Tuning lattice strain in Quasi-2D Au-rGO nanohybrid catalysts for dimethylphenylsilane solid state silylation to disiloxane
Document Type
Article
Publication Date
5-1-2023
Abstract
This study investigates the effect of lattice strain on quasi-2D Au-rGO nanohybrids by growing cubic shape -controlled Au nanocrystals on rGO. To induce the lattice strain, a trisodium citrate capping agent and different concentrations of Au nanoparticles ranging from 0.2 to 1 mM were used. The 0.4 mM Au-rGO was confirmed with a low lattice strain differential of 0.1% between crystallographic planes (1 1 1), (200), (220), and (220) (311). The catalytic solid-state activity of 0.4 mM Au-rGO during conversion of dimethylphenylsilane to diphenyltetramethyldisiloxane is highest due to the low lattice strain differential. Following first-order ki-netics, more dimethylphenylsilane was converted to diphenyltetramethyldisiloxane at a rate of 5.5 mol. L-1s-1 and 0.75 s-1 rates constant after increasing the solid-state silylation reaction time to 12 h. The findings represent a significant advance towards understanding the synergy of lattice strain in nanomaterials and their activity for the development of quantum catalytic devices.
Keywords
Gold nanoparticles, Graphene oxide, Solventless catalysis, Silylation reaction, Single -atom catalyst
Divisions
sch_che,CHEMISTRY,nanotechnology
Funders
Science and Technology Development Fund (STDF) Ministry of Higher Education & Scientific Research (MHESR) Ministry of Higher Education, Research & Innovation, Oman (FRGS/1/2017/STG01/UM/02/2),University of Malaya Research Grant (UMRG RP044B-17AET)
Publication Title
Materials Science and Engineering B-Advanced Functional Solid-State Materials
Volume
291
Publisher
Elsevier
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS