In-situ synthesis of free-standing FeNi-oxyhydroxide nanosheets as a highly efficient electrocatalyst for water oxidation

Wang, Zhiqiang; Lei, Qingjuan; Wang, Zhenyu; Yuan, Huan; Cao, Lujie; Qin, Ning; Lu, Zhouguang; Xiao, Juanxiu; Liu, Jinlong

doi:10.1016/j.cej.2020.125180

Cited by 105 publications

(35 citation statements)

References 64 publications

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“…Although noble metals are the most efficient catalysts for DRM with a low coke deactivation tendency, they are too costly [19]. Recently, Ni-based catalysts are evaluated as good substitutes for noble metal catalysts due to their comparable catalytic performance, wide availability, and lower cost in the DRM process [20,21]. Despite wide application of Ni-based catalysts in the DRM process, they suffer from different issues such as deactivation with coke and sintering at high temperatures which limits their applications on the industrial scale [22,23].…”

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Promoted Nickel–Cobalt Bimetallic Catalysts for Biogas Reforming

et al. 2021

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The catalytic performance of Ni, Co, and Ni-Co-based catalysts on Al 2 O 3 support are investigated in the dry methane reforming reaction. Besides, the influence of La or Y promoters on catalytic activity and structural properties of synthesized catalysts are examined in this paper. The prepared catalysts are characterized using N 2 Adsorption/Desorption, FESEM, EDX, and XRD techniques. Higher average CH 4 and CO 2 conversions, as well as hydrogen yield, are obtained using Ni-Co catalyst with equal weight ratios. This could be the result of better dispersion of active sites according to the FESEM images and thus higher BET surface area of this catalyst compared with other un-promoted ones. Although the addition of La does not enhance the catalytic activity and structural properties of the 9Ni-9Co/Al 2 O 3 sample, the presence of Y 2 O 3 particles has a positive effect on both mentioned catalyst features. The maximum CH 4 conversion of 99.39%, CO 2 conversion of 92.38%, H 2 yield of 86.20% and H 2 /CO molar ratio of 1.50 are achieved using 5Y-9Ni-9Co/Al 2 O 3 at 700 °C. Besides, this catalyst shows lower deposited coke and higher stability compared with other promoted/un-promoted catalysts. The comparison between the activity of 5Y-9Ni-9Co/Al 2 O 3 and industrial 18%Ni/Al 2 O 3 during 11 h DRM shows that although 18%Ni/ Al 2 O 3 has higher conversions at first 9 h, its activity is decreased more than 5Y-9Ni-9Co/Al 2 O 3 due to the coke deposition.

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Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Promoted Nickel–Cobalt Bimetallic Catalysts for Biogas Reforming

et al. 2021

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“…The mechanism of electron transfer in the modified electrode can be explained as follows: In this catalytic process, during the reduction of H 2 O 2 on the CuO surface, Cu 2+ is electrochemically reduced to Cu + and H 2 O 2 to O 2 . Then, Cu + on the electrode surface is electrooxidized back to Cu 2+ , and the catalytic cycle is repeated [ 55 , 81 – 82 ].…”

Section: Resultsmentioning

confidence: 99%

“…Nanostructured materials are widely used as the working surface of the electrode [ 47 – 49 ]. The most common are transition metal nanoparticles [ 33 , 37 , 50 – 54 ], carbon nanotubes [ 8 ], metal oxides [ 55 – 64 ], graphene [ 32 – 33 ], and ordered mesoporous carbon [ 38 , 65 – 66 ]. Compared to bulk materials, nanostructures have higher catalytic activity and a significantly increased surface area-to-volume ratio, which makes it possible to significantly increase both sensitivity of the sensor and rate of detection of H 2 O 2 .…”

Section: Introductionmentioning

confidence: 99%

A non-enzymatic electrochemical hydrogen peroxide sensor based on copper oxide nanostructures

Mihailova¹,

Gerbreders²,

Krasovska³

et al. 2022

Beilstein J. Nanotechnol.

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This article describes the synthesis of nanostructured copper oxide on copper wires and its application for the detection of hydrogen peroxide. Copper oxide petal nanostructures were obtained by a one-step hydrothermal oxidation method. The resulting coating is uniform and dense and shows good adhesion to the wire surface. Structure, surface, and composition of the obtained samples were studied using field-emission scanning electron microscopy along with energy-dispersive spectroscopy and X-ray diffractometry. The resulting nanostructured samples were used for electrochemical determination of the H2O2 content in a 0.1 M NaOH buffer solution using cyclic voltammetry, differential pulse voltammetry, and i–t measurements. A good linear relationship between the peak current and the concentration of H2O2 in the range from 10 to 1800 μM was obtained. The sensitivity of the obtained CuO electrode is 439.19 μA·mM−1. The calculated limit of detection is 1.34 μM, assuming a signal-to-noise ratio of 3. The investigation of the system for sensitivity to interference showed that the most common interfering substances, that is, ascorbic acid, uric acid, dopamine, NaCl, glucose, and acetaminophen, do not affect the electrochemical response. The real milk sample test showed a high recovery rate (more than 95%). According to the obtained results, this sensor is suitable for practical use for the qualitative detection of H2O2 in real samples, as well as for the quantitative determination of its concentration.

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“…Chemical transformation is a simpler method to obtain various structures as desired under ambient conditions. Zhiqiang Wang et al reported a facile method to synthesis FeNiOOH nanosheets on FeNi foam (FNF) by in-situ chemical oxidation for OER, which took a long-time reparation process ( Wang et al, 2020 ). Especially, Prussian blue analogs (PBAs), which can be synthesized under room temperature in aqueous solution, have been regarded as promising precursors for the synthesis of various types of materials, e.g., transition metal alloys, oxides, sulfides, (oxy)hydroxides, etc.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Assemble of Prussian Blue Analog to Access Hierarchical FeNi (oxy)-Hydroxide Nanosheets for Electrocatalytic Water Splitting

Hong

Cai

et al. 2022

Front. Chem.

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Developing facile methods for the synthesis of active and stable electrocatalysts is vitally important to realize overall water splitting. Here, we demonstrate a practical method to obtain FeNiOOH nanosheets on nickel foam (NF) as bifunctional electrocatalyst by growing a FeCo Prussian blue analog with further in situ oxidation under ambient conditions. The binder-free, self-standing FeNiOOH/NF electrode with hierarchical nanostructures requires low overpotentials of 260 mV and 240 mV at a current density of 50 mA cm−2 for oxygen evolution reaction and hydrogen evolution reaction, respectively, in 1.0 M KOH solution. Therefore, an alkaline water electrolyzer constructed by bifunctional FeNiOOH/NF electrode as both anode and cathode delivers 50 mA cm−2 under a cell voltage of 1.74 V with remarkable stability, which outperforms the IrO2-Pt/C-based electrolyzer. The excellent performance could be ascribed to the superior FeNiOOH intrinsic activity and the hierarchical structure. This work provides a cost-efficient surface engineering method to obtain binder-free, self-standing bifunctional electrocatalyst on commercial NF, which could be further extended to other energy and environment applications.

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In-situ synthesis of free-standing FeNi-oxyhydroxide nanosheets as a highly efficient electrocatalyst for water oxidation

Cited by 105 publications

References 64 publications

RETRACTED ARTICLE: Promoted Nickel–Cobalt Bimetallic Catalysts for Biogas Reforming

RETRACTED ARTICLE: Promoted Nickel–Cobalt Bimetallic Catalysts for Biogas Reforming

A non-enzymatic electrochemical hydrogen peroxide sensor based on copper oxide nanostructures

Interfacial Assemble of Prussian Blue Analog to Access Hierarchical FeNi (oxy)-Hydroxide Nanosheets for Electrocatalytic Water Splitting

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