pH值对高锰酸钾作阴极的微生物燃料电池阴极电位的影响  

Effect of pH on Cathodic Potential of Microbial Fuel Cell with Potassium Permanganate as Cathode

作　　者：吴君豪 

机构地区：[1]西安铁一中滨河学校,陕西西安710038

出　　处：《云南化工》2017年第8期62-65,共4页Yunnan Chemical Technology

摘　　要：构建了一个以葡萄糖水溶液为阳极原料,高锰酸钾为阴极氧化剂的双室微生物燃料电池。考察了MnO_4溶液的pH值对MFC产电性能的影响。结果表明,在pH值不同时,其对MFC的还原电位和MnO_4的还原产物有显著影响。当pH>3时,阴极E°=+1.51V,当pH>11时,E°=+0.56V。研究表明:(1)二氧化锰沉淀是导致阴极极化的主要原因,当阴极电解液流动时可有效抑制二氧化锰的沉淀。(2)根据电池电压曲线图判断,pH值对电池的阴极电位有较大影响,电池电压的变化与阴极电位变化具有很好的一致性,但不会对阳极电位造成影响。(3)pH值对阴极电势的影响符合Nernst方程。this paper constructs ＇a dual - chamber microbial fuel cell with a glucose solution as an anode material and potassium permanganate as a cathode oxidant.The influence of pH value of MnO4 solution on the properties of MFC was investigated.The results show that the reduction potential of MFC and the reduction of MnO4 have significant influence on the pH value.Cathode when the pH 〉 3°E=1.51 V, when the pH 〉 11, °E=0.56 V.Furthermore, the study shows that： 1）manganese dioxide precipitation is the main cause of cathode polarization, and the precipitation of manganese dioxide can be effectively suppressed when the cathode electrolyte flows.2）according to the battery voltage graph, pH value of has a great influence on the cathode of the battery , the battery voltage and cathode potential changes has tbe very good consistency , butit will not affect the anode potential.3）the influence of pH on cathode potential conforms to Nernst equation.This paper provides reference for MFC industrialization.

关 键 词：P H值 高锰酸钾 微生物燃料电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动]