Controlled one-pot synthesis of RuCu nanocages and Cu@Ru nanocrystals for the regioselective hydrogenation of quinoline

Abstract

RuCu nanocages and core-shell Cu@Ru nanocrystals with ultrathin Ru shells were first synthesized by a one-pot modified galvanic replacement reaction. The construction of bimetallic nanocrystals with fully exposed precious atoms and a high surface area effectively realizes the concept of high atom-efficiency. Compared with the monometallic Ru/C catalyst, both the RuCu nanocages and Cu@Ru core-shell catalysts supported on commercial carbon show superior catalytic performance for the regioselective hydrogenation of quinoline toward 1,2,3,4-tetrahydroquinoline. RuCu nanocages exhibit the highest activity, achieving up to 99.6% conversion of quinoline and 100% selectivity toward 1,2,3,4-tetrahydroquinoline.

Tuning electronic and composition effects in ruthenium-copper alloy nanoparticles anchored on carbon nanofibers for rechargeable Li-CO2 batteries

“…Ru4Cu1/CNFs. Moreover, the diffraction peaks of i-Ru4Cu1/CNFs shifted to higher angles compared to those of Ru/CNFs, which can be ascribed to the incorporation of Cu atoms into the Ru crystal lattice without changing the crystal structure and an indicative of formation of hexagonal close-packed (hcp) i-Ru4Cu1 nanoalloy[47,48]. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques were performed to investigate the morphologies and nanostructures of i-Ru4Cu1/CNFs (Fig.…”

Facile synthesis of urchin-like RuCu and hollow RuCuMo nanoparticles and preliminary insight to their formation process by cyclic voltammetry

“…Theoretically, the standard redox potential of Ru 3+ /Ru 0 and Cu 2+ /Cu 0 is 0.68 V and 0.34 V respectively, so the reduction of Ru species should be easier than Cu species. 27 Based on the results above, we postulated the formation process of RuCu NPs (Fig. 4).…”

Noble Metal-Based Nanocomposites for Fuel Cells

“…So far, diverse synthetic strategies have been developed to prepare diverse inorganic core-shell structures: semiconductor@semiconductor [62], metal@metal [63,64], semiconductor@metal [65], metal@semiconductor [66][67][68], and even multishell structures [69].…”