Influence of zinc doping on structural, electrical, magnetic and electrochemical properties of nickel ferrite system synthesized from succinato-hydrazinate precursors

Costa, Seneca O.; Verenkar, V. M. S.

doi:10.1007/s10854-022-09266-7

Cited by 2 publications

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“…The Zn content had an impact on the size of the grain and also on the agglomeration of particles. The grain size of the particles was found to increase slightly with the increase in Zn content, which could be attributed to the larger radius of Zn compared to Ni . This could decrease the resistivity as the content of grain boundaries was reduced, which acts as a barrier to electron flow .…”

Section: Resultsmentioning

confidence: 99%

“…The grain size of the particles was found to increase slightly with the increase in Zn content, which could be attributed to the larger radius of Zn compared to Ni. 25 This could decrease the resistivity as the content of grain boundaries was reduced, which acts as a barrier to electron flow. 26 In lower zinc content samples, the grains were formed by the magnetostatic interaction of nanocrystallites, leading to agglomeration in these samples.…”

Section: Electrochemical Measurementmentioning

confidence: 99%

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Unraveling the Electrocatalytic Response of Zn-Substituted Nickel Ferrite for Overall Water Splitting

Khan,

Rahman,

Chae

et al. 2024

ACS Appl. Energy Mater.

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Nickel ferrites (NiFe 2 O 4 ) having rich redox chemistry are regarded as proficient electrocatalysts for sustainable and renewable energy applications. However, its entire potential as an electrode material is limited by its weak structural characteristics and inadequate charge transport qualities. This work reports a series of zinc-substituted inverse spinel ferrites (Zn x Ni 1−x Fe 2 O 4 ) synthesized by a simple and environmentally benign hydrothermal method as electrocatalysts for overall water splitting. The surface morphology, structural elements, and electronic properties of resultant materials are significantly changed by Zn inclusion. Among different compositions, the ferrite sample Zn 0.5 Ni 0.5 Fe 2 O 4 showed outstanding water splitting performances, with a current density of 100 mA•cm −2 for OER and HER at the cost of 290 mV and 311 mV overpotentials, respectively. The electrode demonstrated lower Tafel slopes of 56 and 46 mV•dec −1 for HER and OER with a high turnover frequency (TOF) and exchange current density (j 0 ). Significantly, this electrode demanded a cell voltage of 1.48 V in a two-electrode electrolyzer to deliver 10 mA•cm −2 and showed good stability for 24 h. This is attributed to the efficient charge transport properties of the Zn-incorporated NiFe 2 O 4 with high electrical conductivity and charge transfer characteristics. Overall, the findings highlighted the potential of Zn-incorporated NiFe 2 O 4 as a promising electrocatalyst for renewable hydrogen production.

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Section: Resultsmentioning

confidence: 99%

Section: Electrochemical Measurementmentioning

confidence: 99%