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 …

The reaction takes place at a specialized metal center that dramatically increases the acidity
of H2 and leads to a heterolytic splitting of the molecule which is strongly accelerated by the …

If the atmosphere of the early Earth was hydrogen-rich, 1 it is reasonable to think that
hydrogenases, the enzymes enabling cells to use molecular hydrogen, were probably …

Mitochondrial complex I powers ATP synthesis by oxidative phosphorylation, exploiting the
energy from ubiquinone reduction by NADH to drive protons across the energy-transducing …

This review describes the functions, structures, and mechanisms of nine nickel-containing
enzymes: glyoxalase I, acireductone dioxygenase, urease, superoxide dismutase,[NiFe] …

The utilization of hydrogen by micro-organisms as a source of reducing power or of protons
as final electron acceptors is mediated by metalloenzymes called hydrogenases. The need …

Many microorganisms, such as methanogenic, acetogenic, nitrogen-fixing, photosynthetic,
or sulfate-reducing bacteria, metabolize hydrogen.[1, 2a] Hydrogen activation is mediated by …

Hydrogenases are abundant enzymes that catalyse the reversible interconversion of H2 into
protons and electrons at high rates. Those hydrogenases maintaining their activity in the …

Nickel is an essential nutrient for selected microorganisms where it participates in a variety
of cellular processes. Many microbes are capable of sensing cellular nickel ion …

The reversible reduction protons to dihydrogen: 2H++ 2e⇌ H2 is deceptively the simplest of
reactions but one that requires multistep catalysis to proceed at practical rates. How the …