微生物燃料电池La07Sr03CoO3/PANI阴极催化剂的制备及其应用

白立俊， 王许云*， 郭庆杰

（青岛科技大学 化工学院；清洁化工过程山东省高校重点实验室，山东 青岛 266042）

摘要： 采用溶胶凝胶法和原位复合技术分别制备LaxSr1-xCoO3和La07Sr03CoO3/PANI复合材料阴极催化剂。通过X射线衍射(XRD)和扫描电子显微镜(SEM)对所制备催化剂进行微观结构和表面形貌的表征。采用循环伏安法（CV）对其电催化活性进行了系统研究。实验结果表明，锶掺杂量的差异导致催化剂的活性有较大区别，在磷酸盐缓冲溶液中La07Sr03CoO3/PANI催化剂表现出了良好的活性。将所制备催化剂应用于厌氧流化床微生物燃料电池（AFBMFC）阴极，结果显示，La07Sr03CoO3/PANI复合材料作阴极催化剂，其AFBMFC的最大功率密度12281 mW·m-2是La07Sr03CoO3催化剂微生物燃料电池(MFC)的12倍，相应开路电压达651 mV。表明La07Sr03CoO3/PANI催化剂具有显著的催化活性，可作为MFC新型的阴极催化剂。

关键词： La07Sr03CoO3/PANI； 微生物燃料电池； 空气阴极； 催化剂； 产电特性

中图分类号： O 646；X 382；X 703              文献标志码： A

Preparation and Characteristics of La07Sr03CoO3/PANI as Cathode Catalysts for Microbial Fuel Cell

BAI Lijun, WANG Xuyun, GUO Qingjie

（College of Chemical Engineering; Key Laboratory of Clean Chemical Processing of Shandong Province, Qingdao University of Science and Technology, Qingdao 266042, China）

Abstract: LaxSr1-xCoO3 (x=05, 07, 08) perovskite catalysts and La07Sr03CoO3/PANI composites were synthesized by the solgel citrate method and polymerization method respectively. The electrochemical characteristics of oxygen reduction reaction (ORR) were systematically compared by cyclic voltammetry (CV). The results demonstrate that, La07Sr03CoO3/PANI catalyst can catalyze ORR in phosphate buffered solution with quite good activity. The performance of the prepared LaxSr1-xCoO3 catalysts and La07Sr03CoO3/PANI composites applied for cathode catalysts of anaerobic fluidized bed microbial fuel cell (AFBMFC) was examined. The results show that, the maximum power of AFBMFC operated with La07Sr03CoO3/PANI cathode catalysts was 12281 mW·m-2, which was 20% higher than AFBMFC with La07Sr03CoO3 catalysts. The open circuit voltage was up to 651 mV. The results demonstrate that the La07Sr03CoO3/PANI catalysts have high electrocatalytic activity and probably provide a new solution for finding effective cathode materials for MFC.

Key words: La07Sr03CoO3/PANI; microbial fuel cell; air cathode; catalyst; electricity production characteristics

收稿日期： 20131017

基金项目： 国家自然科学基金项目(21276129);教育部博士点专项基金项目(20103719120004)；山东省高等学校科研计划项目(J11LB62).

作者简介： 白立俊(1988—)，女，硕士研究生.         *通信联系人.