活性炭的酸碱预处理及其对微生物燃料电池空气阴极性能的影响。
Acidic and alkaline pretreatments of activated carbon and their effects on the performance of air-cathodes in microbial fuel cells.
机构信息
MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Nankai District, Tianjin 300071, China.
出版信息
Bioresour Technol. 2013 Sep;144:632-6. doi: 10.1016/j.biortech.2013.07.022. Epub 2013 Jul 11.
Activated carbon (AC) is a high performing and cost effective catalyst for oxygen reduction reactions (ORRs) of air-cathodes in microbial fuel cells (MFCs). Acidic (HNO3) and alkaline (KOH) pretreatments on AC at low temperature (85°C) are conducted to enhance the performance of MFCs. The alkaline pretreatment increased the power density by 16% from 804±70 to 957±31 mW m(-2), possibly due to the decrease of ohmic resistance (from 20.58 to 19.20 Ω) and the increase of ORR activities provided by the adsorbed hydroxide ion and extra micropore area/volume after alkaline pretreatment. However, acidic pretreatment decreased the power output to 537±36 mW m(-2), which can be mainly attributed to the corrosion by adsorbed proton at the interface of AC powder and stainless steel mesh and the decreased pore area.
活性炭（AC）是一种高性能、低成本的催化剂，可用于微生物燃料电池（MFC）的空气阴极的氧还原反应（ORR）。在低温（85°C）下对 AC 进行酸性（HNO3）和碱性（KOH）预处理，以提高 MFC 的性能。碱性预处理将功率密度从 804±70 提高到 957±31 mW m(-2)，提高了 16%，这可能是由于欧姆电阻（从 20.58 降低到 19.20 Ω）的降低以及碱性预处理后吸附的氢氧根离子和额外的微孔面积/体积提供的 ORR 活性的增加。然而，酸性预处理将功率输出降低到 537±36 mW m(-2)，这主要归因于 AC 粉末和不锈钢网界面处吸附质子的腐蚀以及孔面积的减少。
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