Construction of Co3O4/Fe2O3 nanosheets on nickel foam as efficient electrocatalyst for the oxygen evolution reaction

Yang, Yuying; Zhu, Cuimei; Zhang, Yan; Xie, Yandong; Lv, Liwen; Chen, Wenlian; He, Yuanyuan; Hu, Zhongai

doi:10.1016/j.jpcs.2020.109680

Cited by 21 publications

(5 citation statements)

References 44 publications

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“…Recent advances have been made to improve water splitting performance with an iron (III) oxide catalyst owing to the corrosion resistance, mechanical strength, and low price of the material [31]. Because the overpotential of Fe2O3 is relatively high, further improvements to enhance conversion efficiency and durability are still needed [32,33]. Several design strategies, including nanostructuring, doping, and assembly in multilayer junctions, have been adopted, and reports have revealed that a second metal doped into Fe2O3 materials can enhance the electrocatalytic activity because the doped metal is inserted into the lattices of Fe2O3, modulating its local electronic structures and coordination environment [34].…”

Section: Introductionmentioning

confidence: 99%

Controllable synthesis of a self-assembled ultralow Ru, Ni-doped Fe2O3 lily as a bifunctional electrocatalyst for large-current-density alkaline seawater electrolysis

Cui

Zhai²,

Guo³

et al. 2022

Chinese Journal of Catalysis

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Section: Introductionmentioning

confidence: 99%

Controllable synthesis of a self-assembled ultralow Ru, Ni-doped Fe2O3 lily as a bifunctional electrocatalyst for large-current-density alkaline seawater electrolysis

Cui

Zhai²,

Guo³

et al. 2022

Chinese Journal of Catalysis

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“…The catalyst showed extremely good stability while having a relatively high overpotential of 660 mV for OER and 350 mV for HER. In different research by Yang et al ., iron (III) oxide (Fe 2 O 3 ) was hydrothermally doped with cobalt oxide (Co 3 O 4 ) 42 . Effective charge transfer on the composite is made possible by the synergistic interaction between the transition metals and the unpaired d‐orbitals in Fe and Co.…”

Section: Introductionmentioning

confidence: 99%

“…In different research by Yang et al, iron (III) oxide (Fe 2 O 3 ) was hydrothermally doped with cobalt oxide (Co 3 O 4 ). 42 Effective charge transfer on the composite is made possible by the synergistic interaction between the transition metals and the unpaired d-orbitals in Fe and Co. This led to better OER catalytic performance.A Co 3 O 4 -MnO 2 -CNT nanocomposite was created and used for water splitting in another effort by Xie et al 43 According to the findings of their research, an OER took place at a current density of 10 mA cm −2 and an overpotential of 500 mV with a Tafel slope of 58 mV dec −1 .…”

Section: Introductionmentioning

confidence: 99%

Bio‐inspired NiO/ZrO₂ mixed oxides (NZMO) for oxygen evolution reactions: from facile synthesis to electrochemical analysis

Zahra

Ahmad

Zequine

et al. 2022

J of Chemical Tech & Biotech

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Background: Earth's abundant natural materials can be exploited for their potential in producing economically viable and sustainable electrocatalysts for clean energy generation. Herein, we employed a low cost and environmentally benign synthesis approach using plant extract as capping agent to synthesize bimetallic NiO/ZrO 2 (nickel/Zirconiu mixed oxides; NZMO), and then studied their electrocatalytic properties.Results: The synthesized material was characterized for its elemental, compositional and morphological feature elucidation. The phytocapping agents were probed by Fourier transform infrared spectroscopy (FTIR) and gas chromatography-mass spectroscopy (GC-MS) which confirmed the active contribution of phytocompounds in synthesis as capping and stabilizing agents. Elemental and X-ray photoelectron spectroscopic (XPS) analysis manifested the presence of Ni, Zr and O content with morphological elucidations representing well-defined structures. The synthesized material was systematically investigated for electrocatalytic performance towards an oxygen evolution reaction (OER). Electrochemical testing showed that the NZMO exhibits remarkable enhanced catalytic activity with 0.39 V overpotential value and 72 mV dec −1 Tafel value at an existing density of 10 mA cm −2 , which is comparable to that of precious metal catalysts. Conclusion: Experimental investigation demonstrates that the remarkable OER performance of NZMO could be attributed to intrinsic catalytic properties originating as a result of binary materials. Moreover, the organic compounds involved in the synthesis mechanism also could be the major contributors in terms of provision of active sites due to protons. Thus, the present work presents a promising electrocatalytic material using mixed metal oxides and paves a novel path toward the green synthesis of binary oxides with improved electrocatalytic performance.

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“…At the same time, a small portion of NiHCF is easily decomposed into Fe 2 O 3 nanowire byproducts under the condition of high temperature, resulting in the formation of a mixture of NiHCF microcuboids and Fe 2 O 3 nanowires. Second, Fe 2 O 3 nanowires with poor catalytic activity for OER are removed by HCl etching. − The obtained products after etching are labeled as e-NiHCF. Finally, after about 100 cycles of CV activation, a-NiHCF was obtained.…”

Section: Results and Discussionmentioning

confidence: 99%

In Situ Synthesis of Superhydrophilic Amorphous NiFe Prussian Blue Analogues for the Oxygen Evolution Reaction at a High Current Density

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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Synthesis of efficient and low-cost catalysts for the oxygen evolution reaction (OER) is a pivotal process for large-scale electrocatalytic water splitting to produce hydrogen. Prussian blue analogues (PBAs) prepared by the conventional co-precipitation method, with a less active site density and a poor electrical transport, are often used as precursors for further preparation of PBA derivatives, such as metal oxides, metal alloys, metal phosphides, and so on, due to their poor OER activity. In this report, controllable synthesis of NiFe PBA with Fe2O3 byproducts on a Ni foam substrate was achieved through a facile one-step hydrothermal reaction by adjusting the amount of urea and potassium ferricyanide. After chemical etching and electrochemical activation, NiFe PBA was entirely transformed into amorphous superhydrophilic NiFe PBA (denoted a-NiHCF), which exhibited a remarkable OER performance at a large current density. To drive high current densities of 400 and 800 mA cm–2, only ultralow overpotentials of 280 and 309 mV were required, respectively, which far exceed many recently reported OER catalysts. The superior performance can be attributed to the following: (1) in situ growth on a metal foam substrate can improve the structural stability and provide a faster charge transfer as well as oxygen bubble release; (2) chemical etching allows exposing more surface active sites; (3) an electrochemical activation-induced amorphous surface possesses a larger Brunauer–Emmett–Teller surface area, more high-valent oxidation states, and higher intrinsic OER activity; and (4) the superhydrophilic surface structure is conducive to the adsorption of water molecules. These advantages make a-NiHCF a promising candidate for application in the field of electrocatalytic water splitting.

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Construction of Co3O4/Fe2O3 nanosheets on nickel foam as efficient electrocatalyst for the oxygen evolution reaction

Cited by 21 publications

References 44 publications

Controllable synthesis of a self-assembled ultralow Ru, Ni-doped Fe2O3 lily as a bifunctional electrocatalyst for large-current-density alkaline seawater electrolysis

Controllable synthesis of a self-assembled ultralow Ru, Ni-doped Fe2O3 lily as a bifunctional electrocatalyst for large-current-density alkaline seawater electrolysis

Bio‐inspired NiO/ZrO₂ mixed oxides (NZMO) for oxygen evolution reactions: from facile synthesis to electrochemical analysis

In Situ Synthesis of Superhydrophilic Amorphous NiFe Prussian Blue Analogues for the Oxygen Evolution Reaction at a High Current Density

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Construction of Co3O4/Fe2O3 nanosheets on nickel foam as efficient electrocatalyst for the oxygen evolution reaction

Cited by 21 publications

References 44 publications

Controllable synthesis of a self-assembled ultralow Ru, Ni-doped Fe2O3 lily as a bifunctional electrocatalyst for large-current-density alkaline seawater electrolysis

Controllable synthesis of a self-assembled ultralow Ru, Ni-doped Fe2O3 lily as a bifunctional electrocatalyst for large-current-density alkaline seawater electrolysis

Bio‐inspired NiO/ZrO2 mixed oxides (NZMO) for oxygen evolution reactions: from facile synthesis to electrochemical analysis

In Situ Synthesis of Superhydrophilic Amorphous NiFe Prussian Blue Analogues for the Oxygen Evolution Reaction at a High Current Density

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Bio‐inspired NiO/ZrO₂ mixed oxides (NZMO) for oxygen evolution reactions: from facile synthesis to electrochemical analysis