Synthetic organometallic models of iron-containing hydrogenases as molecular electrocatalysts for hydrogen evolution or oxidation

Main advances and trends in the development of synthetic analogues of natural iron-containing hydrogenases are analyzed and summarized. The recently synthesized structural and functional analogues of $[\mathrm{FeFe}]$-hydrogenases are described systematically. Some examples of $[\mathrm{NiFe}]$-hydrogenases and the data on their catalytic activity in hydrogen evolution and oxidation reactions in different media, including water, are considered. The extensive potential of this rapidly developing interdisciplinary research area, covering methods of organic and physical chemistry, electrochemistry and biochemistry is showcased. Particular attention is paid to modern approaches to the evaluation of catalytic efficiency of model complexes and to problems of comparing the activities of catalysts.
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