Acidic and alkaline pretreatments of activated carbon and their effects on the performance of air-cathodes in microbial fuel cells

被引：88

作者：

Wang, Xin ^{[1
]}

Gao, Ningshengjie ^{[1
]}

Zhou, Qixing ^{[1
]}

Dong, Heng ^{[1
]}

Yu, Hongbing ^{[1
]}

Feng, Yujie ^{[2
]}

机构：

[1] Nankai Univ, MOE Key Lab Pollut Proc & Environm Criteria, Tianjin Key Lab Environm Remediat & Pollut Contro, Tianjin 300071, Peoples R China

[2] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2013年 / 144卷

基金：

中国国家自然科学基金;

关键词：

Microbial fuel cell; Activated carbon; Pretreatment; Surface pH; Porous analysis; CATALYST LAYER; PTFE;

D O I：

10.1016/j.biortech.2013.07.022

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

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 degrees 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 Omega) 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. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：632 / 636

页数：5

共 14 条

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