Low-cost biochar derived from corncob as oxygen reduction catalyst in air cathode microbial fuel cells
Low-cost biochar derived from corncob as oxygen reduction catalyst in air cathode microbial fuel cells
复制标题
源自玉米芯的低成本生物炭作为空气阴极微生物燃料电池中的氧还原催化剂
DOI：
10.1016/j.electacta.2018.07.010
复制
发表时间：
2018-09-01
影响因子：
6.6
通讯作者：
Tang, Jinfeng
中科院分区：
文献类型：
--
作者：
Li, Meng;Zhang, Hongguo;Tang, Jinfeng
以玉米芯为原料，采用简易热解法在250-750 ℃的温度范围内制备了廉价的生物炭，并将其作为空气阴极微生物燃料电池（MFC）的氧还原反应（ORR）催化剂。所得生物炭在650 ℃（CC-650）下显示出高达655.89 m（2）g（-1）的优异电化学活性面积，并且成功地将各种形式的氮引入到碳分子骨架中。电化学测试结果表明，石墨态氮和吡啶态氮含量最高的CC-650能促进电子转移，通过四电子途径参与ORR。在MFC测试中，CC-650阴极的最大输出电压和功率密度分别为0.221 V和458.85 mW m（-3），明显高于其他生物炭。我们的研究结果表明，一个潜在的路线的基础上可持续和经济的生物炭作为有前途的氧还原催化剂MFC。(C)2018爱思唯尔有限公司版权所有
Low-cost biochar derived from corncob was prepared by a facile pyrolysis method at controlled temperatures (250-750 degrees C) and the biochar was employed as oxygen reduction reaction (ORR) catalyst in air cathode microbial fuel cells (MFCs). The obtained biochar at 650 degrees C (CC-650) showed an excellent electrochemical active area up to 655.89 m(2) g(-1), and various forms of nitrogen were introduced to the carbon molecular skeleton successfully. The electrochemical measurements indicated that the CC-650 with the highest contents of graphitic and pyridinic nitrogen can accelerate the electron transfer to participate in ORR by a four-electron pathway. In MFCs tests, the maximum output voltage and power density with CC-650 cathode was 0.221 V and 458.85 mW m(-3) respectively, which was significantly higher than those of the other biochar. Our results demonstrated a potential route based on sustainable and economical biochar as promising oxygen reduction catalyst for MFCs. (C) 2018 Elsevier Ltd. All rights reserved.