Application of a mononuclear nickel complex containing mnt ligand as a catalyst for electrocatalytic hydrogen production

Abstract

The invention belongs to the field of catalyst preparation. Specifically, it is the application of a mononuclear nickel complex as an electrocatalytic hydrogen production catalyst. The electrocatalytic hydrogen production catalyst is N-substituted bis(diphenylphosphino)ammonium (R-PNP). and maleonitrile dithiolate (mnt 2‑ ) ligand, this complex is a mononuclear nickel complex formed by connecting R-PNP and maleonitrile dithiolate ligands to metal nickel atoms. Its chemical structure is as follows: Nickel complexes exhibit efficient electrocatalytic hydrogen production activity in acidic media. The mononuclear nickel complex of the present invention has the advantages of simple synthesis method, mild reaction conditions, high yield, etc., and can be suitable for a series of N-substituted bis(diphenylphosphino)amine-containing and maleonitrile diamines with catalytic hydrogen production performance. The synthesis of mononuclear nickel complexes with thiolate ligands has potential application value in hydrogen energy development.

Description

technical field [0001] The present invention relates to the technical field of catalyst preparation, specifically a kind of N-substituted bis (diphenylphosphino) ammonia (R-PNP) and maleonitrile dithiolate (mnt 2- ) ligand and metal nickel atom linking a kind of metal complex as the application of electrocatalytic hydrogen production catalyst. Background technique [0002] With the rapid development of social economy, the energy crisis has become increasingly prominent, so it is becoming more and more important to develop a catalyst with high-efficiency hydrogen production activity. As we all know, the developed natural resources on the earth are basically non-renewable and often polluting resources. Hydrogen energy has the characteristics of high combustion calorific value and no pollution, which makes the development of hydrogen energy particularly highly valued by governments and scientists of various countries. Hydrogen production pathways mainly include fossil fuel cr...

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Problems solved by technology

[0003] N-substituted bis(diphenylphosphino)ammonia (R-PNP) is a novel class of aza-chelate bisphosphine ligands, which can be used for mixed ligands by introducing thiolate or dithiolate ligands. Synthetic and structural studies of the mononuclearnickel(II)ethanedithiolate complexes with chelating N-substituted bis(diphenylphosphanyl)amine. Polyhedron , 2015,85:482-487; X.F.Liu.Condensation reactions of the mononuclear nickel(II)complexes[RN(PPh 2 ) 2 ]NiCl 2 with 1,2-ethanedithiol or 1,3-propanedithiol. Inorg.Chim.Acta ,2014,421:10-17; L.C.Song,J.P. Li,Z.J.Xie,et al.Synthesis,structural characterization,and electrochemical properties of dinuclear Ni / Mn model complexes for active siteof[NiFe]-hydrogenases. Inorg. Chem. ,2013,52(19):11618-11626), but there are relatively few studies on the catalytic hydrogen production performance of these metal complexes. Gan et al. found that: The mononuclear nickel complex (dppe)Ni(bdt) of the dithiophenate ligand has no electrocatalytic hydrogen production activity in either acetic acid or p-toluenesulfonic acid medium (L.Gan, T.L.Groy, P.Tarakeshwar, et al, A nickel phsphine complex as fast and efficient hydrogen production catalyst. J.Am.Chem.Soc. , 2015, 137(3), 1109-1115)

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