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Hydrogen Production from Formic Acid and Formaldehyde over Ruthenium Catalysts in Water.

08:00 EDT 24th March 2020 | BioPortfolio

Summary of "Hydrogen Production from Formic Acid and Formaldehyde over Ruthenium Catalysts in Water."

Water-soluble ruthenium complexes [(η-arene)Ru(κ-L)] ( = 0,1) (-) ligated with pyridine-based ligands are synthesized, and the molecular structure of the representative complex is confirmed by X-ray crystallography. The studied complexes are employed for the catalytic dehydrogenation of formic acid in water. Screening of these complexes inferred that [(η-CH)Ru(κ-NOH-)Cl] ( = pyridine-2-ylmethanol) outperformed others with an initial turnover frequency of 1548 h. Complex also exhibited high stability in water and can be recycled up to seven times with a total turnover number of 6050. In addition to formic acid dehydrogenation, also catalyzed the conversion of formaldehyde to hydrogen gas in water under base-free conditions. The effects of temperature, pH, formic acid, and catalyst concentration on the reaction kinetics are investigated in detail. Mass and NMR based mechanistic investigations inferred the presence of several important intermediate species, such as ruthenium-formate species and ruthenium-hydride species , involved in the catalytic dehydrogenation reaction. Moreover, the molecular structure of a diruthenium species is also authenticated by single-crystal X-ray crystallography.

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Name: Inorganic chemistry
ISSN: 1520-510X
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Medical and Biotech [MESH] Definitions

ESTER derivatives of formic acid with the formula H-COO-R.

Unstable isotopes of ruthenium that decay or disintegrate emitting radiation. Ru atoms with atomic weights 93-95, 97, 103, and 105-108 are radioactive ruthenium isotopes.

Inorganic compounds that contain ruthenium as an integral part of the molecule.

Peroxidases that utilize ASCORBIC ACID as an electron donor to reduce HYDROGEN PEROXIDE to WATER. The reaction results in the production of monodehydroascorbic acid and DEHYDROASCORBIC ACID.

An inorganic dye used in microscopy for differential staining and as a diagnostic reagent. In research this compound is used to study changes in cytoplasmic concentrations of calcium. Ruthenium red inhibits calcium transport through membrane channels.

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