Improved Microbial Electrolysis Cell Hydrogen Production by Hybridization with a TiO2 Nanotube Array Photoanode
Open Access
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 TiO2 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 H2 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.Keywords
Funding Information
- National Research Foundation of Korea (2015M1A2A2074670)
This publication has 76 references indexed in Scilit:
- Hydrogen production from inexhaustible supplies of fresh and salt water using microbial reverse-electrodialysis electrolysis cellsProceedings of the National Academy of Sciences, 2011
- Microbial solar cells: applying photosynthetic and electrochemically active organismsTrends in Biotechnology, 2011
- Effects of flow-rate, inoculum and time on the internal resistance of microbial fuel cellsBioresource Technology, 2010
- Stabilizing climate requires near‐zero emissionsGeophysical Research Letters, 2008
- Sustainable and efficient biohydrogen production via electrohydrogenesisProceedings of the National Academy of Sciences, 2007
- A New Benchmark for TiO2 Nanotube Array Growth by AnodizationThe Journal of Physical Chemistry C, 2007
- Electrically conductive bacterial nanowires produced by Shewanella oneidensis strain MR-1 and other microorganismsProceedings of the National Academy of Sciences, 2006
- Crystallization and high-temperature structural stability of titanium oxide nanotube arraysJournal of Materials Research, 2003
- The Non-Thickness-Limited Growth of Anodic Oxide Films on Valve MetalsElectrochemical and Solid-State Letters, 1999
- Effect of Structure on Electron Transfer Reactions between Anthracene Dyes and TiO2 NanoparticlesThe Journal of Physical Chemistry B, 1998