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Joo, Sang Hoon
Nanomaterials & Catalysis Lab
Research Interests
  • Catalyst, energy conversion, fuel cells, electrolyzer, ORR, HER, OER

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Membraneless enzymatic biofuel cells using iron and cobalt co-doped ordered mesoporous porphyrinic carbon based catalyst

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Title
Membraneless enzymatic biofuel cells using iron and cobalt co-doped ordered mesoporous porphyrinic carbon based catalyst
Author
Ji, JungyeonWoo, JinwooChung, YongjinJoo, Sang HoonKwon, Yongchai
Issue Date
2020-05
Publisher
ELSEVIER
Citation
APPLIED SURFACE SCIENCE, v.511
Abstract
Iron and cobalt co-doped ordered mesoporous porphyrinic carbon (FeCo-OMPC) is employed as the catalyst for both electrodes in membraneless enzymatic biofuel cells (EBCs). FeCo-OMPC is used for catalyzing oxygen redox reaction (ORR), while GOx/[FeCo-OMPC/CNT] is utilized as a catalyst for a series of glucose oxidation reaction (GOR) and hydrogen peroxide oxidation reaction (HPOR). The onset potential of the ORR by FeCo-OMPC is 0.31 V vs. Ag/AgCl, while that of HPOR by FeCo-OMPC/CNT and GOR-HPOR by GOx/[FeCo-OMPC/CNT] are both 0.12 V. The activity of this catalyst is better than previously reported similar catalysts due to the presence of Co species and high metal contents. As a result, the concentration of H2O2 generated by GOR is 1.02-1.56 mM when the same glucose concentration as human blood is used. In addition, the EBC using GOx/[FeCo-OMPC/CNT] and FeCO-OMPC shows the maximum power density of 21.3 +/- 2.97 mu W cm(-2) with open circuit voltage (OCV) of 0.17 +/- 0.016 V. These values are significantly higher than those of EBC using the competitive Fe-NI CNT catalyst (0.11 V and 9.6 mu W cm(-2)). Moreover, the OCV is close to the expected value by CV (0.19 V), confirming that the FeCo-OMPC catalyst can be used for implantable bioelectronics, such as biosensors and electroceuticals.
URI
https://scholarworks.unist.ac.kr/handle/201301/32062
URL
https://www.sciencedirect.com/science/article/pii/S0169433220302051
DOI
10.1016/j.apsusc.2020.145449
ISSN
0169-4332
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