温度条件下光催化甲醇燃料电池的光电化学性质  

Photoelectrochemical properties of photocatalytic methanol fuel cells under different temperature conditions

作　　者：卜德刚 张宇[1] 洪梅[1] 王宝鑫[1] 宋溪明[1] BU Degang;ZHANG Yu;HONG Mei;WANG Baoxin;SONG Ximing(Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials,College of Chemistry,Liaoning University,Shenyang 110036,China)

机构地区：[1]辽宁大学化学院绿色合成与先进材料制备化学辽宁省重点实验室,辽宁沈阳110036

出　　处：《电子元件与材料》2021年第8期723-733,共11页Electronic Components And Materials

基　　金：2020年度辽宁大学本科教学改革研究项目(JG2020YBXM095)。

摘　　要：采用双室带有质子交换膜和石英窗的H型电池,以甲醇为燃料,构建了ZnO、BiVO_(4)、TiO_(2)和TiO_(2)/SrTiO_(3)四种光阳极材料的光催化甲醇燃料电池。通过体系在不同温度下的间歇运行,应用线性扫描伏安、交流阻抗、极化曲线等电化学方法探究了温度对光催化甲醇燃料电池性能的影响。在低温条件下,光催化燃料电池依然有较好的光电化学输出特性,5℃体系中,ZnO光阳极在光照下的短路电流密度和输出功率密度可达0.91 mA/cm^(2)和0.079 mW/cm^(2),分别是Pt电极的9倍和3倍,其性能高于利用Pt电极构建的质子交换膜燃料电池。此外,随着温度升高,阳极光催化活性逐渐增强,光电流密度提高,传荷阻抗降低,电池输出功率提高。研究结果表明,光催化甲醇燃料电池系统可以适应低温工作场景,在某些特殊环境具有应用价值。Photocatalytic methanol fuel cells were constructed by using a double-chamber H-type battery with a proton exchange membrane,a quartz window and four different photoanode materials,namely,ZnO,BiVO_(4),TiO_(2)and TiO_(2)/SrTiO_(3).The temperature effect on the performance of photocatalytic methanol fuel cell was investigated by electrochemical test methods,including linear sweep voltammetry,AC impedance and polarization curve test through the intermittent operation of the system at different temperatures.Under low temperature conditions,the photocatalytic fuel cells still have good photoelectrochemical output characteristics.In 5℃,the short-circuit current and output power of ZnO photoanode can reach 0.91 mA/cm^(2)and 0.079 mW/cm^(2)under illumination,which are 9 times and 3 times higher than that based on Pt anode,respectively.At higher temperature,the anode photocatalytic activity,the photocurrent density and the battery output power gradually improve,while the load transfer resistance decreases.The results show that the photocatalytic methanol fuel cell system can work under low temperature conditions and has application value in some special environments.

关 键 词：光催化 燃料电池 半导体材料 温度 光电化学性质 

分 类 号：O643.3[理学—物理化学]