Efficient oxygen evolution reaction from iron-molybdenum nitride/molybdenum oxide heterostructured composites

Wang, Aijian; Dou, Yuqin; Yang, Xin; Wang, Qi; Sudi, M. Shire; Zhao, Long; Shang, Danhong; Zhu, Weihua; Ren, Jinshen

doi:10.1039/d3dt01295f

Cited by 56 publications

(9 citation statements)

References 43 publications

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“…The pathways for the synthesized electrocatalyst ensues H 2 O adsorption followed by the eventual splitting of the water molecule into H + and OH – atoms (Volmer); this is followed by desorption of OH – from the electrocatalyst surface and recombination of two H + atoms to generate H 2 (Heyrovsky). The sluggish dissociation of H 2 O molecule from the electrocatalyst surface in alkaline media, that is, the Volmer step, is attributed as the rate-determining step. − …”

Section: Resultsmentioning

confidence: 99%

Room-Temperature Synthesis of Biogenic δ-MnO₂ NPs for the Dehydrogenative Coupling of Diamines with Alcohols for Benzimidazole and Quinoxaline Synthesis: An Efficient Catalyst for Electrochemical Applications

R.,

Yhobu,

Budagumpi

et al. 2023

Langmuir

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An efficient, unique, and eco-friendly biogenic synthesis of singlecrystalline δ-phase manganese oxide nanoparticles (MnO 2 NPs) using Gliricidia sepium leaves (GSL) extract at room temperature has been revealed for the first time. The active chemicals present in the GSL extract were found to serve as both reducing and stabilizing agents. The catalyst shows an excellent surface area of 301.13 m 2 g −1 , a mean pore diameter of 4.01 nm, and 39.97% w/w of active metal content. The reactivity of the synthesized catalyst was demonstrated by achieving a one-pot synthesis of benzimidazoles and quinoxalines via an acceptorless dehydrogenative coupling strategy utilizing biorenewable alcohols. The release of hydrogen gas was observed as the only side product and proven by its successful utilization for alkene reduction which supports the mechanistic elucidation. The release of hydrogen gas as a useful byproduct highlights the scientific importance of the present methodology. Additionally, gram-scale synthesis and catalyst recyclability studies are deliberated. Importantly, the δ-MnO 2 NP catalyst exhibited superior catalytic activity and high durability toward hydrogen evolution reaction in alkaline media, highlighting the dual use of the catalyst. The δ-MnO 2 NPs attain the current density of 10 mA/cm 2 at an overpotential of 154 mV with a Tafel slope of 119 mV/dec.

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Section: Resultsmentioning

confidence: 99%

Room-Temperature Synthesis of Biogenic δ-MnO₂ NPs for the Dehydrogenative Coupling of Diamines with Alcohols for Benzimidazole and Quinoxaline Synthesis: An Efficient Catalyst for Electrochemical Applications

R.,

Yhobu,

Budagumpi

et al. 2023

Langmuir

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“…Ultrasonic vibrations aid in stabilizing the ECDM process by lowering the probability of sparking occurring in areas of the workpiece that are not intended for machining. This stability is essential for preserving the accuracy of the machining and reducing the amount of overcut, particularly at higher feed rates [45][46][47]. The hypothesis suggests that when the tool's feed rate increases, there is an enhancement of the circulation of the electrolyte within the machining area [36].…”

Section: Influence Of Process Parameters On the Overcut Of The Machin...mentioning

confidence: 99%

Experimental investigation of micro-machining of borosilicate glass using an ultrasonic assisted rotary electrochemical discharge machining (UA-RECDM) process

Grover,

Mangal,

Singh

et al. 2024

J. Micromech. Microeng.

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Electrochemical Discharge Machining is an advanced micro-machining process for machining of conductive as well as non-conductive hard and brittle materials i.e., glass, ceramic and silicon wafer etc. The present work explores the machining of glass using in-house developed novel Ultrasonic Assisted Rotary Electrochemical Discharge Machining (UA-RECDM) setup. The setup has specialised features which includes ultrasonic vibrations to tool electrode and rotary motion to workpiece. Experiments were conducted using one factor at a time approach (OFAT) approach by varying tool feed rate, amplitude of vibrations and rotation of workpiece as process parameters. The quality of the machining output was evaluated by observing two key parameters: overcut and circularity of the hole. It was observed that as the workpiece rotation speed increased from 40 RPM to 60 RPM, the overcut in the machined samples decreased from 181.378 µm to 163.564 µm. The rotary motion of workpiece causes seeping action of the electrolyte at hydrodynamic regime and results in thin gas film formation & stabilized discharging phenomenon. The morphology of machined hole exhibits better circularity, low HAZs, minimum micro-cracks and smooth edges at periphery due to stable discharge formation.

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“…[1,2] A transformative era has unfolded with the unearthing of nanoparticles featuring diverse sizes, shapes, and compositions, transcending the scientific constraints of bygone years. [3,4] Magnetic nanoparticles, in particular, have emerged as captivating entities with myriad applications across various domains. [5,6] The magnetic allure lies in their water solubility and inherent magnetism, enabling facile separation from reaction mixtures using a magnet.…”

Section: Introductionmentioning

confidence: 99%

One–Pot Three–Component Synthesis of 2,4,5–Triaryl Imidazoles using Fe3O4@BisImid−CuBr Nanocomposite as an Ecofriendly and Efficient Magnetically Reusable Catalyst

Al‐Dolaimy,

Alsalamy,

Abdullah Abbas

et al. 2024

ChemistrySelect

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Imidazoles are one of the keys of N‐heterocycle molecules that exist in the structure of many biomolecules. In this research project, we reported that Fe3O4@BisImid−CuBr nanocomposite is an attractive and efficient nanomagnetic catalyst to afford 2,4,5–triaryl imidazoles through reactions of 1,2–diketones and aldehydes in the presence of NH4OAc under ecofriendly conditions. The Fe3O4@BisImid−CuBr nanocomposite was readily fabricated by a simple method from available reagents and its structure was analyzed by spectroscopic techniques. SEM and TEM images affirmed the formation of particles in spherical shape and nanometer–size. Under this methodology, a diverse library of triaryl imidazoles were afforded with high yields in water. This synthetic methodology has significant features such as (a) high yields and high purity of the products (b) suitable reaction time (c) use of magnetic reusable nanocatalyst (d) high reusability of Fe3O4@BisImid−CuBr nanocatalyst and the performance of reactions in aqueous medium.

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Efficient oxygen evolution reaction from iron-molybdenum nitride/molybdenum oxide heterostructured composites

Abstract: Integrating various active sites into a multi-component system, one might significantly enhance the oxygen evolution reaction (OER) performance. Herein, the as-prepared iron-molybdenum nitride/molybdenum oxide (Fe-Mo5N6/MoO3-550) composite electrocatalyst under optimum conditions...

Cited by 56 publications

References 43 publications

Room-Temperature Synthesis of Biogenic δ-MnO₂ NPs for the Dehydrogenative Coupling of Diamines with Alcohols for Benzimidazole and Quinoxaline Synthesis: An Efficient Catalyst for Electrochemical Applications

Room-Temperature Synthesis of Biogenic δ-MnO₂ NPs for the Dehydrogenative Coupling of Diamines with Alcohols for Benzimidazole and Quinoxaline Synthesis: An Efficient Catalyst for Electrochemical Applications

Experimental investigation of micro-machining of borosilicate glass using an ultrasonic assisted rotary electrochemical discharge machining (UA-RECDM) process

One–Pot Three–Component Synthesis of 2,4,5–Triaryl Imidazoles using Fe3O4@BisImid−CuBr Nanocomposite as an Ecofriendly and Efficient Magnetically Reusable Catalyst

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Efficient oxygen evolution reaction from iron-molybdenum nitride/molybdenum oxide heterostructured composites

Abstract: Integrating various active sites into a multi-component system, one might significantly enhance the oxygen evolution reaction (OER) performance. Herein, the as-prepared iron-molybdenum nitride/molybdenum oxide (Fe-Mo5N6/MoO3-550) composite electrocatalyst under optimum conditions...

Cited by 56 publications

References 43 publications

Room-Temperature Synthesis of Biogenic δ-MnO2 NPs for the Dehydrogenative Coupling of Diamines with Alcohols for Benzimidazole and Quinoxaline Synthesis: An Efficient Catalyst for Electrochemical Applications

Room-Temperature Synthesis of Biogenic δ-MnO2 NPs for the Dehydrogenative Coupling of Diamines with Alcohols for Benzimidazole and Quinoxaline Synthesis: An Efficient Catalyst for Electrochemical Applications

Experimental investigation of micro-machining of borosilicate glass using an ultrasonic assisted rotary electrochemical discharge machining (UA-RECDM) process

One–Pot Three–Component Synthesis of 2,4,5–Triaryl Imidazoles using Fe3O4@BisImid−CuBr Nanocomposite as an Ecofriendly and Efficient Magnetically Reusable Catalyst

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Room-Temperature Synthesis of Biogenic δ-MnO₂ NPs for the Dehydrogenative Coupling of Diamines with Alcohols for Benzimidazole and Quinoxaline Synthesis: An Efficient Catalyst for Electrochemical Applications

Room-Temperature Synthesis of Biogenic δ-MnO₂ NPs for the Dehydrogenative Coupling of Diamines with Alcohols for Benzimidazole and Quinoxaline Synthesis: An Efficient Catalyst for Electrochemical Applications