Carbon‐supported perovskite oxides as oxygen reduction reaction catalyst in single chambered microbial fuel cells
Carbon‐supported perovskite oxides as oxygen reduction reaction catalyst in single chambered microbial fuel cells
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DOI：
10.1002/jctb.3893
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发表时间：
2013-05
影响因子：
3.4
通讯作者：
Heng Dong;Hongbing Yu;Xin Wang;Qixing Zhou;Jingwen Sun
中科院分区：
文献类型：
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作者：
Heng Dong;Hongbing Yu;Xin Wang;Qixing Zhou;Jingwen Sun
背景：微生物燃料电池需要无铂阴极催化剂。钙钛矿型氧化物在化学燃料电池中被证明是一种高活性、低成本的氧还原催化剂，可以作为Pt的替代物。研究结果：制备了碳载体上的纳米尺寸的La0.4Ca0.6Co0.9Fe0.1O3钙钛矿型氧化物（LCCF/C），并测试了其在MFC中的性能和稳定性（15次循环）。用新鲜的LCCF/C阴极获得了7.030 × 10−5（A cm−2）的交换电流密度，并且在MFC中运行15个循环后增加到7.438 × 10−5（A cm−2）。LCCF/C阴极在第二次循环时获得了405 mW m−2的功率密度，介于Pt/C（560 mW m−2）和C（339 mW m−2）阴极之间。在第15次循环结束时，与Pt/C（4%，17%）和C（22%，69%）阴极相比，LCCF/C阴极的开路电压（2%）和最大功率密度（15%）上的最低衰减（由于生物污染）速率被观察到。结论：本研究表明，钙钛矿型碳载氧化物催化剂可能是一个潜在的替代铂的阴极氧还原反应（ORR）在空气阴极MFC。© 2012化学工业协会
BACKGROUND: Pt-free cathodic catalyst is needed for microbial fuel cells (MFCs). Perovskite-type oxide could be a substitute for Pt because it has been proved to be a highly active and low-cost oxygen reduction catalyst in chemical fuel cells. RESULTS: A nano-sized La0.4Ca0.6Co0.9Fe0.1O3 perovskite-type oxide on a carbon support (LCCF/C) was prepared and tested for its performance and stability (15 cycles) in MFCs. An exchange current density of 7.030 × 10−5 (A cm−2) was obtained with fresh LCCF/C cathode and is increased to 7.438 × 10−5 (A cm−2) after 15 cycles operating in MFCs. A power density of 405 mW m−2 was achieved with the LCCF/C cathode at the 2nd cycle which was between those of Pt/C (560 mW m−2) and C (339 mW m−2) cathodes. At the end of the 15th cycle, the lowest decay (due to biofouling) rate on the open circuit voltage (2%) and the maximum power density (15%) were observed with LCCF/C cathode compared with those of Pt/C (4%, 17%) and C (22%, 69%) cathodes, respectively. CONCLUSIONS: This study demonstrated that perovskite-type oxide on carbon support catalysts could be a potential substitute for Pt for cathodic oxygen reduction reaction (ORR) in air-cathode MFCs. © 2012 Society of Chemical Industry