Catalytic properties of palladium nanoclusters synthesized within diblock copolymer films: hydrogenation of ethylene and propylene

Characterization of nanoparticles through medium-energy ion scattering

“…32,33 Here, the polyelectrolyte multilayer was used to bind nanoparticles. This process involves deposition of weak polyelectrolytes from diluted aqueous solution, based on electrostatic interactions of opposite polymer charges and specific substrates.…”

Catalytic polymeric membranes: Preparation and application

“…); they are elastic, they resist to fatigue, they have satisfactory diffusion and Melt/Casting GS sorption coefficients, they can be produced with incorporated catalysts as nano-sized dispersed metallic clusters [22,23], zeolites and activated carbons [24], or metallic complexes [25][26][27][28][29][30][31] and in some way, tailored as needed.…”

“…Ciebien et al [23] synthesized palladium nanoclusters within microphase-separated diblock copolymer films of [MTD] 113 [Pd(Cp N )PA] 50 (MTD = methyltetracyclododecene, Cp N = endo-2-(cyclopentadienylmethyl) norborn-5-ene, PA = h 3 -1-phenylallyl). Three factors contribute to the wellcontrolled formation of nanoclusters within micro-phase separated diblock copolymers:…”

“…(b) Schematic flow diagram of the hydrogenation of conjugated dienes in a catalytic polymeric hollow-fiber reactor: (1) carrier gas (N 2 ); (2) H 2 + N2; (3) concenser at constant temperature with a thermostat; (4-6) preheaters; (7 and 8) rotameters; (9) flask containing conjugated diene; (10) membrane reactor; (11 and 12) sampling ports; (13 and 14) needle valves [44]. Hydrogenation experiments of ethylene and propylene by catalytic membrane made from Pd/PolyMTD [23] were run as batch reactions in a Fischer-Porter bottle equipped with a magnetic stirrer and a gas sampling port. The nano composite films (4-6 mg, 14 wt.% Pd) were used at 120 8C.…”

“…A permeation study was conducted on a polyMTD sample to quantify differences in permeability among the reactants gases and to evaluate the possibility of using polymer-supported nanoclusters to selectively hydrogenate one species in a mixture. In Table 5 (adapted from Cibien et al [23]), the diffusion, solubility and permeability coefficients for ethylene, propylene, and 1,3 butadiene in polyMTD at room temperature are summarized.…”