The performance of spinel bulk-like oxygen-deficient CoGa2O4 as an air-cathode catalyst in microbial fuel cell

被引：35
作者：
Liu, Di [1 ,2 ,3 ]
Mo, Xiaoping [1 ,2 ,3 ]
Li, Kexun [1 ,2 ,3 ]
Liu, Yi [1 ,2 ,3 ]
Wang, Junjie [1 ,2 ,3 ]
Yang, Tingting [1 ,2 ,3 ]
机构：
[1] Nankai Univ, Coll Environm Sci & Engn, Tianjin 300071, Peoples R China
[2] Nankai Univ, MOE Key Lab Pollut Proc & Environm Criteria, Tianjin 300071, Peoples R China
[3] Tianjin Key Lab Environm Remediat & Pollut Contro, Tianjin, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2017年 / 359卷
关键词：
CoGa2O4; Spinel bulk-like structure; Oxygen vacancy; Oxygen reduction reaction; Microbial fuel cell; ROLLING ACTIVATED CARBON; REDUCED GRAPHENE OXIDE; REDUCTION REACTION; DIFFUSION LAYER; POWER-GENERATION; HYBRID; ELECTROCATALYST; PEROVSKITE; NANOSHEETS; CO3O4;
D O I：
10.1016/j.jpowsour.2017.05.080
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Nano spinel bulk-like CoGa2O4 prepared via a facile hydrothermal method is used as a high efficient electrochemical catalyst in activated carbon (AC) air-cathode microbial fuel cell (MFC). The maximum power density of the modified MFC is 1911 +/- 49 mW m(-2), 147% higher than the MFC of untreated AC cathode. Transmission electron microscope (TEM) and X-ray diffraction (XRD) exhibit the morphology and crystal structure of CoGa2O4. Rotating disk electrode (RDE) confirms the four-electron pathway at the cathode during the oxygen reduction reaction (ORR). Thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS) illustrate that the high rate oxygen vacancy exist in the CoGa2O4. The oxygen vacancy of CoGa2O4 plays an important role in catalytic activity. In a word, the prepared nano spinel bulk-like CoGa2O4 provides an alternative to the costly Pt in air-cathode for power output. (C) 2017 Published by Elsevier B.V.
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收藏
页码：355 / 362
页数：8
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