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| Type |
Oral Presentation |
| Area |
Oral Presentation of Young Scholars in Electrochemistry |
| Room No. |
406호 |
| Time |
THU 10:15-: |
| Code |
ELEC.O-6 |
| Subject |
Development of photo-assisted microbial electrolysis cells for the persistent hydrogen production |
| Authors |
전용원, 김성현1,*
건국대학교 생명공학과, Korea
1건국대학교 특성화학부생명공학과, Korea
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| Abstract |
A microbial electrolysis cell (MEC) is a device that converts organic matters to hydrogen with an additional external voltage input. Protons and electrons produced by microbes at the anode are transferred to the cathode and combined to molecular hydrogen. Since the hydrogen gas can be produced without a fermentation barrier and in an environmentally friendly way, an MEC has been regarded as an alternative to the conventional methods. Here we show that photo-assisted MECs could be developed using p-type semiconductors such as polyaniline nanofiber (PANInf) and CuO as cathodes under visible light illumination. We found that under 0.8 V external bias and light illumination in a single-chamber MEC, continuous hydrogen production from acetate were achieved at a rate of 1.78 and 1.84 m3 H2/m3d with negligible methane formation with PANInf and CuO, respectively. These values are favorably compared with that of Pt/C cathode that gives a rate of 2.17 m3 H2/m3d. These results are attributed to the p-type semiconductor characteristics of the materials where photoexcited electrons are used to reduce protons to hydrogen at the cathode surface and holes generated in the valence band are filled with electrons from acetate oxidation at the anode. This work can be extended to the microbial wastewater treatment for the hydrogen production. |
| E-mail |
jokakk@naver.com |
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119th General Meeting of the KCS