Defatted spent coffee grounds-supported cobalt catalyst as a promising supercapacitor electrode for hydrogen production and energy storage

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dc.authoridAtelge, Muhamed Rasit/0000-0002-0613-2501
dc.authoridakdemir, Murat/0000-0001-9235-1913
dc.authoridAtabani, Abdulaziz/0000-0001-6793-5589
dc.contributor.authorKarakas, Duygu Elma
dc.contributor.authorAkdemir, Murat
dc.contributor.authorAtelge, M. R.
dc.contributor.authorKaya, Mustafa
dc.contributor.authorAtabani, A. E.
dc.date.accessioned2024-12-24T19:24:28Z
dc.date.available2024-12-24T19:24:28Z
dc.date.issued2023
dc.departmentSiirt Üniversitesi
dc.description.abstractThe effect of several parameters, such as different Co2+ ratios, burning temperatures, and burning times, was examined by using defatted spent coffee grounds (DSCG) as organic waste to obtain the most effective catalyst for producing hydrogen. Under optimum conditions, the most active catalyst/metal ratio was obtained by burning 50% Co (2+) at 400 degrees C for 90 min. To measure the time-dependent amounts of hydrogen, 0.1 g of DSCG-Co catalyst was dissolved in 10 mL of a methanol solution containing 0.25 g sodium borohydride (NaBH4) at 30 degrees C. The maximum hydrogen generation rate obtained from the methanolysis of NaBH4 at 30 and 60 degrees C was found to be 8749 and 17,283 mL min(-1) gcat(-1), respectively, and the activation energy of the catalyst was found to be 23.2 kJ mol(-1). FTIR, ICP-OES, XRD, BET, and SEM-EDX analyses were performed for the characterization of the prepared DSCG-Co-Cat catalyst. Furthermore, a supercapacitor cell was constructed by using this catalyst as an active substance for electricity storage. The specific capacitance of the electrode at the current density of 1 A/g was calculated as 67 F/g for two-electrode systems. The results of electrochemical analysis of the prepared supercapacitor were found to be similar to the ideal supercapacitor curves. The obtained capacitance values are at very good levels in terms of the capacity and cost factors. The results indicated that the multifunctional capacitor-catalyst material produced by Co-doped waste coffee could constitute an important element in a hybrid system that includes capacitor and catalyst systems that can be installed in the future. [GRAPHICS] .
dc.identifier.doi10.1007/s10098-021-02164-2
dc.identifier.endpage493
dc.identifier.issn1618-954X
dc.identifier.issn1618-9558
dc.identifier.issue2
dc.identifier.scopus2-s2.0-85111484068
dc.identifier.scopusqualityQ1
dc.identifier.startpage483
dc.identifier.urihttps://doi.org/10.1007/s10098-021-02164-2
dc.identifier.urihttps://hdl.handle.net/20.500.12604/6004
dc.identifier.volume25
dc.identifier.wosWOS:000678444800003
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofClean Technologies and Environmental Policy
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241222
dc.subjectDefatted spent coffee grounds
dc.subjectHydrogen
dc.subjectCatalyst
dc.subjectCapacitor-catalyst
dc.subjectSupercapacitor
dc.titleDefatted spent coffee grounds-supported cobalt catalyst as a promising supercapacitor electrode for hydrogen production and energy storage
dc.typeArticle

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