Photosynthesis of hydrogen peroxide from air, water and oxalate

What is it about?

A new organic photocatalyst of oxygen to hydrogen peroxide reduction is explored. The catalyst consists of an electron-donor pyrrole fragment connected to an electron-acceptor isoquinolinium moiety. Such combination secures the photoredox activity of the catalyst in promoting the reduction of molecular oxygen to hydrogen peroxide with oxalate ions upon irradiation with blue light, the achieved hydrogen peroxide concentration approaching mM level.

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Why is it important?

Hydrogen peroxide is a green and cheap oxidant, but it is currently manufactured by a hazardous anthraquinone process. A photosynthesis of hydrogen peroxide from air, water and organic wastes, like oxalate ions, would alleviate the environmental burden.