A highly active and chemoselective assembled Pt/C(Fe) catalyst for hydrogenation of o-chloronitrobenzene

UV Light-Assisted Synthesis of Highly Efficient Pd-Based Catalyst over NiO for Hydrogenation of o-Chloronitrobenzene

“…Another aspect showed a desired increase of o -CAN as the aimed product with the increase in the o -CNB/Pd ratio. Fortunately, the observed results are comparable to the commercial Pd/C [ 42 , 43 ].…”

Insitu synthesis of Ru/RGO nanocomposites as a highly efficient catalyst for selective hydrogenation of halonitroaromatics

“…The shi reveals that the electron transfer may occur between the Ru nanoparticles and the oxygen of RGO, and the high electronegativity of oxygen is expected to reduce the electron density of the Ru atoms and result in an electron-decient state of the Ru nanoparticles in the Ru/RGO catalyst. 15 Additionally, the C1s spectra of RGO could be deconvoluted into four peaks at 284.6, 285.8, 287.7 and 289.6 eV, which correlate to C-C, C-OH, C (epoxy/alkoxy), and C]O groups, respectively. 26 The intensity of the C1s sp 3 -C peak is higher compared to the C1s sp 2 -C peaks due to the formation of more C-H coupling and less conjugated p systems through the reduction by atomic hydrogen.…”

“…Moreover, it is generally recognized that the side reaction of hydrodehalogenation of aromatic halides could be suppressed if the nanoparticles are situated in electron-decient states, which weakens the extent of electron feedback from the Ru particles to the aromatic ring in p-CAN. 15,30 According to the XPS data of the Ru/RGO catalyst, the binding energy of the Ru3d 5/2 level in the Ru/RGO catalyst (280.7 eV) is higher than that of the standard zero-valent state of Ru (280.2 eV), suggesting that the Ru particles in the Ru/ RGO catalyst are in a much more electron-decient state. Therefore the high selectivity of p-CAN over the Ru/RGO catalyst is primarily derived from the electron-decient state of the Ru due to the electronic effect of the Ru nanoparticles with the functional groups on the surface of the RGO.…”

“…Nevertheless, the presence of unfavored C-Cl bond hydrolysis during this process not only limits the selectivity for desired amines but also hinders the application of scientic experiments into industrial production. To resolve this issue, tremendous effort has been dedicated to the development of cost-effective metal catalysts such as Pd, [2][3][4][5][6] Pt, [7][8][9][10][11][12][13][14] Ru, [15][16][17][18] and Ir [19][20][21] for the hydrogenation of halonitroaromatics. With respect to the catalytic performance, palladium has the highest catalytic activity but it is associated with serious dechlorination; ruthenium seems an attractive alternative with high selectivity and low cost, but its implementation is beset with low activity.…”

Preparation and Catalytic Performance of Metal-Rich Pd Phosphides for the Solvent-Free Selective Hydrogenation of Chloronitrobenzene

“…However, the highly selective synthesis of aromatic haloamines remains an unsolved challenge on almost all kinds of metal catalysts, such as Pt, Pd, Ni, Ru, and Au [7,8]. Numerous research efforts have been devoted to the suppression of the hydrodehalogenation side reaction, such as modulating metal particle size [9], adding organic additives [10][11][12][13], synthesizing metal complexes [14][15][16], adding metal promoters [7,17,18], and modifying the interaction between metal active components and metallic oxide supports [19]. Recently, co-based catalysts as representatives of non-noble metals have been proposed, and the catalytic performance of the hydrogenation of halonitrobenzenes has been explored [20].…”