Highly dispersed nickel and palladium nanoparticle silica aerogels: sol–gel processing of tethered metal complexes and application as catalysts in the Mizoroki–Heck reaction

2-Aminophenyl diphenylphosphinite as a new ligand for heterogeneous palladium-catalyzed Heck–Mizoroki reactions in water in the absence of any organic co-solvent

“…39 The formation of the Pd(0) catalyst was also supported by the XRD of the powder obtained by drying of the aqueous mixture of Pd(OAc) 2 and the ligand at (111),(200),(220) and (311) crystallographic planes as illustrated in Figure 4. 40 The stability of the ligand towards basic conditions was also studied. For this purpose, a mixture of 2-aminophenyl diphenylphosphinite (2 mmol) with of NaOH (3 mmol) in H 2 O (5 mL) was refluxed for 3 h. After workup of the reaction mixture, the intact aminophosphinite was isolated over 97% yield.…”

Synthesis and characterisation of ambient pressure dried composites of silica aerogel matrix and embedded nickel nanoparticles

“…Their respective BET surface areas were 537.09 m 2 /g, 679.74 m 2 /g, and 590.78 m 2 /g using the nitrogen gas adsorption at 77 K. We have also characterised the surface area of NiNPs on its own and it is 10.25 m 2 /g, this is much smaller than measured composite NiNPS-silica aerogel material synthesised in this work. To compare the properties of the NiNPs/SiO 2 aerogels made by supercritical drying method in the past, we note that the reported surface area was in the range of 439-940 m 2 /g [18,19] which is similar to our aerogels. The STEM image of NS1 shown in Fig.…”

Heterogeneous Pd catalysts supported on silica matrices

“…97 The obtained materials were tested in the Heck reaction of iodobenzene with ethyl acrylate, styrene and methyl vinyl ketone and compared with carbon aerogels loaded with Pd. In general, silicabased catalysts were found to be more active and stable.…”