Catalytic Activity of Pd and PdAg MPCs
In our lab, we have synthesized and characterized ~3nm diameter Pd and PdAg MPCs coated with various organic stabilizing ligands, including alkylamines (CnNH2, n = 8, 12, 16-18), hexanethiolates (C6S), and mixed monolayers of C8NH2/C6S ligands. These nanoparticles exhibit significantly different reactivities with hydrogen gas and different stabilities against H2-induced aggregation depending on the ligand and metal composition of the MPCs, making them great candidates for H2 sensing and storage applications. We have also explored the catalytic activity of the synthesized Pd and Pd alloy MPCs using α,β-unsaturated primary and secondary alcohols as substrates. This work is interesting because provides a better fundamental understanding of the factors controlling the catalytic selectivity and efficiency of Pd-based MPCs.
TEM images of drop-cast films of C6S Pd MPCs and C8NH2 Pd MPCs before (A, B) and after exposure to 100% H2 for 60 minutes (C, D).