The effect of pyridinic- and pyrrolic-nitrogen in nitrogen-doped carbon nanotubes used as support for Pd-catalyzed nitroarene reduction: an experimental and theoretical study

Synthesis, characterization and catalytic studies of N-doped ordered mesoporous carbons and functionalized periodic mesoporous organosilicas

“…They observed that the presence of pyridine-Pd complexes in carbon materials enhances catalytic acitivity and selectivity for hydrogenation of nitroarenes compared to pyrrole-Pd complexes. 61 The small decrease in catalytic activity observed for Pd-N-OMC-500 could be due to a slightly larger particle size as observed from TEM ( Figure 8) and a higher Pd 2+ content as evidenced by XPS analysis (Figure 6).…”

“…60 They proposed that pyrrolic nitrogen functionalities tend to covalently bind with Pd 2+ species, while lone electron pairs from pyridinic N tend to coordinate with vacant sites of Pd 2+ (Scheme 1). 61 These interactions may be responsible for preventing the reduction to Pd 0 .…”

Graphene/pyrrolic-structured nitrogen-doped CNT nanocomposite supports for Pd-catalysed Heck coupling and chemoselective hydrogenation of nitroarenes

“…The metal organic CVD (MOCVD) technique, as outlined in a previous report [43], was used for the deposition of Pd onto the GO, rGO, CNTs, N-CNTs, N-CNTs-OT, G/CNTs, G/N-CNTs and G/N-CNTs-OT carbon supports. About 0.048 g Pd(acac) 2 was mixed with 0.316 g of carbon support, followed by thorough grinding using a pestle and mortar.…”

“…CNTs have been widely employed as Pd catalyst support and this is due to their distinct structural and electronic properties [39]. However, their heteroatoms (such as nitrogen)-doped counterpart (N-CNTs) have been reported to display excellent support for Pd NPs in C-C reactions [40][41][42] and nitroarenes hydrogenation [43,44] through enhanced Pd-N-CNTs interaction. This is because nitrogen atom can activate the adjacent carbon atoms due to its strong electron affinity to nitrogen, which enhances Pd metal adsorption [45].…”

Synthesis, characterization and catalytic studies of N-doped ordered mesoporous carbons and functionalized periodic mesoporous organosilicas

“…They observed that the presence of pyridine-Pd complexes in carbon materials enhances catalytic acitivity and selectivity for hydrogenation of nitroarenes compared to pyrrole-Pd complexes. 61 The small decrease in catalytic activity observed for Pd-N-OMC-500 could be due to a slightly larger particle size as observed from TEM ( Figure 8) and a higher Pd 2+ content as evidenced by XPS analysis (Figure 6). high surface areas, large pore volumes and tunable pore sizes.…”