A comparative perspective of electrochemical and photochemical approaches for catalytic H₂O₂ production

Abstract

Recent advances in the design, preparation, and applications of different catalysts for electrochemical and photochemical H2O2 production are summarized, and some invigorating perspectives for future developments are also provided.

Efficient Two‐Electron Oxygen Reduction to Hydrogen Peroxide Promoted by Ag‐7,7,8,8‐Tetracyanoquinodimethane Nanodots/Graphene Hydrogel Hybrid Electrocatalysts

“…Hydrogen peroxide (H 2 O 2 ) is widely used in medical, military, industrial and other technical fields. [1][2][3][4][5] It is also one of the 100 most important chemical feedstocks. The preparation methods of H 2 O 2 include anthraquinone, isopropanol, two-electron oxygen reduction reaction(2e À ORR), etc.…”

Solar-to-hydrogen peroxide energy conversion on resorcinol–formaldehyde resin photocatalysts prepared by acid-catalysed polycondensation

“…Several photocatalysts in the powdered form have been used for the generation of H 2 O 2 13,14 , but almost all of the systems suffer from low efficiency: the solar-to-chemical conversion (SCC) efficiency for the H 2 O 2 generation on recently reported photocatalysts based on a graphitic carbon nitride (g-C 3 N 4 ) arẽ 0.10% (g-C 3 N 4 /PDI: g-C 3 N 4 doped with pyromellitic diimide) 15 , 0.20% (g-C 3 N 4 /PDI loaded with reduced graphene oxide) 16 , 0.26% (g-C 3 N 4 reduced with NaBH 4 ) 17 , and~0.27% (g-C 3 N 4 / PDI loaded with reduced graphene oxide and boron nitride) 18 , respectively. This is because they (i) do not absorb longwavelength light (λ > 500 nm), (ii) show low activity with respect to the oxidation of water (Eq.…”

Linear Paired Electrolysis—Realising 200 % Current Efficiency for Stoichiometric Transformations—The Electrochemical Bromination of Alkenes

“…Accordingly, the optimisation of the linear paired electrolysis was first conducted in a divided cell and later in an undivided cell to determine the efficiency of the coupled processes. In fact, the presence of quinones, such as 3 or anthraquinone, which was reported to facilitate the formation of H 2 O 2 , [8] proved to be effective for the bromination of cyclohexene in the cathode compartment but the effect was marginal, so that the further reactions were conducted in the absence of these quinones (for details, see SI).…”