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Synthesis of Ni-zeolitic imidazolate framework embedded with graphitic carbon as multifunctional composite catalyst for electrochemical water splitting and photocatalytic clofibric acid degradation performance

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dc.citedby0
dc.contributor.authorVijayakumar P.en_US
dc.contributor.authorNatesan K.en_US
dc.contributor.authorAthikesavan V.en_US
dc.contributor.authorKumaravel S.en_US
dc.contributor.authorRaja A.en_US
dc.contributor.authorKang M.en_US
dc.contributor.authorKrishnan P.S.en_US
dc.contributor.authorYusuf K.en_US
dc.contributor.authorid56742208000en_US
dc.contributor.authorid59309505700en_US
dc.contributor.authorid57201798505en_US
dc.contributor.authorid57212580936en_US
dc.contributor.authorid56806452200en_US
dc.contributor.authorid35201139000en_US
dc.contributor.authorid36053261400en_US
dc.contributor.authorid41662338900en_US
dc.date.accessioned2025-03-03T07:41:22Z
dc.date.available2025-03-03T07:41:22Z
dc.date.issued2024
dc.description.abstractHydrogen possesses the capacity to function as an alternative energy source for fuel, and electrochemical water splitting is a very efficient method of hydrogen generation by electrolyzing water. The efficient and stable electrocatalysts consisting of elements common in the Earth's crust are necessary. The present study involves the fabrication of graphitic carbon nitride (C3N4) sheets incorporating nickel-zeolite imidazolate framework (Ni-ZIF) heterostructure (denoted as Ni-ZIF/CN) using a hydrothermal method. The resulting heterostructure exhibits an exceptionally lesser overpotential of ?54.53 mV and 280 mV to reach a current density of 10 mA cm?2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. The Tafel slope for the HER and OER in alkaline (1 M KOH) electrolyte is measured to be 128 mV dec?1 and 101 mV dec?1, respectively. These results surpass the performance of previously reported Ni-ZIF electrocatalysts. Mechanistic investigations suggest that the nanocomposite electrode exhibits significant inherent catalytic activity, mostly attributed to improved conductivity, easy electron transport, and a high number of active sites. Furthermore, the nickel foam (NF) electrode covered with Ni-ZIF/CN-100 catalyst demonstrates exceptional electrochemical stability for a duration of 100 and 72 h for HER and OER, respectively, during the amperometric i-t test. A maximum level of photocatalytic degradation was attained on the Ni-ZIF/CN-100 catalyst, reaching a percentage of 97.31%. This percentage remained constant at 90.78% even after eight consecutive runs. The excellent activity of the synthesized photocatalyst is mainly attributed to the excellent electronic interaction of Ni-ZIF with C3N4, which enhances its charge transfer and reduces the charge carrier recombination phenomenon. This study can potentially broaden the range of economically viable photo/electrocatalysts for the processes of water splitting and photocatalysis. ? 2024 Hydrogen Energy Publications LLCen_US
dc.description.natureFinalen_US
dc.identifier.doi10.1016/j.ijhydene.2024.11.223
dc.identifier.epage509
dc.identifier.scopus2-s2.0-85209389971
dc.identifier.spage497
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85209389971&doi=10.1016%2fj.ijhydene.2024.11.223&partnerID=40&md5=0e67a87284ed32b6ee84780f3aae572e
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/36086
dc.identifier.volume95
dc.pagecount12
dc.publisherElsevier Ltden_US
dc.sourceScopus
dc.sourcetitleInternational Journal of Hydrogen Energy
dc.subjectAlkalinity
dc.subjectBioremediation
dc.subjectCarbon carbon composites
dc.subjectCoated wire electrodes
dc.subjectElectrolysis
dc.subjectElectrolytes
dc.subjectGraphitic Carbon Nitride
dc.subjectHydrogen evolution reaction
dc.subjectHydrothermal synthesis
dc.subjectOxygen evolution reaction
dc.subjectPhotocatalytic activity
dc.subjectPhotodegradation
dc.subjectPositive temperature coefficient
dc.subjectRate constants
dc.subjectClofibric acid
dc.subjectEvolution reactions
dc.subjectHigh stability
dc.subjectHydrogen evolution reaction and oxygen evolution reaction
dc.subjectHydrogen evolution reactions
dc.subjectImidazolate
dc.subjectNickel-zeolite
dc.subjectNickel-zeolite imidazolate framework
dc.subjectOxygen evolution
dc.subjectWater splitting
dc.subjectPotassium hydroxide
dc.titleSynthesis of Ni-zeolitic imidazolate framework embedded with graphitic carbon as multifunctional composite catalyst for electrochemical water splitting and photocatalytic clofibric acid degradation performanceen_US
dc.typeArticleen_US
dspace.entity.typePublication
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