Metal-free catalysts with phosphorus and oxygen doped on carbon-based on Chlorella Vulgaris microalgae for hydrogen generation via sodium borohydride methanolysis reaction

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dc.authoridSAKA, Cafer/0000-0003-2534-5921
dc.contributor.authorSaka, Cafer
dc.date.accessioned2024-12-24T19:27:15Z
dc.date.available2024-12-24T19:27:15Z
dc.date.issued2021
dc.departmentSiirt Üniversitesi
dc.description.abstractMetal-free catalysts (C-KOH-P) containing phosphorus (P) and oxygen (O) prepared by the modification with phosphoric acid (H3PO4) of activated carbon (C-KOH) obtained by activation of Chlorella Vulgaris microalgae with potassium hydroxide (KOH) were investigated for the hydrogen (H-2) generation reaction from methanolysis of sodium borohydride (NaBH4). Elemental analysis, XRD, FTIR, ICP-MS, and nitrogen adsorption were used to analyze the characteristics of metal-free catalysts. The results showed that groups containing 0 and P were attached to the carbon sample. In the study, the hydrogen production rates (HGR) obtained with metal-free C-KOH and C-KOH-P catalysts were 3250 and 10,263 mL/min/g, respectively. These HGR values are better than most values obtained for many catalysts presented in the literature. Besides, relatively low activation energy (Ea) of 27.9 kJ/mol was obtained for this metal-free catalyst. The C-KOH-P metal-free catalyst showed ideal reusability with 100% conversion and a partial reduction in the H-2 production studies of NaBH4 methanolysis after five consecutive uses. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.ijhydene.2020.09.220
dc.identifier.endpage5157
dc.identifier.issn0360-3199
dc.identifier.issn1879-3487
dc.identifier.issue7
dc.identifier.scopus2-s2.0-85098651170
dc.identifier.scopusqualityQ1
dc.identifier.startpage5150
dc.identifier.urihttps://doi.org/10.1016/j.ijhydene.2020.09.220
dc.identifier.urihttps://hdl.handle.net/20.500.12604/6563
dc.identifier.volume46
dc.identifier.wosWOS:000608676300003
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofInternational Journal of Hydrogen Energy
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241222
dc.subjectPhosphorus
dc.subjectOxygen
dc.subjectMicroalgae
dc.subjectMetal-free
dc.subjectHydrogen
dc.subjectMethanolysis
dc.titleMetal-free catalysts with phosphorus and oxygen doped on carbon-based on Chlorella Vulgaris microalgae for hydrogen generation via sodium borohydride methanolysis reaction
dc.typeArticle

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