The Evolution of Gold Nanoparticles in the Presence of Configurational Ion Cu2+ of Hydrotalcites Supports. Issue 26 (9th July 2018)

• Record Type: Journal Article
• Authors: Liu, Na; Liu, Dan; Tang, Tian; Dong, Wensheng; Liu, Chunling; Xu, Chunli
• Is Part Of: ChemistrySelect. Volume 3:Issue 26(2018)
• Page Start: 7478
• Page End: 7484
• Publication Date: 2018-07-09
• Subjects: AuCu nanoparticles -- Configurational ion Cu2+ -- Semi-embedded -- Surface reaction; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201800358
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Controlled synthesis of gold nanoparticles had attracted much attention in catalysis. The evolution of gold nanoparticles by impregnation was investigated in the presence of configurational ion Cu 2+ of hydrotalcites supports. The formation of Au nanoparticles experienced two steps. In the drying step, part of Au ions was reduced by H2 O. The reducing extents of Au ions and the dispersion of Au nanoparticles were affected by configurational ion Cu 2+ in the hydrotalcites supports. In the reduction step, all the residue Au ions were reduced by H2 and the Au nanoparticles formed in the previous step was redistributed. Both the redistribution of Au nanoparticles formed in the previous step and the distribution of Au nanoparticles formed in the second step was affected by the surface reaction between Au on the surface of supports and Cu embedded in the supports. The surface reaction controlled the dispersion of Au nanoparticles. The size of gold nanoparticles was 2.7 nm, which showed high activity in benzyl alcohol oxidation with benzaldehyde yield of 95%. Abstract : The evolution of gold nanoparticles by impregnation was investigated in the presence of configurational ion Cu 2+ of hydrotalcites supports. The formation of Au nanoparticles experienced the drying step and reduction step. The distribution of Au nanoparticles formed in the two steps was affected by the surface reaction between Au on the surface of supports and Cu embedded in the supports. The surface reaction controlled the dispersion of Au nanoparticles.