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首页> 外文期刊>Catalysis science & technology >Electrochemical water oxidation by a copper complex with an N-4-donor ligand under neutral conditions
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Electrochemical water oxidation by a copper complex with an N-4-donor ligand under neutral conditions

机译：电化学氧化水铜复杂的N-4-donor中性配体条件

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摘要

Herein, electrochemical water oxidation catalyzed by a copper(ii) complex [Cu-II(H2L)](NO3)(2) with the redox-active salophen-like N-4-donor ligand N,N '-bis-(1H-imidazol-4-yl)methylidene-o-phenylenediamine is demonstrated. Oxygen evolution with a high turnover frequency of 11.09 s(-1) and a low onset overpotential of only 580 mV is achieved in neutral phosphate buffer solution, and [Cu-II(H2L)](2+) is confirmed as an efficient molecular water oxidation catalyst with long-term stability. The results of electrochemical tests provide evidence that the Cu center undergoes a water nucleophilic attack process and participates in the catalytic cycle. The subsequent one-step proton-coupled electron transfer (PCET) process of the Cu center and the two-step PCET process of the ligand are both critical for efficient water oxidation. This work indicates that the ligand assisted catalytic cycle is a favorable method for the accumulation of intermediate species that account for electrochemical water oxidation.
机译：在此,电化学氧化催化水由铜(ii)复杂[Cu-II (H2L)(三)(2)的redox-active salophen-like N-4-donor配体N, N

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