温度对电自养氧还原生物阴极电化学性能的影响

Effects of different temperature on the electrochemical performance of oxygenreducing electroautotrophic biocathode

生物阴极的应用能够显著降低微生物电化学系统的成本并增强运行的稳定性,其中,环境温度是限制其性能提升的关键因素.因此,本研究通过对比温度对生物阴极和非生物阴极微生物燃料电池(MFCs)电化学性能的影响,证实了生物阴极对提升MFCs产电性能的重要作用.结果发现,生物阴极MFCs在35℃条件下的最大电压为0.70 V,是非生物阴极的1.3倍.原位三电极循环伏安特性测试显示生物阳极和生物阴极的最佳温度有所不同,并且温度对生物阳极的影响大于对生物阴极的影响.本研究表明了生物阴极对MFCs电化学性能提升的重要性,并且优化了电自养氧还原生物阴极的最佳运行温度,为推动其实际应用提供了温度设置的参考.

The application of biocathode could significantly reduce the cost of bioelectrochemical systems and enhance the stability of operation. The environmental temperature was the key factor limiting the performance improvement. This study confirmed the important role of biocathodes in improving the electricity generation of MFCs by comparing the effects of temperature on the electrochemical performance of biocathodes and abiotic microbial fuel cells(MFCs). The maximum voltage at 35 ℃ was 0.70 V,which was 1.3 times that of abiotic cathodes. The cyclic voltammetry tests showed that the optimal temperature of the bioanode and the biocathode were different,and the effect of temperature on the bioanode was more significant than that on the biocathode. This study showed the importance of biocathodes to improve the electrochemical performance of MFCs and optimized the optimal operating temperature of the oxygen-reducing electroautotrophic biocathode,which provided a reference for temperature setting to promote its practical application.