Journal
DALTON TRANSACTIONS
Volume 47, Issue 5, Pages 1442-1450Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7dt04063f
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Funding
- Natural Science Foundations of China [21576056, 21576057]
- Guangdong Natural Science Foundation [2015A030313503, 2017A030311016]
- Science and Technology Research Project of Guangdong Province [2016A010103043]
- Featured Innovation Project of Guangdong University [2016KTSCX107]
- Science and Technology Research Project of Guangzhou [201607010232, 201607010198, 201607010263]
- Guangzhou University's Training Program for Young Top-Notch Personnel [BJ201704]
- High Level University Construction Project (Regional Water Environment Safety and Water Ecological Protection)
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The sluggish kinetic rate-limiting oxygen reduction reaction (ORR) at the cathode remains the foremost issue hindering the commercialization of microbial fuel cells (MFCs). Utilization of the effect of micro-molecule conjugation and the synergistic effect between Pd nanoparticles and N-rGO (nitrogen-doped reduced graphene oxide) to stabilize a precious metal onto carbon materials is a promising strategy to design and synthesize highly efficient cathode catalysts. In this study, gallic acid is used to facilitate the coupling of palladium (Pd) with N-rGO to form GN@Pd-GA via a simple hydrothermal process. Notably, the as-synthesized GN@Pd-GA as a cathode catalyst shows an approximately direct four-electron feature and demonstrates a high ORR performance in 0.1 M KOH. Furthermore, the stability and methanol tolerance of GN@Pd-GA are superior to those of the commercial Pt/C catalysts. In addition, a maximum power density of 391.06 +/- 0.2 mW m(-2) of MFCs equipped with GN@Pd-GA was obtained, which was 96.2% of the power density of MFCs equipped with a commercial Pt/C catalyst.
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