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

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.available2024-01-21T10:33:05Z
dc.date.issued2022-12-15T00:00:00
dc.identifier.issn8870624
dc.identifier.urihttp://kr.cup.edu.in/handle/32116/3262
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.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.typeArticleen_US
dc.identifier.doi10.1021/acs.energyfuels.2c03384
dc.identifier.urlhttps://pubs.acs.org/doi/10.1021/acs.energyfuels.2c03384
dc.title.journalEnergy and Fuelsen_US
dc.type.accesstypeClosed Accessen_US


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