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Flowable Nickel-Loaded Activated Carbon Cathodes for Hydrogen Production in Microbial Electrolysis Cells

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dc.contributor.authorMoreno-Jimenez, Daniel A.-
dc.contributor.authorKumaran, Yamini-
dc.contributor.authorEfstathiadis, Harry-
dc.contributor.authorHwang, Moon-Hyun-
dc.contributor.authorJeon, Byong-Hun-
dc.contributor.authorKim, Kyoung-Yeol-
dc.date.accessioned2023-11-24T04:51:02Z-
dc.date.available2023-11-24T04:51:02Z-
dc.date.created2023-08-29-
dc.date.issued2023-10-
dc.identifier.urihttps://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/192955-
dc.description.abstractMicrobial electrolysis cells (MECs) can electrochemically produce green hydrogen from waste streams. However, cathode materials have been a bottleneck for the practical application of MECs due to difficulties in scale-up and high costs. To overcome current drawbacks, we have examined a novel flowable cathode in MECs, where nickel-loaded activated carbon (Ni/AC) powders were suspended in a buffering solution as a cathode without electrode fabrication processes. The Ni/AC flow cathode with higher Ni content and minimum Ni/AC loading (4 Ni-atom% and 0.125 wt-AC.%, Ni4/AC0.125) demonstrated the highest catalytic activities (−0.86 V vs Ag/AgCl at −10 A/m2) among Ni/AC flow cathodes tested. This result indicates that pseudocapacitive behavior toward Faradaic reactions can be promoted by increasing Ni loadings on Ni/AC particles. The MEC with a Ni4/AC0.125 flow cathode produced comparable hydrogen production rates (1.62 ± 0.15 L-H2/Lreactor-day) to the Pt control (1.64 ± 0.09 L-H2/L-day) and 40% higher than the blank (only current collector without Ni/AC, 1.29 ± 0.02 L-H2/L-day) at a 4 h cycle. The impacts of carbon black blending remain unclear; there was a 10% increase in hydrogen production rates with the lowest carbon black content (0.06 wt %) in the Ni/AC flow cathode, but hydrogen production rates were not further improved as carbon black content increased.-
dc.language영어-
dc.language.isoen-
dc.publisherAMER CHEMICAL SOC-
dc.titleFlowable Nickel-Loaded Activated Carbon Cathodes for Hydrogen Production in Microbial Electrolysis Cells-
dc.typeArticle-
dc.contributor.affiliatedAuthorJeon, Byong-Hun-
dc.identifier.doi10.1021/acsestengg.3c00122-
dc.identifier.scopusid2-s2.0-85167922841-
dc.identifier.wosid001035686500001-
dc.identifier.bibliographicCitationACS ES&T ENGINEERING, v.3, no.10, pp.1476 - 1485-
dc.relation.isPartOfACS ES&T ENGINEERING-
dc.citation.titleACS ES&T ENGINEERING-
dc.citation.volume3-
dc.citation.number10-
dc.citation.startPage1476-
dc.citation.endPage1485-
dc.type.rimsART-
dc.type.docTypeArticle in press-
dc.description.journalClass1-
dc.description.isOpenAccessN-
dc.description.journalRegisteredClassscopus-
dc.relation.journalResearchAreaEngineering-
dc.relation.journalWebOfScienceCategoryEngineering, Environmental-
dc.subject.keywordPlusCAPACITIVE DEIONIZATION-
dc.subject.keywordPlusWASTE-WATER-
dc.subject.keywordPlusSUSPENSION ELECTRODES-
dc.subject.keywordPlusSLURRY ELECTRODES-
dc.subject.keywordPlusDESALINATION-
dc.subject.keywordPlusPERFORMANCE-
dc.subject.keywordPlusGENERATION-
dc.subject.keywordPlusCATHOLYTE-
dc.subject.keywordPlusEVOLUTION-
dc.subject.keywordPlusNITROGEN-
dc.subject.keywordAuthorActivated carbon flow electrode-
dc.subject.keywordAuthorWaste to energy-
dc.subject.keywordAuthorNonprecious metal catalysts-
dc.subject.keywordAuthorHydrogen evolution reaction-
dc.subject.keywordAuthorGreen hydrogen production-
dc.identifier.urlhttps://pubs.acs.org/doi/10.1021/acsestengg.3c00122-
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