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 …

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

Fossil fuels like coal, oil, and natural gases are not renewable on a human time scale and
when combusted they pollute the earth's atmosphere with carbon dioxide. The latter is …

Hydrogen, the most abundant element in the Universe, is considered to be an environmental
friendly energy carrier because its combustion generates water. Nowadays, owing to the …

The concept proposed by Woese and associates in the late 1970s reclassified all living
organisms into three primary kingdoms: eucaryotes, eubacteria, and archaebacteria (127 …

Nickel, atomic no. 28, constitutes 8.5% of the earth's core and about 0.008% of the earth's
crust (139). Average worldwide nickel concentrations have been estimated to be 1.0, g/kg for …

Hydrogenase is the name given to the family of enzymes that catalyze what is seemingly
one of the simplest possible chemical reactions, the interconversion of the smallest …

Electrochemically controlled titrations of the different redox states detected by IR
spectroscopy of Desulfovibrio gigas hydrogenase are reported. This enzyme has in common …

Three types of hydrogenases have been isolated from the sulfate-reducing bacteria of the
genus Desulfobibrio. They differ in their subunit and metal compositions, physico-chemical …

NAD+-reducing [NiFe] hydrogenases are valuable biocatalysts for H2-based energy
conversion and the regeneration of nucleotide cofactors. While most hydrogenases are …