Journal
JOURNAL OF POWER SOURCES
Volume 272, Issue -, Pages 320-327Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.08.058
Keywords
Binuclear-cobalt-phthalocyanine; Metal oxide; Oxygen reduction reaction; Microbial fuel cell; X-ray photoelectron spectroscopy
Funding
- National Natural Science Foundation of China [21173086, 20975040]
- Guangdong Natural Science Foundation [10351064101000000]
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A novel hybrid binuclear-cobalt-phthalocyanine (Bi-CoPc) is developed as the cathode catalyst to replace the costly platinum (Pt) in single chamber microbial fuel cells (SCMFCs). Bi-CoPc/C is integrated with metal oxides (NiO and COO) to form macrocyclic complex for enhanced oxygen reduction rate (ORR). The characteristics of hybrid catalysts (Bi-CoPc/C-CoO and Bi-CoPc/C-NiO) are compared with Co-contained catalysts (CoPc/C and Bi-CoPc/C) and metal oxide catalysts (NiO and CoO). The increase in O and N functional groups indicates the benefits of NiO and CoO to the cathode catalysts. The cyclic voltammetry (CV) shows the reduction peak for Bi-CoPc/C-NiO and Bi-CoPc/C-CoO at -0.12 V and -0.22 V, respectively. The power densities (368 mW m(-2) and 400 mW m(-2)) of SCMFCs with Bi-CoPc/C-CoO and Bi-CoPc-NiO/C are the highest among the cathodes tested, and close to that of Pt (450 mW m(-2)). This study demonstrates that hybrid Bi-CoPc/C with metal oxides has a great potential as a cost-effective catalyst in MFCs. (C) 2014 Elsevier B.V. All rights reserved.
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