Respective electrode potential characteristics of photocatalytic fuel cell with visible-light responsive photoanode and air-breathing cathode
Respective electrode potential characteristics of photocatalytic fuel cell with visible-light responsive photoanode and air-breathing cathode
复制标题
可见光响应光阳极和呼吸式阴极光催化燃料电池各自的电极电位特性
DOI：
10.1016/j.ijhydene.2015.10.002
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发表时间：
2015-12-14
影响因子：
7.2
通讯作者：
Zhou, Yuecheng
中科院分区：
文献类型：
--
作者：
Liao, Qiang;Li, Lin;Zhou, Yuecheng
光催化燃料电池是一种很有前途的同时处理废水和发电的技术。为了更多地提高电池的性能，深入了解各自的光阳极和阴极性能是至关重要的。因此，在这项工作中，开发了一种具有可见光响应光阳极和空气呼吸阴极的高性能光催化燃料电池，以深入了解每个电极的电位特性。测量了不同操作参数下各电极的电势。实验结果表明，燃料浓度过低会严重限制光阳极的传质，过高的燃料浓度会导致电池的离子电导率降低，这两种情况都会影响电池的性能。因此，存在一个最佳的燃料浓度以获得最佳的电池性能。随着电解液浓度的增加，由于反应速率的提高和内阻的降低，光阳极和阴极的性能都得到了显著的改善，从而导致电池性能的提高。此外，研究还表明，光照强度对电池的光阳极电位有显著影响，增大光照强度有利于电池性能的提高。本文的研究结果为今后提高光催化燃料电池的性能提供了指导。版权所有(C)2015，氢能源出版有限责任公司。爱思唯尔有限公司出版。保留所有权利。
Photocatalytic fuel cell is a promising technology for simultaneous wastewater treatment and electricity generation. To more directionally improve the cell performance, a deep understanding of respective photoanode and cathode performances is of vital importance. In this work, therefore, a. high-performance photocatalytic fuel cell with a visible-light responsive photoanode and an air-breathing cathode was developed to gain insight into each electrode potential characteristics. The potentials of each electrode were measured under different operational parameters. Experimental results showed that too low fuel concentration led to a serious mass transfer limitation at the photoanode and too high fuel concentration led to a low ionic conductivity, both of which deteriorated the cell performance. Therefore, there existed an optimum fuel concentration to achieve the best cell performance. It was also shown that an increase in the electrolyte concentration markedly improved both the photoanode and cathode performances due to enhanced reaction rates and lowered internal resistance, thereby leading to the increased cell performance. In addition, it was demonstrated that the light intensity significantly affected the photoanode potential and increasing the light intensity boosted the cell performance. The results obtained in this work provide the guidance for improving the photocatalytic fuel cell performance in future applications. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.