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IWAKURA, Chiaki; Nishioka, Masato; Tamura, Hideo

doi:10.1246/nikkashi.1982.1294

Cited by 3 publications

(2 citation statements)

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“…The estimated value of the order of OER is approximately 2. A similar order for OER was also reported in the literature, Iwakura et al [36] found second order with a higher value of the Tafel slope (110-115 mV decade -1 ) for NiFe 2 O 4 on Pt-substrate. However, Singh et al [32] found second order with a lower Tafel slope 45 mV d -1 on NiFe 2 O 4 on Ni support obtained by the thermal decomposition method, Orehotskey et al [36] also found the lower value of Tafel slope (37-47 mV decade -1 ) on nickel ferrites prepared by freeze-drying technique.…”

Section: Electrocatalytic Activitiessupporting

confidence: 84%

“…Orehotsky et al [34] observed an increase in room temperature saturation magnetization with nickel substitution in iron ferrite. Iwakura et al [35,36] also found an increase in saturation magnetization with metal substitution in the Fe 3 O 4 lattice. They also observed that electrocatalytic activity for oxygen evolution reaction increased with the increase in Bohr magneton.…”

Section: Electrocatalytic Activitiesmentioning

confidence: 91%

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Electrochemical Oxygen Evolution Reaction on NixFe3-xO4 (0 ≤ x ≤ 1.0) in Alkaline Medium at 25ºC

Chauhan

Lal

2022

J. Electrochem. Sci. Technol

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Spinel ferrites (Ni x Fe 3-x O 4 ; x = 0.25, 0.5, 0.75 and 1.0) have been prepared at 550ºC by egg white auto-combustion route using egg white at 550ºC and characterized by physicochemical (TGA, IR, XRD, and SEM) and electrochemical (CV and Tafel polarization) techniques. The presence of characteristic vibration peaks in FT-IR and reflection planes in XRD spectra confirmed the formation of spinel ferrites. The prepared oxides were transformed into oxide film on glassy carbon electrodes by coating oxide powder ink using the nafion solution and investigated their electrocatalytic performance for OER in an alkaline solution. The cyclic voltammograms of the oxide electrode did not show any redox peaks in oxygen overpotential regions. The iR-free Tafel polarization curves exhibited two Tafel slopes (b 1 = 59-90 mV decade -1 and b 2 = 92-124 mV decade -1 ) in lower and higher over potential regions, respectively. Ni-substitution in oxide matrix significantly improved the electrocatalytic activity for oxygen evolution reaction. Based on the current density for OER, the 0.75 mol Ni-substituted oxide electrode was found to be the most active electrode among the prepared oxides and showed the highest value of apparent current density (~9 mA cm -2 at 0.85 V) and lowest Tafel slope (59 mV decade -1 ). The OER on oxide electrodes occurred via the formation of chemisorbed intermediate on the active sites of the oxide electrode and follow the second-order mechanism.

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Section: Electrocatalytic Activitiessupporting

confidence: 84%

Section: Electrocatalytic Activitiesmentioning

confidence: 91%

Electrochemical Oxygen Evolution Reaction on NixFe3-xO4 (0 ≤ x ≤ 1.0) in Alkaline Medium at 25ºC

Chauhan

Lal

2022

J. Electrochem. Sci. Technol

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Water Splitting Using Electrochemical Approach

Yamaguchi

Takashima

Hashimoto

et al. 2016

Lecture Notes in Energy

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Inverse spinel NiFeAlO4 as a highly active oxygen evolution electrocatalyst: promotion of activity by a redox-inert metal ion

Chen

Miller

Gerken

et al. 2014

Energy Environ. Sci.

172

137

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Ni:Fe:Al mixed oxides were identified as highly active water oxidation electrocatalysts. A systematic investigation of these materials has led to the characterization of a well-defined NiFeAlO 4 inverse spinel catalyst. Electrochemical characterization of NiFeAlO 4 shows activity exceeding previously reported catalysts of similar composition and/or structure, including NiO, NiFe (9 : 1), and NiFe 2 O 4 .

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Cited by 3 publications

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Electrochemical Oxygen Evolution Reaction on NixFe3-xO4 (0 ≤ x ≤ 1.0) in Alkaline Medium at 25ºC

Electrochemical Oxygen Evolution Reaction on NixFe3-xO4 (0 ≤ x ≤ 1.0) in Alkaline Medium at 25ºC

Water Splitting Using Electrochemical Approach

Inverse spinel NiFeAlO4 as a highly active oxygen evolution electrocatalyst: promotion of activity by a redox-inert metal ion

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