Nanosized (Ni1−xZnx)Fe2O4for water oxidation

Mehrabani, Somayeh; Singh, Jitendra Pal; Bagheri, Robabeh; Wattoo, Abdul Ghafar; Song, Zhenlun; Chae, Keun Hwa; Najafpour, Mohammad Mahdi

doi:10.1039/c8na00200b

Cited by 5 publications

(3 citation statements)

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“…For all samples calcined at 275°C, a prominent double peak at 1600-1400 cm À 1 is present in the DRIFT spectra indicating carbonate anions ( Figure S1). [43,46,47] When calcining these samples at 400°C or above, no IR bands belonging to carbonate anion vibrations are present anymore, which is in agreement with the results from TG-MS analysis. Additionally, at calcination temper-ature 400°C or higher an IR signal at 3699 cm À 1 is detectable and can be attributed to OÀ H vibrations of isolated OÀ H groups on metal oxide surfaces.…”

Section: Resultssupporting

confidence: 87%

“…PXRD patterns of samples calcined at 275 °C show no reflections indicating crystalline phases (dotted line, Figure 2a). For all samples calcined at 275 °C, a prominent double peak at 1600–1400 cm −1 is present in the DRIFT spectra indicating carbonate anions (Figure S1) [43,46,47] . When calcining these samples at 400 °C or above, no IR bands belonging to carbonate anion vibrations are present anymore, which is in agreement with the results from TG‐MS analysis.…”

Section: Resultssupporting

confidence: 85%

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Mesoporous NiFe₂O₄ with Tunable Pore Morphology for Electrocatalytic Water Oxidation

et al. 2021

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Mesoporous NiFe2O4 for electrocatalytic water splitting was prepared via soft‐templating using citric‐acid‐complexed metal nitrates as precursors. The mesopore evolution during thermal treatment was examined systematically giving insights into the formation process of mesoporous NiFe2O4. Detailed nitrogen physisorption analysis including desorption scanning experiments reveal the presence of highly accessible mesopores generating surface areas of up to 200 m2/g. The ability of the NiFe2O4 powders to perform electrocatalytic oxygen evolution reaction under alkaline conditions was investigated, highlighting the advantages of mesopore insertion. The most active samples reach a current density of 10 mA cm−2 at an overpotential of 410 mV with a small Tafel slope of 50 mV dec−1, indicating an enhanced activity that originated from the increased catalyst surface.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 85%

Mesoporous NiFe₂O₄ with Tunable Pore Morphology for Electrocatalytic Water Oxidation

et al. 2021

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“…8. As the research on OER by Ni/Fe oxides are focused on the electrochemical issues [32][33][34][35][36][37][38] , these chemical experiments could be a road map to new findings.…”

Section: Oer Of K 2 Feo 4 and Nimentioning

confidence: 99%

Oxygen-evolution reaction by nickel/nickel oxide interface in the presence of ferrate(VI)

Akbari

Bagheri

Song

et al. 2020

Sci Rep

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In this study, we investigate the effect of K 2 feo 4 , as a new and soluble fe salt at alkaline conditions, on oxygen-evolution reaction (oeR) of ni oxide. Both oxidation and reduction peaks for ni in the presence and absence of fe are linearly changed by (scan rate) 1/2. immediately after the interaction of [feo 4 ] 2with the surface of the electrode, a significant increase in OER is observed. This could be indicative of the fact that either the [feo 4 ] 2on the surface of ni oxide is directly involved in oeR, or, it is important to activate Ni oxide toward OER. Due to the change in the Ni(II)/(III) peak, it is hypothesized that Fe impurity in KOH or electrochemical cell has different effects at the potential range. At low potential, [FeO 4 ] 2− is reduced on the surface of the electrode, and thus, is significantly adsorbed on the electrode. Finally, oxygenevolution measurements of K 2 feo 4 and ni 2 o 3 are investigated under chemical conditions. K 2 feo 4 is not stable in the presence of Ni(II) oxide, and OER is observed in a KOH solution (pH ≈ 13).

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Structural changes of a NiFe-based metal-organic framework during the oxygen-evolution reaction under alkaline conditions

Salmanion

Najafpour

2021

International Journal of Hydrogen Energy

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Nanosized (Ni_1−xZn_x)Fe₂O₄for water oxidation

Abstract: Nanosized (Ni1−xZnx)Fe2O4 is a good catalyst for water oxidation under alkaline conditions.

Cited by 5 publications

References 50 publications

Mesoporous NiFe₂O₄ with Tunable Pore Morphology for Electrocatalytic Water Oxidation

Mesoporous NiFe₂O₄ with Tunable Pore Morphology for Electrocatalytic Water Oxidation

Oxygen-evolution reaction by nickel/nickel oxide interface in the presence of ferrate(VI)

Structural changes of a NiFe-based metal-organic framework during the oxygen-evolution reaction under alkaline conditions

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Nanosized (Ni1−xZnx)Fe2O4for water oxidation

Abstract: Nanosized (Ni1−xZnx)Fe2O4 is a good catalyst for water oxidation under alkaline conditions.

Cited by 5 publications

References 50 publications

Mesoporous NiFe2O4 with Tunable Pore Morphology for Electrocatalytic Water Oxidation

Mesoporous NiFe2O4 with Tunable Pore Morphology for Electrocatalytic Water Oxidation

Oxygen-evolution reaction by nickel/nickel oxide interface in the presence of ferrate(VI)

Structural changes of a NiFe-based metal-organic framework during the oxygen-evolution reaction under alkaline conditions

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Nanosized (Ni_1−xZn_x)Fe₂O₄for water oxidation

Mesoporous NiFe₂O₄ with Tunable Pore Morphology for Electrocatalytic Water Oxidation

Mesoporous NiFe₂O₄ with Tunable Pore Morphology for Electrocatalytic Water Oxidation