One-pot organometallic synthesis of alumina-embedded Pd nanoparticles

Abstract

Herein we report a one pot organometallic strategy to access alumina-embedded Pd nanoparticles. Unexpectedly, the decomposition of the organometallic complex tris(dibenzylideneacetone)dipalladium(0), Pd(dba), by dihydrogen in the presence of aluminum isopropoxide, Al(iPrO), and without extra stabilizers, was found to be an efficient method to generate a Pd colloidal solution. Careful characterization studies revealed that the so-obtained Pd nanoparticles were stabilized by an aluminum isopropoxide tetramer and 1,5-diphenyl-pentan-3-one, which was produced after reduction of the dba ligand from the organometallic precursor. Moreover, calcination of the obtained nanomaterial in air at 773 K for 2 h resulted in a nanocomposite material containing Pd nanoparticles embedded in AlO. This stabilization strategy opens new possibilities for the preparation of transition metal nanoparticles embedded in oxides.

NIR-enhanced multi-mode catalytic activity over Pd nanocrystals sandwiched within magnetic polydopamine hollow spheres

“…First, the absorbance of h-Fe 3 O 4 @Pd/PDA suspensions of different concentrations (20,40,60,80 and 100 μg mL −1 ) at 808 nm was determined. Secondly, 1 mL of h-Fe 3 O 4 @Pd/PDA with different concentrations was added into a 1.5 mL centrifuge tube, and the temperature changes during heating and cooling of the nanocomposites under NIR light (808 nm, 2.0 W cm −2 ) were recorded by an infrared camera every 15 s for 6 min.…”

“…[13][14][15] Multifunctional nanoplatforms received increasing research interest in carrying nanocatalysts since they could maintain good dispersion, prevent the leaching of nanocatalysts, and endow them with easy separation characteristics. 16,17 To improve the stability and efficiency of Pd nanocatalysts, a large number of nanocarriers, such as SiO 2 , 18 metal-organic frameworks, 19 metal oxides, 20,21 polymers, 22 and Fe 3 O 4 , [23][24][25][26][27][28] have been applied for catalytically active metals. These non-toxic, easy to recover, and costeffective nanoplatforms guaranteed high efficiency for heterogeneous catalysis.…”

The Fast Formation of a Highly Active Homogeneous Catalytic System upon the Soft Leaching of Pd Species from a Heterogeneous Pd/C Precursor

“…Transition metal catalysts play an important role in organic synthesis, polymer science, the production of biologically active compounds, and industry developments [1][2][3]. The synthesis and modification of monometallic nanocatalysts [4][5][6][7][8][9][10][11], bimetallic nanocatalysts [12][13][14][15], and mixed metal-nonmetallic nanocatalysts [16][17][18] are actively investigated in recent years. In particular, heterogeneous carbon-supported metal nanoparticle catalysts (M/C) have been applied in the fine chemical industry [19], energy research [20], and metal-catalyzed reactions in organic synthesis [21][22][23].…”