Ultrasound-assisted green synthesis of Ru supported on LDH-CNT composites as an efficient catalyst for N-ethylcarbazole hydrogenation

Yolk–shell type carbon–silica nanoarchitecture with dispersed and stabilized Ru nanoparticles for enhanced hydrogenation of aromatic compounds

“…1l shows the Ru 2p spectrum of the catalyst. The characteristic peaks of 462.5 eV, 484.9 eV, 464.8 eV and 486.8 eV can be ascribed to Ru 0 and RuO 2 , 40,41 respectively. It can be seen from XPS results that Ru species mainly existed in the metallic state.…”

Ultrasound-assisted preparation of PdCo bimetallic nanoparticles loaded on beta zeolite for efficient catalytic hydrogen production from dodecahydro-N-ethylcarbazole

“…This is due to the fact that ultrasonication accelerates the galvanic replacement reaction and favors the formation of PdCo bimetallic nanoparticles. Excessive ultrasonic power may rapidly excite the –OH groups on the beta zeolite surface to generate strongly reducing hydrogen radicals ( · H), which directly reduce Pd 2+ to Pd [42] . It weakens the interaction between Pd and Co.…”

“…The hydrogen release efficiency can still reach 98 % after four consecutive cycles. Liu et al [42] also prepared Ru nanocatalysts using an ultrasound-assisted method. The formed Ru NPs were highly dispersed with small particle sizes.…”

Heterogeneous Catalysts in N-Heterocycles and Aromatics as Liquid Organic Hydrogen Carriers (LOHCs): History, Present Status and Future

“…After numerous experiments, researchers found that the catalysts with noble metals, such as Ru [ 70 , 71 , 72 ], Pd [ 73 , 74 , 75 ], Pt [ 76 , 77 , 78 ] and Rh [ 79 , 80 ], showed excellent performance in the hydrogenation and dehydrogenation of LOHCs. In addition, researchers also found that selecting an appropriate catalyst carrier to load active metal components can further improve the catalytic performance of the catalyst [ 81 , 82 , 83 ]. In the following sections, research developments in relation to catalysts of LOHCs will be elaborated from the aspects of active metal components and carriers.…”

“…The catalyst carrier is one of the important factors that affect the performance of a supported catalyst. The catalyst carrier can modify the interaction between the reaction substrate and the metal active component, and the appropriate carrier can effectively enhance the catalyst activity [ 81 , 82 , 83 , 100 ]. In order to further improve the catalytic performance of hydrogenation catalysts, researchers had attempted to use new catalyst carriers instead of conventional Al 2 O 3 to support metal ruthenium, and obtained exciting results.…”