Photocatalytic oxygen reduction to hydrogen peroxide over copper doped graphitic carbon nitride hollow microsphere: The effect of Cu(I)-N active sites

Production of Hydrogen Peroxide by Photocatalytic Processes

“…[63] As an example of metal doping of g-C 3 N 4 ,Huetal. [64] fabricated hollow copper-doped g-C 3 N 4 microspheres through at emplate-assisted method. The copper-doped g-C 3 N 4 photocatalyst showed am uch higher production of H 2 O 2 (up to 4.8 mmol L À1 )t han bare g-C 3 N 4 (0.45 mmol L À1 ) ( Figure 11 a), which could be attributed to the decreased band gap (Figure 11 b) and enhanced separation rate of the electrons and holes after Cu doping.…”

“…Moon et al [66] reported an in situ incorporation of potassium, phosphorus,a nd oxygen into ag -C 3 N 4 matrix through the solid-state thermal polymerization of melamine in the presence of dibasic potassium phosphate (KPD,K 2 HPO 4 ). Theh eteroelements on the g-C 3 N 4 matrix increased the lifetime of the transient species to the picosecond range, [64] with permission. [64] Copyright 2018 Elsevier.d )UV/Vis spectra, e) H 2 O 2 production,a nd f) AQY of bare CN and KPF-CN.R eprinted from Ref.…”

Post‐formation Copper‐Nitrogen Species on Carbon Black: Their Chemical Structures and Active Sites for Oxygen Reduction Reaction

“…Moreover,t he introduced Cu and Na toms in the carbon matrix can form CuÀNc oordinated sites and the formed CuÀNc enters are able to act as an "electront ransfer bridge" to facilitate the electron transfer from the Cu doping centers to the adsorbed molecular O 2 . [11] As ar esult,t he doped Cu species can also directly serve as actives ites to activate O 2 .L ately,B ao and co-workers [12] In this work, we proposed ar ational and economic synthesis strategyf or Cu-N-C catalysts through CuÀN x moiety decoration of carbon black (Vulcan XC-72, Cabot), by simple annealing of am ixture of the carbon, cuprous chloride, and ammonia water, as Cu and Ns ources, at 500 8C. This synthesis methods eparates the fabrication of pyrolytic carbon from the generation of active CuÀNb onds, which avoids complex pyrolysis reactions.…”

Efficient in situ generation of H2O2 by novel magnesium–carbon nanotube composites

“…1,2 As a result, H 2 O 2 has been widely employed in chemical synthesis, energy conversion, medical disinfection, and refractory wastewater treatment. [3][4][5] Currently, hydrogen peroxide is industrially produced by the anthraquinone route, and concentrated H 2 O 2 (70 wt%) is obtained by extraction. 6 Nevertheless, the anthraquinone process is not green due to its complexity and the requirement for a signicant amount of energy combined with substantial waste generation.…”

“…Thus, novel and low-cost methods for the in situ generation of H 2 O 2 in solution are highly desirable for many application elds. 3,10,11 H 2 O 2 is oen directly synthesized by the reaction between H 2 and O 2 , which is catalyzed by noble metals. However, this process has several drawbacks, including the potential explosiveness of the gas mixture, the elevated cost of precious catalysts and the low solubility of O 2 /H 2 in water.…”