Conspectus The hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and
oxygen reduction reaction (ORR) are involved in biological and artificial energy conversions …

Gases like H2, N2, CO2, and CO are increasingly recognized as critical feedstock in “green”
energy conversion and as sources of nitrogen and carbon for the agricultural and chemical …

Heterogeneous thermocatalytic hydrogenation is widely believed to occur via co-adsorption
of H2 and other reactants, but in aqueous phase an ionic or electrochemical mechanism …

The prototypical hydrogen-producing enzyme, the membrane-bound formate hydrogenlyase
(FHL) complex from Escherichia coli, links formate oxidation at a molybdopterin-containing …

[FeFe] hydrogenases, metalloenzymes catalyzing proton/dihydrogen interconversion, have
attracted intense attention due to their remarkable catalytic properties and (bio-) …

Hydrogen oxidizing bacteria (HOB), a type of chemoautotroph, are a group of bacteria from
different genera that share the ability to oxidize H 2 and fix CO 2 to provide energy and …

Mitochondrial complex I is a redox-driven proton pump that generates proton-motive force
across the inner mitochondrial membrane, powering oxidative phosphorylation and ATP …

The universe of known biological FeS clusters is constantly enlarging. Besides the
conventional, well described [2Fe–2S],[3Fe–4S] and cubane [4Fe–4S] clusters, novel …

The environmentally friendly production of H2 is one of the major challenges that society has
to face in the next decades, as H2 is considered as a promising energy carrier. By taking …

Several metalloenzymes, including [FeFe]-hydrogenase, employ cofactors wherein multiple
metal atoms work together with surrounding ligands that mediate heterolytic and concerted …