Nitrogen-rich three-dimensional metal-organic framework microrods as an efficient electrocatalyst for oxygen evolution reaction and supercapacitor applications

Anwar, Muhammad Imran; Manzoor, Sumaira; Ma, Limin; Asad, Muhammad; Zhang, Wenhua; Shafiq, Zahid; Ashiq, Muhammad Naeem; Yang, Guang

doi:10.1016/j.fuel.2022.125746

Cited by 9 publications

(4 citation statements)

References 96 publications

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“…In recent years, metal chalcogenides have been synthesized by different methods, such as co‐precipitation, electrospinning, and hydrothermal methods and are preferred over Ru, Ir, and other non‐precious metal oxides in the OER process due to their flexible structures and covalencies 25 . These properties facilitate the transport of charges across the electrode/electrolyte contact 26 . High‐performance OER catalytic materials may be found in sulfides and selenides 27 .…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of vanadium telluride anchored on carbon nanotubes nanocomposite for overall water splitting

Bano,

Manzoor,

Sami

et al. 2024

J Am Ceram Soc.

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Electrocatalytic water splitting is an essential hydrogen production method for resolving present energy shortage and progress toward more efficient technologies. For this purpose, a versatile and cheap electrocatalysts are the main challenge along the way. In this report, we synthesized vanadium telluride and carbon nanotube (VTe–CNT)‐based nanocomposite via facile hydrothermal route. The VTe–CNTs are characterized by X‐ray diffraction analysis, scanning electron microscopy, energy‐dispersive spectroscopy, Fourier transform infrared spectroscopy, and Brunauer–Emmett–Teller. These characterizations depict nanosphere structures, morphology, and high surface area that maintains high porosity, which are essential for inclusive water‐splitting phenomena in 1.0 M solution of KOH. Additionally, the electrochemical performance of VTe–CNTs has shown best O2 evolution reactions activity with of onset potential of 1.42 V versus reversible hydrogen electrode and required 10 mA/cm2 of current density at 278 mV overpotential, which is excellent among other electrocatalysts, VTe (342 mV@10 mA/cm−2) and CNTs (365 mV@10mA/cm−2). Moreover, VTe–CNT exhibits remarkable stability for almost 20 h. It also requires a low onset potential of 0.05 V with a small Tafel slope of 47 mV/dec for H2 evolution reactions. Hence, this research might facilitate the easy transportation of electrons and open up the new era, serving as an excellent replacement for noble metal–derived materials.

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Section: Introductionmentioning

confidence: 99%

“…25 These properties facilitate the transport of charges across the electrode/electrolyte contact. 26 Highperformance OER catalytic materials may be found in sulfides and selenides. 27 On the other hand, tellurides have been manufactured for use in O 2 evolution in both alkaline and neutral and conditions.…”

mentioning

confidence: 99%

Fabrication of vanadium telluride anchored on carbon nanotubes nanocomposite for overall water splitting

Bano,

Manzoor,

Sami

et al. 2024

J Am Ceram Soc.

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“…In the high-resolution C 1s spectrum (Figure 3b), the deconvoluted peaks at 284.7, 285.8, and 288.2 are assigned to C�C/C−C, C−N/C�N, and O−C�O, respectively. 41,42 When compared to the C 1s spectrum of FeFFIVE-1-Ni in Figure S7a, the appearance of the peak at 288.2 in the o (2) -FeFFIVE-1-Ni C 1s spectrum suggests surface adsorption and chemical binding of oxygen, a consequence of the catalyst's calcination in air. 43 All three samples display a single convolved peak in the high-resolution N 1s spectrum (Figure 3c).…”

Section: Resultsmentioning

confidence: 98%

Air-Calcined Fe/Ni-Based Metal–Organic Framework Nanosheets for Oxygen Evolution Reactions

Zhang,

Xiao,

Feng

et al. 2024

ACS Appl. Nano Mater.

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The oxygen evolution reaction (OER) plays a pivotal role in the hydrolysis process of zinc−air batteries. Consequently, it is essential to develop cathode catalysts with both cost-effectiveness and high oxygen evolution activity. In this study, we synthesized the FeFFIVE-1-Ni two-dimensional (2D) metal− organic framework (MOF) nanosheets via a straightforward solvothermal approach and oxidized them in an air atmosphere. During the calcination process in an air atmosphere, the heteroatoms (O, F) within the FeFFIVE-1-Ni 2D MOF nanosheets combine with iron and nickel metal ions, forming FeOF and NiF 2 compounds. The synergy between these compounds and the creation of surface cracks during calcination yield catalytic active power and catalytic active sites essential for the oxygen evolution reaction. Notably, the overpotential of FeFFIVE-1-Ni 2D MOF nanosheets calcined in air under alkaline test conditions (η 10 = 286 mV) was lower than that of commercial RuO 2 catalysts (η 10 = 355 mV). This work presents an effective strategy for replacing noble metal catalysts such as RuO 2 by simply treating fluorinated metal−organic frameworks.

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“…However, it is well known that the efficiency of water electrolysis is associated with the overpotentials of the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) [6,7]. The high overpotential of the OER (4OH − → 2H 2 O + 4e − + O 2 in alkaline medium), due to the demanding transfer of four electrons in the anodic charge transfer reaction, represents the main bottleneck for the limited efficiencies [8][9][10][11]. The state-of-theart electrodes used in the OER mainly comprise Ir and Ru metals; however, their scarcity and high cost notably hinder their widespread application as electrocatalysts [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Cobalt Sulfide Heterostructures Fabricated on Nickel Foam Electrodes for Oxygen Evolution Reaction in Alkaline Water Electrolysis Cells

Poimenidis,

Papakosta,

Loukakos

et al. 2023

Surfaces

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Non-noble metal electrocatalysts for the oxygen evolution reaction (OER) have recently gained particular attention. In the present work, a facile one-step electrodeposition method is applied in situ to synthesize cobalt sulfide nanostructures on nickel foam (NF) electrodes. For the first time, a systematic study is carried out on the impact of the Co/S molar ratio on the structural, morphological, and electrochemical characteristics of Ni-based OER electrodes by employing Co(NO3)2·6 H2O and CH4N2S as Co and S precursors, respectively. The optimum performance was obtained for an equimolar Co:S ratio (1:1), whereas sulfur-rich or Co-rich electrodes resulted in an inferior behavior. In particular, the CoxSy@NF electrode with Co/S (1:1) exhibited the lowest overpotential value at 10 mA cm−2 (0.28 V) and a Tafel slope of 95 mV dec−1, offering, in addition, a high double-layer capacitance (CDL) of 10.7 mF cm−2. Electrochemical impedance spectroscopy (EIS) measurements confirmed the crucial effect of the Co/S ratio on the charge-transfer reaction rate, which is maximized for a Co:S molar ratio of 1:1. Moreover, field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and X-ray fluorescence (XRF) were conducted to gain insights into the impact of the Co/S ratio on the structural and morphological characteristics of the electrodes. Notably, the CoxSy@NF electrocatalyst with an equimolar Co:S ratio presented a 3D flower-like nanosheet morphology, offering an increased electrochemically active surface area (ESCA) and improved OER kinetics.

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Nitrogen-rich three-dimensional metal-organic framework microrods as an efficient electrocatalyst for oxygen evolution reaction and supercapacitor applications

Cited by 9 publications

References 96 publications

Fabrication of vanadium telluride anchored on carbon nanotubes nanocomposite for overall water splitting

Fabrication of vanadium telluride anchored on carbon nanotubes nanocomposite for overall water splitting

Air-Calcined Fe/Ni-Based Metal–Organic Framework Nanosheets for Oxygen Evolution Reactions

Highly Efficient Cobalt Sulfide Heterostructures Fabricated on Nickel Foam Electrodes for Oxygen Evolution Reaction in Alkaline Water Electrolysis Cells

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