Fabrication of Ni–MOF-derived composite material for efficient electrocatalytic OER

Rehman, Muhammad Yousaf ur; Hussain, Dilshad; Abbas, Sajid; Qureshi, Ashfaq Mahmood; Chughtai, Adeel Hussain; Najam‐ul‐Haq, Muhammad; Alsubaie, Abdullah; Manzoor, Sumaira; Mahmoud, Khaled H.; Ashiq, Muhammad Naeem

doi:10.1080/16583655.2021.1996944

Cited by 15 publications

(7 citation statements)

References 68 publications

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“…33 Among all, CNTs are best due to their unique dimensionality. 34 On the other hand, CNTs are found to be active supports due to their unique structural characteristics, including electronic conductivity, flexible functional groups, and greater specific surface area, which permit selective interaction with the precursor complex of active component; moreover, CNT production has become an industrial process in current ages. 35 Researchers have developed a wide variety of metal-Te-based electrocatalysts, including Na.…”

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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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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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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“…For the electrocatalytic water oxidation reaction, besides having excellent activity, stability is also an important indicator for the development of excellent electrocatalysts. 42 Therefore, we applied chronoamperometry to measure the stability of Cr 2 O 3 /CrO 3 /CrN@ NCs-1000 in 1.0 M KOH electrolyte under a constant overpotential of 50 mA•cm −2 , as shown in Figure 3d. After 15 h of stability testing, its degradation reached a negligible level, indicating that Cr 2 O 3 /CrO 3 /CrN@NCs-1000 has excellent stability for the OER in an alkaline medium.…”

Section: Resultsmentioning

confidence: 99%

A Comprehensive Pyrolysis Mechanism of Binuclear Chromium-Based Complexes for Superior OER Activity

Gan,

Li,

Yang

et al. 2024

ACS Appl. Mater. Interfaces

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Transition metal oxides are widely pursued as potent electrocatalysts for the oxygen evolution reaction (OER). However, single-metal chromium catalysts remain underexplored due to their intrinsic activity limitations. Herein, we successfully synthesize mixed-valence, nitrogen-doped Cr 2 O 3 /CrO 3 /CrN@NC nanoelectrocatalysts via one-step targeted pyrolysis techniques from a binuclear Cr-based complex (Cr 2 (Salophen) 2 (CH 3 OH) 2 ), which is strategically designed as a precursor. Comprehensive pyrolysis mechanisms were thoroughly delineated by using coupled thermogravimetric analysis and mass spectrometry (TG−MS) alongside X-ray diffraction. Below 800 °C, the generation of a reducing atmosphere was noted, while continuous pyrolysis at temperatures exceeding 800 °C promoted highly oxidized CrO 3 species with an elevated +6 oxidation state. The optimized catalyst pyrolyzed at 1000 °C (Cr 2 O 3 /CrO 3 /CrN@NCs-1000) demonstrated remarkable OER activity with a low overpotential of 290 mV in 1 M KOH and excellent stability. Further density functional theory (DFT) calculations revealed a much smaller reaction energy barrier of CrO 3 than the low oxidation state species for OER reactivity. This work reveals fresh strategies for rationally engineering chromium-based electrocatalysts and overcoming intrinsic roadblocks to enable efficient OER catalysis through a deliberate oxidation state and compositional tuning.

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“…The synthesized OER electrocatalyst displays less overpotential of 1.42 V to achieve a target current density that is 10 mA cm −2 with a 34 mV dec −1 minimum value of the Tafel plot. 42 Xian Wang et al have introduced the CNT-NC-CoP composite with an extremely small overpotential of 251 mV and a lower Tafel plot value that was 82.1 mV dec −1 for outstanding OER performance. 43 ZnCo 2 O 4 @C-MwCNTs were prepared by Juntao Liu et al for enhanced electrocatalytic activities of the OER with the lowest overpotential of 327 mV at the standard 10 mA cm −2 current density with a small value Tafel slope that is 89 mV dec −1 .…”

Section: Introductionmentioning

confidence: 99%

“…Yousaf-ur-Rehman et al prepared an MOF based calcined composite material (cal.CDs@MOF) that was used to catalyze the slow OER. The synthesized OER electrocatalyst displays less overpotential of 1.42 V to achieve a target current density that is 10 mA cm –2 with a 34 mV dec –1 minimum value of the Tafel plot . Xian Wang et al have introduced the CNT-NC-CoP composite with an extremely small overpotential of 251 mV and a lower Tafel plot value that was 82.1 mV dec –1 for outstanding OER performance .…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of a Nickel-Based Dopamine MOF/Multiwalled Carbon Nanotubes Nanocomposite as an Efficient Electrocatalyst for the Oxygen Evolution Reaction

et al. 2023

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For manufacturing hydrogen energy via water splitting is the most important consequence for the revolution of a power disaster, and a vigorous and inexpensive electrocatalyst is the most challenging task. Herein, we report a unique MOF derived nanocomposite as an electrocatalyst (Ni-DA-MWCNTs-a) fabricated through the hydrothermal method, with ultrahigh functionality for the catalytic OER. The Ni-DA-MWCNTs-a synthesized electrocatalyst displays extremely porous morphology and is characterized by a number of different techniques. The fabricated nanocomposite demonstrates an extremely low overpotential of 267 mV, with a minimum Tafel slope of 61 mV dec −1 , considering the three-electron transfer process. Furthermore, the resultant nanocomposite displays the outstanding stability of 20 h and is confirmed by chronoamperometry. Hence, this work also exposed the valuable visions for the development of an inexpensive, effective, and useful electrocatalyst with an extremely small overpotential and good long-lasting durability for OER performance by utilizing 3D-MWCNTs resulting in a major alternative material derived from noble metals.

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Fabrication of Ni–MOF-derived composite material for efficient electrocatalytic OER

Cited by 15 publications

References 68 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

A Comprehensive Pyrolysis Mechanism of Binuclear Chromium-Based Complexes for Superior OER Activity

Facile Synthesis of a Nickel-Based Dopamine MOF/Multiwalled Carbon Nanotubes Nanocomposite as an Efficient Electrocatalyst for the Oxygen Evolution Reaction

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