Carbon Dots; Ruthenium nanoparticles; photocatalysis; electron transfer
Abstract :
[en] Ruthenium nanoparticles immobilized on environmentally benign luminescent carbon dots act as hydrogenation catalysts, whereby light irradiation results in greatly enhanced activity. Nitrogen-doped carbon dots were prepared by hydrothermal treatment, and served as supports for the organometallic synthesis of 2.1 nm Ru NPs. UV-irradiated Ru@CDs proved 1.5–13 times more active for C[double bond, length as m-dash]C hydrogenation of α–β unsaturated ketones under mild conditions (3.5 bar H2, 60 °C, in water/butan-1-ol) than when used in the dark. Reference experiments and mechanistic investigations rationalize this activity enhancement by a transfer of electron density from the irradiated CDs to the Ru NPs. The strong synergistic effects arising from the combination of CDs and Ru NPs under UV are potentially more broadly accessible with other CDs structures and metal NPs compositions.
Disciplines :
Chemistry
Author, co-author :
Campalani, Carlotta ; Université de Liège - ULiège > Département de chimie (sciences) > Center for Integrated Technology and Organic Synthesis ; Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34–36, 45470, Mülheim an der Ruhr, Germany
Durai, Manisha; Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34–36, 45470, Mülheim an der Ruhr, Germany ; Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany
Leitner, Walter ; Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34–36, 45470, Mülheim an der Ruhr, Germany ; Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany
Bordet, Alexis ; Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34–36, 45470, Mülheim an der Ruhr, Germany
Language :
English
Title :
Photo-induced enhancement of hydrogenation activity for ruthenium nanoparticles immobilized on carbon dots
