Size Control and Catalytic Activity of Highly Dispersed Pd Nanoparticles Supported on Porous Glass Beads

Abstract

This paper presents a novel in situ method to prepare monodispersed palladium nanoparticles supported on porous glass beads with an egg-shell structure at room temperature. This method integrates two processes of ion exchange and reduction in one step just by changing the solvent from water to alcohol. The monodispersed Pd nanoparticles around 3.75 nm in diameter with a face-centered cubic structure have been successfully prepared. The adsorption capacity for palladium reached 55.00 ± 0.55 mg/g in ethanol, which was 26 times larger than that in water. These Pd nanoparticles supported on porous glass beads showed an excellent catalytic performance through the hydrogenation of cyclohexene. In addition, this in situ method was also successfully applied to prepare monodispersed silver and gold nanoparticles supported on porous glass beads. Overall, this facile method provided an alternative for preparing a supported nanoparticle catalyst in a green way.

Surfactant-assisted morphological tuning of porous metallic silver sponges: facile synthesis, characterization and catalytic performance

“…Hierarchically porous materials with multi-scale porous structure, generally of micro-meso-macroporous nature, have attracted great attention recently due to their dynamic properties such as low density, considerable thermal conductivity [10], gas permeability, bio-filtration capability [11,12] and adsorption [13,14]. Hence, such materials are extensively used in heterogeneous catalysis [15][16][17][18][19][20][21][22], biosensor technology [23,24], electrochemical supercapacitors [25][26][27][28][29], tissue engineering [30], photonic crystals, fuel cell electrodes [21] and chemical separation [11,12,31].…”

Novel Pd Nanocubes Supported on Activated Carbon as a Catalyst for the Suzuki-Miyaura Coupling Reaction

“…Some previous researchers have made great efforts to explain that catalysts with well-defined shapes of metal nanocrystals supported with exposed distinct crystal facets have different performances [9][10][11]. However, the Pd catalysts currently used in the aforementioned reactions are mainly based on polycrystalline nanoparticles of Pd with poorly controlled sizes and shapes [12,13].…”

Preparation of silica-supported Pd nanoparticle catalysts by an alcohol reduction method and evaluation of their catalytic properties in the dechlorination of an aromatic chloride

“…Increasing the metal dispersion decreases the metal particle size. Alcohols such as methanol (MeOH), ethanol (EtOH), and 1-propanol have also been used as reducing agents to prepare metal (Pd and Pt) nanoparticles on metal oxides or in the presence of protective polymers [3][4][5][6][7][8].…”