Journal
JOURNAL OF POWER SOURCES
Volume 360, Issue -, Pages 172-179Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.06.012
Keywords
Enzyme cluster composite; Terephtalaldehyde (TPA); Two-step crosslinking; Porous structure; Bioelectrical device
Funding
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) of the Republic of Korea [20164030201060]
- Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea [20164030201060]
- Korea National Research Foundation (KNRF) of the Republic of Korea [2016M1A2A2937143]
- Ministry of Science, ICT and Future Planning (MSIP) of the Republic of Korea [2016M1A2A2937143]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20164030201060] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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An enzyme cluster composite (TPA/GOx) formed from glucose oxidase (GOx) and terephthalaldehyde (TPA) that is coated onto polyethyleneimine (PEI) and carbon nanotubes (CNTs) is suggested as a new catalyst ([(TPA/GOx)/PEI]/CNT). In this catalyst, TPA promotes inter-GOx links by crosslinking to form a large and porous structure, and the TPA/GOx composite is again crosslinked with PEI/CNT to increase the amount of immobilized GOx. Such a two-step crosslinking (i) increases electron transfer because of electron delocalization by pi conjugation and (ii) reduces GOx denaturation because of the formation of strong chemical bonds while its porosity facilitates mass transfer. With these features, an enzymatic biofuel cell (EBC) employing the new catalyst is fabricated and induces an excellent maximum power density (1.62 +/- 0.08 mW cm(-2)), while the catalytic activity of the RTPA/GOx)/PEI]/CNT catalyst is outstanding. This is clear evidence that the two-step crosslinking and porous structure caused by adoption of the TPA/GOx composite affect the performance enhancement of EBC. (C) 2017 Elsevier B.V. All rights reserved.
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