Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 45, Issue 48, Pages 25985-25995Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.01.053
Keywords
Reduced graphene oxide; Ceria nanoparticles; Photocatalyst; Microbial electrolysis cell; H-2 production; COD reduction
Categories
Funding
- Science and Engineering Research Board
- Ministry of Human Resource Development, Delhi (India) [SERB-IMPRINT/2018/000252]
- Department of Science and Technology, Delhi (India) [DST/INSPIRE/04/2015/001869]
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A phenolic precursor-based carbon film dispersed with cerium oxide (CeO2) and reduced graphene oxide (rGO) is prepared as the electrodes of a microbial electrolysis cell (MEC) for simultaneous hydrogen (H-2) production and reduction of chemical oxygen demand (COD) in wastewater under visible light irradiation. The oxides are in situ dispersed in the polymerization reaction mixture during the synthesis stage of the phenolic film. The maximum Coulombic energy efficiency, overall H-2 recovery and cathodic recovery of the CeO2-rGO/carbon film-based MEC are measured to be approximately 95, 93 and 98%, respectively at 1 V (Ag/ AgCl), whereas COD reduction in the wastewater is measured to be approximately 95%. The improved hydrogen evolution and organic degradation are attributed to the electroconductive graphitic rGO and photocatalytic CeO2, respectively. The metal oxide-rGO-dispersed carbon nanocomposite film-based MEC provides an efficient means for simultaneously producing H-2 and treating the organics-laden wastewater. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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