Photoelectrocatalysis for high-value-added chemicals production

Carbon quantum dots aqueous solution as electrolyte for H2O2 production based on photoelectrochemical water splitting

“…Hydrogen peroxide (H 2 O 2 ) production on an anode, associated with H 2 generation on a cathode, adds much more value for photoelectrochemical (PEC) water splitting. [1][2][3][4] Until now, many efforts have been devoted to water oxidative H 2 O 2 production, [5][6][7][8][9][10][11][12][13][14][15][16] but practical and effective protocols are still difficult to come by. This dominantly roots from the challenging issue of suppressing the competitive O 2 evolution, because the two-electron-mediated H 2 O 2 generation (i.e., H 2 O 2 /H 2 O, E °= 1.76 V) is less thermodynamically favorable than the subsequent four-electron O 2 evolution reaction (OER) (i.e., O 2 /H 2 O, E °= 1.23 V).…”

Bromide-Mediated Photoelectrochemical Epoxidation of Alkenes Using Water as an Oxygen Source with Conversion Efficiency and Selectivity up to 100%

“…Only recently, the PEC process for organic synthesis such as the oxidation of alcohols and biomass feedstocks has aroused researchers’ intense interest. − For instance, Cha and Choi explored the selective PEC oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid at a BiVO 4 photoanode with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) as a redox mediator . Berlinguette and co-workers reported a similar system that operated in organic media.…”

Understanding (photo)electrocatalysis for the conversion of methane to valuable chemicals through partial oxidation processes

“…88,89 Metal chalcogenide, C 3 N 4 , and metal carbide are also good candidates for visible light PEC CH 4 oxidation because the outstanding photocatalytic activity was already reported for the partial oxidation of CH 4 in slurry-type systems. 90,91 The modication of the bulk and surface properties of semiconducting materials and cocatalysts or the introduction of highly active photocatalysts and electrocatalysts in PEC systems should be helpful to advance the design of the PEC device with high performance under sunlight.…”