Iron-streptomycin derived catalyst for efficient oxygen reduction reaction in ceramic microbial fuel cells operating with urine

JOURNAL OF POWER SOURCES

卷:425

Article

Garcia, Maria Jose Salar¹  Santoro, Carlo¹  Kodali, Mounika²  Serov, Alexey³  Artyushkova, Kateryna²  Atanassov, Plamen²  Ieropoulos, Ioannis¹ 

[1] UWE, Bristol BioEnergy Ctr, Bristol Robot Lab, T Block,Coldharbour Lane, Bristol BS16 1QY, Avon, England

[2] Univ New Mexico, Dept Chem & Biol Engn, Ctr Microengn Mat CMEM, Adv Mat Lab, 1001 Univ Blvd SE Suite 103,MSC 04 2790, Albuquerque, NM 87131 USA

[3] Pajarito Powder LLC, 3600 Osuna Rd NE Ste 309, Albuquerque, NM 87109 USA

关键词: Iron-based catalyst;    Oxygen reduction reaction;    Microbial fuel cells;    Bioenergy;   

DOI  :  10.1016/j.jpowsour.2019.03.052

来源: Elsevier

【 摘 要 】

In recent years, the microbial fuel cell (MFC) technology has drawn the attention of the scientific community due to its ability to produce clean energy and treat different types of waste at the same time. Often, expensive catalysts are required to facilitate the oxygen reduction reaction (ORR) and this hinders their large-scale commercialisation. In this work, a novel iron-based catalyst (Fe-STR) synthesised from iron salt and streptomycin as a nitrogen-rich organic precursor was chemically, morphologically and electrochemically studied. The kinetics of Fe-STR with and without being doped with carbon nanotubes (CNT) was initially screened through rotating disk electrode (RDE) analysis. Then, the catalysts were integrated into air-breathing cathodes and placed into ceramic-type MFCs continuously fed with human urine. The half-wave potential showed the following trend FeSTR > Fe-STR-CNT AC, indicating better kinetics towards ORR in the case of Fe-STR. In terms of MFC performance, the results showed that cathodes containing Fe-based catalyst outperformed AC-based cathodes after 3 months of operation. The long-term test reported that Fe-STR-based cathodes allow MFCs to reach a stable power output of 104.5 +/- 0.0 mu W cm(-2), 74% higher than AC-based cathodes (60.4 +/- 3.9 mu W cm(-2)). To the best of the Authors' knowledge, this power performance is the highest recorded from ceramic-type MFCs fed with human urine.

【 授权许可】

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