Hydrogen-free hydrogenation of nitrobenzene via direct coupling with cyclohexanol dehydrogenation over ordered mesoporous MgO/SBA-15 supported Cu nanoparticles

Abstract

Coupling of nitrobenzene and cyclohexanol over mesoporous Cu/MgO-SBA15 exhibited better conversion of 89% cyclohexanol, 82% nitrobenzene with remarkable yields of cyclohexanone (83%) and aniline (75%). The catalyst has stable activity up to 30 h.

Synthesis and characterization of Cu(OH)2-NWs-PVA-AC Nano-composite and its use as an efficient adsorbent for removal of methylene blue

“…S7 a, the XPS of Cu 2p before adsorption display distinct peaks at B.E. values of 934.6 and 954.4 eV represents the Cu 2p 3/2 and Cu 2p 1/2 respectively 32 . These characteristic XPS peaks confirm the presence of Cu 2+ species in the form of Cu(OH) 2 on the surface of Cu(OH) 2 -NWs-PVA-AC Nano-composite.…”

Fabrication of a PdCu@SiO2@Cu core–shell–satellite catalyst for the selective hydrogenation of acetylene

“…For Cu 2p, the binding energies at 952.4 and 932.6 eV could be assigned to Cu 0 , but they were apparently lower than those of monometallic Cu (952.8 and 933.0 eV). 39,40 In the case of Pd 3d, the binding energies at around 340.4 and 335.1 eV referred to Pd 0 , and were quite close to those of metallic Pd (340.3 and 335.0 eV). 41,42 This evidenced that Cu accepted electrons from Pd in the Pd 25 Cu 75 and PdCu particles due to the formation of nanoalloys.…”

Porphyrin N-Pincer Pd(II)-Complexes in Water: A Base-Free and Nature-Inspired Protocol for the Oxidative Self-Coupling of Potassium Aryltrifluoroborates in Open-Air

“…Hence, the present N-pincer Pd(II)-porphyrin catalyzed process is advantageous over the reported aryltrifluoroborate self-couplings. In view of global sustainability, the elimination/decrease of the application of volatile organics, the use of benign/naturemimicking catalysts, and conducting the chemical reactions at ambient conditions can make a significant contribution [74][75][76][77][78]. A comparison of reported self-coupling procedures of aryltrifluoroborates [39][40][41][42][43] is shown in Table 3 and evidences the clear merits of the present nature-mimicking method over the reported protocols using Pd NPs/Te-Dps [39], Au nanoclusters:poly(N-vinyl-2-pyrrolidine) [40], Pd(OAc)2-electrolysis [41], Cu(OAc)2-ultra sound [42], and Pd NPs@Al(OH)3 [43] which require organic solvent [41], base/additive [39][40][41][42][43], heating [39][40][41][42][43], long process time [39,40,42,43] or suffer from low biaryl yield with some aryltrifluoroborates [39][40][41][42][43].…”

“…Hence, the present N-pincer Pd(II)-porphyrin catalyzed process is advantageous over the reported aryltrifluoroborate self-couplings. In view of global sustainability, the elimination/decrease of the application of volatile organics, the use of benign/nature-mimicking catalysts, and conducting the chemical reactions at ambient conditions can make a significant contribution [74][75][76][77][78].…”