Self-supported three-dimensional macroporous amorphous NiFe bimetallic-organic frameworks for enhanced water oxidation

Wei, Kangliang; Wang, Xiang; Jiao, Xiuling; Li, Cheng; Chen, Dairong

doi:10.1016/j.apsusc.2021.149323

Cited by 40 publications

(26 citation statements)

References 54 publications

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“…Likewise, the O 1s peaks were located at the 531.5, 530.5, and 532.8 eV peaks, which arose from the metal-oxygen, lattice oxygen, and absorbed oxygen, respectively (Figure d) . As for Ni 2p (Figure e), the peaks of 861.9 and 880.0 eV could be attributed to Ni 2p 3/2 and Ni 2p 1/2 of metallic Ni, and the peaks at 856.0 and 873.8 eV were attributed to the Ni 2p 3/2 and Ni 2p 1/2 of Ni 2+ . It can be seen from Figure f that the Fe 2p spectrum has peaks at 711.6 eV as well as 724.8 eV, which are assigned to Fe 2p 3/2 and Fe 2p 1/2 , respectively.…”

Section: Results and Discussionmentioning

confidence: 88%

NiFe-Layered Double Hydroxides as a Novel Hole Repository Layer for Reinforced Visible-Light Photocatalytic Activity for Degradation of Refractory Pollutants

Zhao

Long

et al. 2021

Ind. Eng. Chem. Res.

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Herein, reinforced functional catalysts, nickel-ironlayered double hydroxides/graphitic carbon nitride (NiFe-LDH/g-C 3 N 4 ) hybrid composites, were fabricated successfully by coupling NiFe-LDH with mesoporous g-C 3 N 4 microtubes spontaneously. Next, the as-prepared photocatalysts were evaluated and characterized by some advanced characterization techniques such as X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV−visible (vis) diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and photocurrent tests. Results demonstrated that NiFe-LDH can be identified as hole repository layers, which can distinctly decrease the recombination probabilities of photogenerated electron and hole pairs, thus increasing the degradation performance. It was discovered that 96.81% of tetracycline hydrochloride (TC) (20 mg/L) was removed within 60 min when the concentration of NiFe-LDH/g-C 3 N 4 was 0.4 g/L. Besides, NiFe-LDH/g-C 3 N 4 can almost completely degrade the pollutants methyl orange (MO) (95.71%) and rhodamine B (RhB) (96.26%). In addition, the cycle experiment proved that NiFe-LDH/g-C 3 N 4 possessed extraordinary reusability and photodegradation stability. Finally, a possible photocatalytic reaction mechanism was discussed, and this work would offer some insights into the design of related visible-light-induced catalysts for removal of various stubborn pollutants.

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Section: Results and Discussionmentioning

confidence: 88%

NiFe-Layered Double Hydroxides as a Novel Hole Repository Layer for Reinforced Visible-Light Photocatalytic Activity for Degradation of Refractory Pollutants

Zhao

Long

et al. 2021

Ind. Eng. Chem. Res.

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“…Compared with Fe-BDC, these signals of the Fe–O cluster migrates to the lower binding energy by 0.42 eV because part of Cd 2+ replaces Fe 3+ in the Fe-BDC lattice, leading to the change in the coordination bond and spatial structure. Meanwhile, the electron can move from Cd 2+ to Fe 3+ via the ligand oxygen, making it easy to form the electron-rich state of CdFe-BDC. In addition, it is possible that the Cd atoms are mainly exposed to the CdFe-BDC surface, which may be responsible for the negative shift .…”

Section: Resultsmentioning

confidence: 99%

Structural and Electronic Modulation of Iron-Based Bimetallic Metal–Organic Framework Bifunctional Electrocatalysts for Efficient Overall Water Splitting in Alkaline and Seawater Environment

Luo

Yang

et al. 2022

ACS Appl. Mater. Interfaces

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Metal–organic frameworks (MOFs) are considered potential electrocatalysts for efficient water splitting. However, the structure–activity relationship of most MOFs is not systematically analyzed for electrocatalysis for anodes and cathodes. In this paper, we provide a strategy to modulate the electronic microstructure of iron-based bimetallic MOFs (MFe-BDC (M: Mg, Zn, Cd)) grown on the nickel foam (NF) as bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The optimal bimetallic CdFe-BDC via modulating appropriate metal cations of IIA and IIB possesses excellent OER and HER performance with the lowest overpotentials of 290 mV at 100 mA cm–2 and 148 mV at 10 mA cm–2, respectively. The overall water splitting performance of the as-prepared CdFe-BDC requires 1.68 V to achieve a current density of 10 mA cm–2 in the real seawater media, and it exhibits the competitive H2 and O2 production rates of 6.4 and 3.1 μL s–1, respectively, in ambient alkaline conditions, suggesting its potential practical applications. Density functional theory (DFT) calculations demonstrate the relationship between microstructure and electrocatalytic performance of bimetallic MFe-BDC. This work emphasizes the significance of tailoring the electronic microstructure of bimetallic MOFs for efficient overall water splitting in alkaline and seawater environment.

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“…This confirms that FeNiCu has a hierarchical porous structure, which is believed to be conducive to increasing the active surface area to boost the OER performance. 42…”

Section: Resultsmentioning

confidence: 99%

Amorphous FeNiCu-MOFs as highly efficient electrocatalysts for the oxygen evolution reaction in an alkaline medium

Zhai

Ding

et al. 2022

Dalton Trans.

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Self-supported three-dimensional macroporous amorphous NiFe bimetallic-organic frameworks for enhanced water oxidation

Cited by 40 publications

References 54 publications

NiFe-Layered Double Hydroxides as a Novel Hole Repository Layer for Reinforced Visible-Light Photocatalytic Activity for Degradation of Refractory Pollutants

NiFe-Layered Double Hydroxides as a Novel Hole Repository Layer for Reinforced Visible-Light Photocatalytic Activity for Degradation of Refractory Pollutants

Structural and Electronic Modulation of Iron-Based Bimetallic Metal–Organic Framework Bifunctional Electrocatalysts for Efficient Overall Water Splitting in Alkaline and Seawater Environment

Amorphous FeNiCu-MOFs as highly efficient electrocatalysts for the oxygen evolution reaction in an alkaline medium

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