Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 46, Issue 20, Pages 11345-11356Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.04.059
Keywords
Microbial electrolysis cells; Proton exchange membrane; Silver nanoparticle; Polydopamine; Anti-biofouling; Biofilm
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Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2019R1A2C1006356]
- Korea Environment Industry & Technology Institute (KEITI) through Industrial Facilities & Infrastructure Research Program - Korea Ministry of Environment (MOE) [146834]
- Korea Environmental Industry & Technology Institute (KEITI) [ARQ146831004] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The study demonstrates that the combined use of PDA and AgNP shows significantly higher MEC performance compared to single coating. When AgNPs were coated immediately after the PDA coating, they were more uniformly formed and less released, with proton transportability not sacrificed, resulting in a biofouling reduction of 80.74% compared to pristine PEM.
Proton exchange membrane (PEM) fouling in microbial electrolysis cells (MECs) is a major drawback since it limits proton migration. To mitigate membrane fouling, the typical strategy was surface coating with silver nanoparticles (AgNP) as sterilizing agents, but adverse silver release and interference on proton transfer are intrinsic constraint. In this study, to ameliorate these disadvantages the PEM was coated with AgNP and polydopamin (PDA), individually and in combination or even in different coating order, to study synergetic effects of these modifications. Combined use of PDA and AgNP showed a significantly higher MEC performance than a single coating (H2 recovery after 6 month operation; PDA_Ag = 68.12%, PDA-only = 16.1%, Ag-only = 5.69% and pristine = 3.21%). In terms of coating order, when AgNPs were coated immediately after the PDA coating, AgNPs were more uniformly formed and less released, and proton transportability (t+ = 0.96) was not sacrificed, showing a biofouling reduction of 80.74% compared to pristine PEM. (c) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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