walled carbon nanotubes. The maximal current density generated was 3.87 and 2.36 mA cm−2 for the anode and cathode, respectively. The glucose/O2 biofuel cell showed an OCV of 0.52 V and delivered a maximum power density of 0.24 mW cm−2 at 0.27 V in acidic pH conditions. This performance is the higher reported so far without added cofactor to the electrolyte in acidic conditions.

中文翻译：

---

在酸性条件下运行的无膜酶燃料电池

摘要 对新能源和环境友好型能源的需求引发了有机化合物发电技术的研究和开发。在通过生物电化学系统产生能量的这些策略中，酶燃料电池显示出几种潜在的应用，包括作为非侵入性和可植入医疗设备的电源供应商。在这项工作中，设计并表征了一种基于介导电子转移葡萄糖氧化酶-阳极和直接电子转移漆酶-阴极在酸性条件下运行的新型无膜酶生物燃料电池。葡萄糖氧化酶/氢醌阳极和漆酶阴极都是通过酶覆盖在单壁碳纳米管修饰的金电极上获得的。产生的最大电流密度为 3.87 和 2。阳极和阴极分别为 36 mA cm-2。葡萄糖/O2 生物燃料电池显示 0.52 V 的 OCV，并在酸性 pH 条件下在 0.27 V 下提供 0.24 mW cm-2 的最大功率密度。这种性能是迄今为止在酸性条件下没有向电解质添加辅因子的情况下报道的更高。