Au-based bimetallic catalysts: how the synergy between two metals affects their catalytic activity. Issue 51 (20th September 2019)

• Record Type: Journal Article
• Authors: Sha, Jin; Paul, Sébastien; Dumeignil, Franck; Wojcieszak, Robert
• Is Part Of: RSC advances. Volume 9:Issue 51(2019)
• Page Start: 29888
• Page End: 29901
• Publication Date: 2019-09-20
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra06001d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Supported bimetallic nanoparticles are particularly attractive catalysts due to increased activity and stability compared to their monometallic counterparts. Abstract : Supported bimetallic nanoparticles are particularly attractive catalysts due to increased activity and stability compared to their monometallic counterparts. In this work, gold-based catalysts have been studied as catalysts for the selective base-free oxidation of glucose. TiO2 -supported Au–Pd and Au–Cu series prepared by the sol-immobilization and precipitation-reduction methods, respectively, showed a significant synergistic effect, particularly when the theoretical weight ratio of the two metals was close to 1 : 1 (with an actual experimental bulk Au/Pd molar ratio of ca. 0.8 and ca. 0.4 for Au/Cu) in both cases. XPS analysis showed that the presence of Au δ +, Pd 2+ and CuOH species played an important role in the base-free glucose oxidation.