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Experimental investigations on morphology controlled bifunctional NiO nano-electrocatalysts for oxygen and hydrogen evolution

dc.contributor.authorManjunath, Vishesh
dc.contributor.authorBimli, Santosh
dc.contributor.authorBiswas, Rathindranath
dc.contributor.authorDidwal, Pravin N.
dc.contributor.authorHaldar, Krishna K.
dc.contributor.authorMahajan, Mangesh
dc.contributor.authorDeshpande, Nishad G.
dc.contributor.authorBhobe, Preeti A.
dc.contributor.authorDevan, Rupesh S.
dc.date.accessioned2024-01-21T10:33:03Z
dc.date.available2024-01-21T10:33:03Z
dc.date.issued2022-09-27T00:00:00
dc.identifier.issn3603199
dc.identifier.urihttp://kr.cup.edu.in/handle/32116/3254
dc.description.abstractDeveloping a single electrocatalyst effective for both oxygen and hydrogen evolution remains challenging. Although an attempt to utilize a single electrocatalyst for overall water splitting is made, there still exist several issues of efficiency and stability of the electrocatalyst. Hence, the present study reports on morphology-controlled NiO electrocatalyst, a single electrocatalyst for oxygen and hydrogen evolution. The cubic phase NiO nanoparticles and nanoplates of diameter and thickness <10 nm delivered surface-to-volume ratios of 0.078 and 0.083, respectively. XRD and TEM confirm the formation of NiO nanostructures, where morphology transformed independently of the chemical composition. XPS and EXAFS confirm the 2+ oxidation state of Ni ions and its octahedral coordination with oxygen. The 0D nanoparticles providing a larger surface area and active sites offered the overpotentials of 373 and 268 mV for OER and HER activity, respectively, and performed well than the 2D porous NiO nanoplates. The chronoamperometry and repetitive LSV cyclic studies confirmed the excellent long-term stability of 0D NiO nanoparticles in basic and acidic mediums during electrocatalytic water splitting reactions, owing to its increased electrochemically exposed active sites. � 2022 Hydrogen Energy Publications LLCen_US
dc.language.isoen_USen_US
dc.publisherElsevier Ltden_US
dc.subjectBifunctional NiOen_US
dc.subjectEXAFen_US
dc.subjectHRTEMen_US
dc.subjectSAXSen_US
dc.subjectWater splittingen_US
dc.subjectXPSen_US
dc.titleExperimental investigations on morphology controlled bifunctional NiO nano-electrocatalysts for oxygen and hydrogen evolutionen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.ijhydene.2022.09.054
dc.identifier.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0360319922041337
dc.title.journalInternational Journal of Hydrogen Energyen_US
dc.type.accesstypeClosed Accessen_US


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