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发布时间：2019-03-09

论文类型：期刊论文

发表时间：2016-01-01

发表刊物：JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS

收录刊物：EI、SCIE

卷号：58

页面范围：374-380

ISSN号：1876-1070

关键字：Graphene; Prussian blue; Microbial fuel cell; Oxygen reduction reaction; Tafel equation

摘要：Prussian blue/graphene (PB/GE) nanocomposite was successfully synthesized and the oxygen reduction reaction (ORR) activities were studied in our previous work. In this study the PB/GE nanocomposite and PB were deposited on the surface of active carbon particles, and the resulted particles were placed in two microbial fuel cells (MFC) as the three-dimensional cathode electrodes for oxygen reduction. The two MFCs were labeled as PB/GE-MFC and PB-MFC, and their performances were evaluated in the long term operation. A series of characterization methods showed the successful deposition of PB/GE and PB on the particles. After the long term operation, the cell voltage and maximum power density of PB-MFC decreased sharply, which dropped from 530 mV and 15.63 W/m(-3) to 395 mV and 7.5 W/m(-3), while those of PB/GE-MFC were decreased slightly, which dropped from 530 mV and 16.26 W/m(-3) to 470 mV and 15.88 W/m(-3). The Tafel constants showed that PB/GE-MFC cathode had higher kinetic activity and faster reactions than PB-MFC cathode. PB/GE had stable performance in the MFC during the long term operation, and it can be used as a novel cathode as an effective alternative to platinum for oxygen reduction in MFC. (C) 2015 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.