Abstract:Photocatalytic organic conversion is a crucial process in the hydrogenation of nitroarenes, but harsh reaction conditions such as long reaction time, high hydrogen pressure, and organic medium still need to be considerably overcome under visible-light irradiation. Here, we have constructed a transition metal oxide photocatalyst by embedding low-cost Cu2O with strong visible-light absorption into hierarchically hollow SiO2 sphere (SiO2-Cu2O@SiO2) that can suppress the escape of photogenerated atomic hydrogen an… Show more
“…For applied potential more negative than − 0.5 V (η = 0 V for hydrogen reduction), the current sharply increased, which can be attributed to the irreversible reduction of nitrobenzene involving hydrogen transfer. A similar behavior was observed for Cu electrodes [48][49][50], thus we can assume that Cu sites actively participate in the nitrobenzene hydrogenation process either by acting as the adsorption site or by providing the adsorbed hydrogen species required for the hydrogenation process.…”
Section: Nitrobenzene Hydrogenationsupporting
confidence: 78%
“…Among these, electrocatalysis is the least studied and the one presenting more difficulties, especially regarding the conversion yields, selectivity, stability of the materials and scalability. A variety of materials and methods have been used to overcome these problems, and the best results have been obtained using copper (Cu) and its alloys [48,49], or alloys with noble metals (Pt, Pd) [50] in different morphologies. These electrocatalysts provide relatively large potential window and slow hydrogen evolution kinetics.…”
“…For applied potential more negative than − 0.5 V (η = 0 V for hydrogen reduction), the current sharply increased, which can be attributed to the irreversible reduction of nitrobenzene involving hydrogen transfer. A similar behavior was observed for Cu electrodes [48][49][50], thus we can assume that Cu sites actively participate in the nitrobenzene hydrogenation process either by acting as the adsorption site or by providing the adsorbed hydrogen species required for the hydrogenation process.…”
Section: Nitrobenzene Hydrogenationsupporting
confidence: 78%
“…Among these, electrocatalysis is the least studied and the one presenting more difficulties, especially regarding the conversion yields, selectivity, stability of the materials and scalability. A variety of materials and methods have been used to overcome these problems, and the best results have been obtained using copper (Cu) and its alloys [48,49], or alloys with noble metals (Pt, Pd) [50] in different morphologies. These electrocatalysts provide relatively large potential window and slow hydrogen evolution kinetics.…”
“…54,55 There is a strong Auger peak in the region 562 to 790 eV related to the Cu 2 O phase conrming the growth of Cu 2 O rather than metallic Cu that shows the Auger peak at relatively lower binding energy. [55][56][57][58][59] The Cu 2p core level spectra of CuP3T5, CuP4T5 and CuP5T5 samples are shown in Fig. 4d-f, respectively.…”
Section: Model and Computational Detailsmentioning
Coating electrocatalytic material on a substrate without using a binder is a preferable method to prepare electrodes for CO2 reduction. In this work, nanostructured film electrodes are prepared by electrodepositing...
“…2(B) shows the high resolution XPS spectrum of the Cu 2p peak of Cu 2 OQDs@MOF-801 where Cu 2p 3/2 and Cu 2p 1/2 peaks are located at 933.66 and 953.62 eV, respectively, suggesting the Cu 1+ oxidation state and confirms the formation of the Cu 2 O into Cu 2 OQDs@MOF-801 nanocomposite, which is in close agreement with the previously reported data. 57…”
For the first time, Cu2O QDs were immobilized inside the MOF-801 via double solvents method (DSM) combined with an in situ reduction route (ISRR) for the synthesis of Cu2OQDs@MOF-801 nanocomposite using a simple and low cost route.
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