10 research outputs found
Fragments of Layered Manganese Oxide Are the Real Water Oxidation Catalyst after Transformation of Molecular Precursor on Clay
Treated nanolayered Mn oxide by oxidizable compounds A strategy to improve the catalytic activity toward water oxidation
Herein,
we investigate the effect of post-treatment of nanolayered manganese
oxide by different inorganic and organic compounds. We use the fact
that nanolayered manganese oxides are among the strongest naturally
occurring oxidants, capable of oxidizing a wide range of organic molecules.
Post-treatment of the synthetic Mn oxides with oxidizable compounds
increases the cerium(IV)-driven water oxidation catalyzed by treated
layered manganese oxides more than 25 times. On the basis of X-ray
absorption investigations, we attribute this effect to the increased
amount of manganese(III) ions. This finding can explain some puzzles
in water oxidation by manganese oxides and may help to advance toward
an efficient design strategy of water-oxidizing catalyst in artificial
photosynthetic systems