Effective and environmentally friendly Co nanocatalyst on sodium borohydride hydrolysis in different solvents

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dc.contributor.authorErhan Onat
dc.contributor.authorSelma Ekinci
dc.contributor.authorÖmer Şahin
dc.contributor.authorMehmet Sait İzgi
dc.date.accessioned2025-01-27T10:30:57Z
dc.date.available2025-01-27T10:30:57Z
dc.date.issued2025-01
dc.departmentFakülteler, Mühendislik Fakültesi, Kimya Mühendisliği Bölümü
dc.description.abstractThis study investigates the development and performance of a cobalt (Co) nanocatalyst supported by carbon quantum dots (CQDs) for hydrogen production via sodium borohydride (NaBH₄) hydrolysis. The CQDs were synthesized using a hydrothermal method from caffeine and subsequently used to support the cobalt catalyst. The structure and properties of the synthesized catalyst were characterized using techniques such as X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and energy dispersive spectroscopy (EDX). The catalytic performance was evaluated in various solvents, with the highest hydrogen production rate observed in ethanol. The optimal conditions for Co@CQDs catalyst synthesis were identified as an 8-h hydrothermal treatment with a 3 mmol metal loading. The catalyst demonstrated excellent reusability, maintaining 100% hydrogen production efficiency after seven cycles. The activation energy for the hydrolysis reaction was found to be lower for catalysts synthesized in ethanol (25.48 kJ mol−1) compared to those synthesized in water (35.57 kJ mol−1), indicating enhanced catalytic activity. Under optimum conditions, the hydrolysis reaction in the presence of Co@CQDs (water) catalyst produced 23753 mL min−1 g−1 of hydrogen, while the hydrolysis reaction in the presence of Co@CQDs (ethanol) catalyst produced 28751 mL min−1 g−1. This study highlights the potential of CQDs-supported Co nanocatalysts for efficient and sustainable hydrogen production.
dc.identifier.citationOnat, E., Ekinci, S., Şahin, Ö., & İzgi, M. S. (2025). Effective and environmentally friendly Co nanocatalyst on sodium borohydride hydrolysis in different solvents. International Journal of Hydrogen Energy.
dc.identifier.doi10.1016/j.ijhydene.2025.01.073
dc.identifier.issn0360-3199
dc.identifier.scopus2-s2.0-85214792832
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.ijhydene.2025.01.073
dc.identifier.urihttps://hdl.handle.net/20.500.12604/8468
dc.indekslendigikaynakScopus
dc.institutionauthorİzgi, Mehmet Sait
dc.institutionauthorid0000-0003-3685-3219
dc.publisherElsevier BV
dc.relation.ispartofInternational Journal of Hydrogen Energy
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectCaffeine
dc.subjectCarbon quantum dots
dc.subjectGreen synthesis
dc.subjectSodium borohydride
dc.titleEffective and environmentally friendly Co nanocatalyst on sodium borohydride hydrolysis in different solvents
dc.typejournal-article

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