Recent Advances in Hydrogen Evolution Reaction Using First-Row Transition Metal Complexes as Catalyst

Swathika, M.; Arunadevi, N.

doi:10.1149/10701.5763ecst

ECS Trans.

2022

DOI: 10.1149/10701.5763ecst

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Recent Advances in Hydrogen Evolution Reaction Using First-Row Transition Metal Complexes as Catalyst

M. Swathika¹,

N. Arunadevi²

Abstract: The precise use of an electrocatalyst for the HER reaction mainly depends on synthesis cost, durability, and over potential. Recently there is promising research for electrocatalyst synthesis using first-row transition metals. Working towards this herein we present synthesis, physio-chemical characterization, and hydrogen evolution activity of amino guanidium metal naphthoate complexes. The obtained electrocatalysts were characterized by element analysis, IR spectra, UV-Visible spectroscopy, TG-DTA, and powder… Show more

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Cited by 3 publications

References 15 publications

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Electrochemical Nickel‐Catalyzed Hydrogenation

Li,

Wang,

2024

Angewandte Chemie

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Olefin hydrogenation is one of the most important transformations in organic synthesis. Electrochemical transition metal‐catalyzed hydrogenation is an attractive approach to replace the dangerous hydrogen gas with electrons and protons. However, this reaction poses major challenges due to rapid hydrogen evolution reaction (HER) of metal‐hydride species that outcompetes alkene hydrogenation step, and facile deposition of the metal catalyst at the electrode that stalls reaction. Here we report an economical and efficient strategy to achieve high selectivity for hydrogenation reactivity over the well‐established HER. Using an inexpensive and bench‐stable nickel salt as the catalyst, this mild reaction features outstanding substrate generality and functional group compatibility, and distinct chemoselectivity. In addition, hydrodebromination of alkyl and aryl bromides could be realized using the same reaction system with a different ligand, and high chemoselectivity between hydrogenation and hydrodebromination could be achieved through ligand selection. The practicability of our method has been demonstrated by the success of large‐scale synthesis using catalytic amount of electrolyte and a minimal amount of solvent. Cyclic voltammetry and kinetic studies were performed, which support a NiII/0 catalytic cycle and the pre‐coordination of the substrate to the nickel center.

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Electrochemical Nickel‐Catalyzed Hydrogenation

Li,

Wang,

2024

Angewandte Chemie

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Electrochemical Nickel‐Catalyzed Hydrogenation

Li,

Wang,

2024

Angew Chem Int Ed

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Synthesis and photometric properties of efficient white‐emitting phosphor of M‐AMG transition metal complexes for OLED applications

Swathika¹,

Natarajan²

2022

Luminescence

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Progression in lighting sources mainly depended on new, robust energy‐efficient diodes due to their advanced photometric properties. All organic light‐emitting sources are constant energy‐efficient devices and will be the light of the future. We explore the potential of transition metal complexes by focusing on cobalt(II), nickel(II), and copper (II) with aminoguanidine naphthoate as white phosphors in organic light‐emitting diodes (OLEDs). The phosphors synthesized at optimized temperature were characterized structurally and thermally by spectral, thermal, and diffraction techniques. The photophysical studies of the target compound in several organic solvents having divergent polarity were also studied, and the results were exhibited. Photometric properties of the complexes were studied using photoluminescence, CIE (Commission internationale de l'éclairage) chromaticity coordinates, correlated color temperature, color purity, Duv, and TLCI (Television Lighting Consistency Index) to verify the applicability of complexes as phosphors. Excellent luminescence property with a high coloring index for (Cu(2NA‐AMG‐2H2O)) opens the advanced avenue for light sources and serves as vital constituents for light‐emitting diodes.

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Recent Advances in Hydrogen Evolution Reaction Using First-Row Transition Metal Complexes as Catalyst

Cited by 3 publications

References 15 publications

Electrochemical Nickel‐Catalyzed Hydrogenation

Electrochemical Nickel‐Catalyzed Hydrogenation

Electrochemical Nickel‐Catalyzed Hydrogenation

Synthesis and photometric properties of efficient white‐emitting phosphor of M‐AMG transition metal complexes for OLED applications

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