Coupling Nonstoichiometric Zn0.76Co0.24S with NiCo2S4Composite Nanoflowers for Efficient Synergistic Electrocatalytic Oxygen and Hydrogen Evolution Reactions

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dc.contributor.authorBiswas, Rathindranath
dc.contributor.authorThakur, Pooja
dc.contributor.authorAhmed, Imtiaz
dc.contributor.authorRom, Tanmay
dc.contributor.authorAli, Mir Sahidul
dc.contributor.authorPatil, Ranjit A.
dc.contributor.authorKumar, Bhupender
dc.contributor.authorSom, Shubham
dc.contributor.authorChopra, Deepak
dc.contributor.authorPaul, Avijit Kumar
dc.contributor.authorMa, Yuan-Ron
dc.contributor.authorHaldar, Krishna Kanta
dc.date.accessioned2024-01-21T10:33:05Z
dc.date.accessioned2024-08-13T11:16:18Z
dc.date.available2024-01-21T10:33:05Z
dc.date.available2024-08-13T11:16:18Z
dc.date.issued2022-12-15T00:00:00
dc.description.abstractTransition-metal sulfide-based composite nanomaterials have garnered extensive interest not only for their unique morphological architectures but also for exploring as a noble-metal-free cost-effective, durable, and highly stable catalyst for electrochemical water splitting. In this work, we synthesized in situ nonstoichiometric Zn0.76Co0.24S with NiCo2S4binary composite flowers (Zn0.76Co0.24S/NiCo2S4) in one step by thermal decomposition of Zn2[PDTC]4and Ni[PDTC]2complexes by a solvothermal process in a nonaqueous medium from their molecular precursor, and their potential application in electrochemical oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) was investigated. Field-emission scanning electron microscopy and transmission electron microscopy analyses revealed the flower-shaped morphology of as-synthesized Zn0.76Co0.24S/NiCo2S4. Again, the structural and chemical compositions were confirmed through powder X-ray diffraction and X-ray photoelectron spectroscopy studies, respectively. The as-obtained 3D flower-type Zn0.76Co0.24S/NiCo2S4nanostructure was further subject to electrochemical OER and HER in alkaline and acidic media, respectively. Zn0.76Co0.24S/NiCo2S4showed low overpotential values of 248 mV (Tafel slope, 85 mV dec-1) and 141 mV (Tafel slope, 79 mV dec-1) for OER and HER activities, respectively, due to the synergistic effects of Zn0.76Co0.24S and NiCo2S4. Several long-term stability tests also affirmed that the Zn0.76Co0.24S/NiCo2S4composite nanostructure is a highly stable and efficient electrocatalyst toward OER and HER activities as compared to the recently reported superior bifunctional electrocatalysts as well as state-of-the-art materials. � 2023 American Chemical Society. All rights reserved.en_US
dc.identifier.doi10.1021/acs.energyfuels.2c03384
dc.identifier.issn8870624
dc.identifier.urihttp://10.2.3.109/handle/32116/3262
dc.identifier.urlhttps://pubs.acs.org/doi/10.1021/acs.energyfuels.2c03384
dc.language.isoen_USen_US
dc.publisherAmerican Chemical Societyen_US
dc.subjectAlkalinityen_US
dc.subjectDecompositionen_US
dc.subjectElectrocatalystsen_US
dc.subjectField emission microscopesen_US
dc.subjectHigh resolution transmission electron microscopyen_US
dc.subjectHydrogenen_US
dc.subjectMolecular oxygenen_US
dc.subjectNanostructuresen_US
dc.subjectNickel compoundsen_US
dc.subjectPrecious metalsen_US
dc.subjectScanning electron microscopyen_US
dc.subjectSulfur compoundsen_US
dc.subjectSynthesis (chemical)en_US
dc.subjectX ray photoelectron spectroscopyen_US
dc.subjectZinc compoundsen_US
dc.subjectBinary compositesen_US
dc.subjectElectrocatalyticen_US
dc.subjectElectrochemical oxygenen_US
dc.subjectHighly stablesen_US
dc.subjectHydrogen evolution reaction activitiesen_US
dc.subjectHydrogen evolution reactionsen_US
dc.subjectNonstoichiometricen_US
dc.subjectSynthesiseden_US
dc.subjectTafel slopesen_US
dc.subjectTransition metal sulfidesen_US
dc.subjectCost effectivenessen_US
dc.titleCoupling Nonstoichiometric Zn0.76Co0.24S with NiCo2S4Composite Nanoflowers for Efficient Synergistic Electrocatalytic Oxygen and Hydrogen Evolution Reactionsen_US
dc.title.journalEnergy and Fuelsen_US
dc.typeArticleen_US
dc.type.accesstypeClosed Accessen_US

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