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Improved Microbial Electrolysis Cell Hydrogen Production by Hybridization with a TiO 2 Nanotube Array Photoanode

Author

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  • Ki Nam Kim

    (Department of Energy Science and Engineering, DGIST, 333 Techno Jungang-daero, Hyeonpung-myeon, Dalseong-gun, Daegu 42988, Korea
    These authors contributed equally to this work.)

  • Sung Hyun Lee

    (Department of Energy Science and Engineering, DGIST, 333 Techno Jungang-daero, Hyeonpung-myeon, Dalseong-gun, Daegu 42988, Korea
    These authors contributed equally to this work.)

  • Hwapyong Kim

    (Department of Energy Science and Engineering, DGIST, 333 Techno Jungang-daero, Hyeonpung-myeon, Dalseong-gun, Daegu 42988, Korea)

  • Young Ho Park

    (Department of Energy Science and Engineering, DGIST, 333 Techno Jungang-daero, Hyeonpung-myeon, Dalseong-gun, Daegu 42988, Korea)

  • Su-Il In

    (Department of Energy Science and Engineering, DGIST, 333 Techno Jungang-daero, Hyeonpung-myeon, Dalseong-gun, Daegu 42988, Korea)

Abstract

A microbial electrolysis cell (MEC) consumes the chemical energy of organic material producing, in turn, hydrogen. This study presents a new hybrid MEC design with improved performance. An external TiO 2 nanotube (TNT) array photoanode, fabricated by anodization of Ti foil, supplies photogenerated electrons to the MEC electrical circuit, significantly improving overall performance. The photogenerated electrons help to reduce electron depletion of the bioanode, and improve the proton reduction reaction at the cathode. Under simulated AM 1.5 illumination (100 mW cm −2 ) the 28 mL hybrid MEC exhibits a H 2 evolution rate of 1434.268 ± 114.174 mmol m −3 h −1 , a current density of 0.371 ± 0.000 mA cm −2 and power density of 1415.311 ± 23.937 mW m −2 , that are respectively 30.76%, 34.4%, and 26.0% higher than a MEC under dark condition.

Suggested Citation

  • Ki Nam Kim & Sung Hyun Lee & Hwapyong Kim & Young Ho Park & Su-Il In, 2018. "Improved Microbial Electrolysis Cell Hydrogen Production by Hybridization with a TiO 2 Nanotube Array Photoanode," Energies, MDPI, vol. 11(11), pages 1-13, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:3184-:d:183395
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    References listed on IDEAS

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    1. Gemma Reguera & Kevin D. McCarthy & Teena Mehta & Julie S. Nicoll & Mark T. Tuominen & Derek R. Lovley, 2005. "Extracellular electron transfer via microbial nanowires," Nature, Nature, vol. 435(7045), pages 1098-1101, June.
    2. Escapa, A. & Mateos, R. & Martínez, E.J. & Blanes, J., 2016. "Microbial electrolysis cells: An emerging technology for wastewater treatment and energy recovery. From laboratory to pilot plant and beyond," Renewable and Sustainable Energy Reviews, Elsevier, vol. 55(C), pages 942-956.
    3. Jafary, Tahereh & Daud, Wan Ramli Wan & Ghasemi, Mostafa & Kim, Byung Hong & Md Jahim, Jamaliah & Ismail, Manal & Lim, Swee Su, 2015. "Biocathode in microbial electrolysis cell; present status and future prospects," Renewable and Sustainable Energy Reviews, Elsevier, vol. 47(C), pages 23-33.
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    1. Pooja Dange & Soumya Pandit & Dipak Jadhav & Poojhaa Shanmugam & Piyush Kumar Gupta & Sanjay Kumar & Manu Kumar & Yung-Hun Yang & Shashi Kant Bhatia, 2021. "Recent Developments in Microbial Electrolysis Cell-Based Biohydrogen Production Utilizing Wastewater as a Feedstock," Sustainability, MDPI, vol. 13(16), pages 1-37, August.

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