Provider: Ingenta Connect Database: Ingenta Connect Content: application/x-research-info-systems TY - ABST AU - Gazdag, Tamás AU - Baróthi, Ádám AU - Juhász, Koppány Levente AU - Kunfi, Attila AU - Németh, Péter AU - Sápi, András AU - Kukovecz, Ákos AU - Kónya, Zoltán AU - Szőori, Kornél AU - London, Gábor TI - Effect of Particle Restructuring During Reduction Processes Over Polydopamine-Supported Pd Nanoparticles JO - Journal of Nanoscience and Nanotechnology PY - 2019-01-01T00:00:00/// VL - 19 IS - 1 SP - 484 EP - 491 KW - Heterogeneous Catalysis KW - Transfer-Hydrogenation KW - Enantioselective Hydrogenation KW - Transmission Electron Microscopy KW - Polydopamine KW - Palladium N2 - The effect of catalyst restructuring on the polydopamine-supported Pd catalyzed transfer hydrogenation of ethyl 4-nitrobenzoate and the catalytic hydrogenation of (E)-2-methyl-2-butenoic acid is reported. Transmission electron microscopy investigation of different catalyst pre-treatment and reaction conditions revealed high catalytic activity in both reactions unless drastic aggregation of the active metal occurred. In the transfer hydrogenation reaction aggregation was primarily dependent on the H-source used, while in the catalytic hydrogenation additives in combination with the reductive environment led to extensive Pd aggregation and thus decreased catalytic activity. The enantioselective hydrogenation of (E)-2-methyl-2-butenoic acid showed increased enantioselectivity and decreased conversion with increased particle size. UR - https://www.ingentaconnect.com/content/asp/jnn/2019/00000019/00000001/art00064 M3 - doi:10.1166/jnn.2019.15770 UR - https://doi.org/10.1166/jnn.2019.15770 ER -