Carbonate, photochemical reduction formaldehyde

Khan MMT, Rao NN, Chatterjee D. A novel photosynthetic mimic reaction catalysed by K[Ru(H-EDTA)C1]-2H20 reduction of carbon dioxide to formate and formaldehyde in the presence of an aqueous suspension of Pt-CdS-Ru02. / Photochem Photobiol A Chem 1991 60 311-18. 

Non-Diamine Chemical Development Stains Host of the non-diamine chemical development silver stains were developed by adapting photographic photochemical protocols (22-26). These stains rely on the reaction of silver nitrate with protein sites in acidic conditions, followed by the selective reduction of ionic silver by formaldehyde in alkaline conditions. Sodium carbonate and/or hydroxide and other bases are used to maintain an alkaline pH during development. Formic acid, produced by the oxidation of formaldehyde, is buffered by the sodium carbonate (27). 

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