These research findings confirm that the synthesized heteroleptic complexes can be served as homogeneous molecular electrocatalysts of hydrogen production with high tolerance. Intriguingly, excellent electrochemical stability of 1 - 5 in hydrogen generation is observed, which can be acted as potential candidates of electrocatalysts with high tolerance. On the basis of experiment and theoretical calculations, an ECEC electrocatalytic mechanism for hydrogen production is proposed. Density functional theory (DFT) calculations display that the electron-withdrawing substituent on the 1,2-diarylethylene-1,2-dithiolate ligand can reduce the energy levels of highest occupied molecular oribital (HOMO) and lowest unoccupied molecular oribital (LUMO) of the complex, leading lower negative redox and catalytic potentials. The faradaic efficiencies (FE) of 66.15-98.20 % and turnover numbers (TON) of 13.16-35.92 are achieved under the CPE experiments over 18 h periods at −2.00 V vs Fc+/Fc, respectively. Shot in South Africa and directed by Jude Engees Okoye. The twin boys are really enjoying the pleasures of hard work. The turnover frequencies (TOF) and overpotentials () for hydrogen evolution by 1 - 5 (0.25 mM) in DMF are estimated to be 423-894 s-1 and 0.91-1.02 V with 67.32 mM TFA, respectively. P-Square drops yet another breathtaking visuals for their newest smash hit single Taste the Money (Testimony). ![]() ![]() The electrochemical behavior and electrocatalytic hydrogen-evolving activity were investigated using trifluoroacetic acid (TFA) as the proton source in combination with cyclic voltammetry (CV) and controlled potential electrolysis (CPE). The crystal structure analysis of 2 and 4CH2Cl2 indicates the two complexes have almost perfect S2P2 square planar coordination environment defined by the 1,2-diarylethylene-1,2-dithiolate and bis(diphenylphosphine)amine ligands. Stimulated by the structural feature of the -hydrogenases active sites, five new heteroleptic 1,2-bis(p-substitutedphenyl)ethylene-1,2-dithiolate nickel complexes containing N-(p-methoxyphenyl)-bis(diphenylphosphine)-amine ligand, Ni (R = CH3O (1), CH3 (2), H (3), Br (4), and F (5)), were synthesized and characterized.
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