H2 generation and sulfide to sulfoxide oxidation with H2O and sunlight with a model photoelectrosynthesis cell

Solar-Driven Reduction of Aqueous Protons Coupled to Selective Alcohol Oxidation with a Carbon Nitride–Molecular Ni Catalyst System

“…Replacing the water oxidation half-reaction with valuable substrate oxidation reactions would bypass O 2 production and enable the synthesis of a high value organic chemical, a so-called solar chemical, in addition to the solar fuel H 2 in a closed redox cycle. 10 A useful process is the selective oxidation of benzyl alcohols to carbonyl compounds, which is a fundamental reaction both in the laboratory and on an industrial scale. For example, carbonyl derivatives such as aldehydes and ketones are widely used as precursors in the pharmaceutical and fragrance industries and for complex syntheses.…”

Sulfur‐Center‐Involved Photocatalyzed Reactions

“…In addition, O-methyl-O-ethyl acetal 182 was isolated in 21 %y ield [Eq. (69)]. T hese results reveal the alcohol-trappingm echanism during the acetal formation.…”

“…[67] The Oxygenation of Sulfides Since 1962, the photo-oxidation of sulfidesh as been extensively studied, but with energy-inefficient light sources, such as halogen lamps and Xenon lamps. [68] Recently,l ow-wattage condensed fluorescent lamps (CFLs), light-emitting diodes (LEDs), and photoelectrosynthesis model cells [69] have been used to realize the oxygenation of sulfide. Distinguished by active oxygen species, the general photo-oxygenation modes of sulfide are shown in Scheme 43.…”

Light driven styrene epoxidation and hydrogen generation using H2O as an oxygen source in a photoelectrosynthesis cell

“…11,46 However, in our case, catalytic cationic species present in solution would adsorb at the surface of the Nafion ® film blocking the membrane and sequestering the catalyst. To avoid this, we have deposited a film of poly(3,4-ethylenedioxythiophene) (PEDOT) 47 on the surface of Nafion whereas the cathodic compartment contains the same solution in the absence of the catalyst.…”

“…The employment of hydrogen peroxide is an attractive option both on environmental and economic grounds [4][5][6][7] giving just water as a byproduct. Another option is to use water as the source of oxygen for the epoxidation reaction with the formation of hydrogen as a valuable side product as indicated in the equation below, 8 which involves the input of 37.35 Kcal mol -1 given its uphill thermodynamics that can be provided thermically 9,10 or photochemically 11 with sunlight. This strategy also benefits from the formation of hydrogen as a byproduct that is also a clean energy vector.…”