Controlled shape and size distribution of metal nanoparticles for surface catalytic reactions are important. Through deposition onto the periodic surface of h-BN we can adjust these parameters of gold thereby we are able to influence the catalytic activity of the nanoparticles. In this study we investigated the decomposition of ethanol on gold nanoparticles supported on h-BN/Rh(111). High-resolution electron energy loss spectroscopy (HREELS) and temperature programmed desorption (TPD) methods have been used on the experimental side. Ethanol showed enhanced stability on Au/h-BN/Rh(111) system. The stabilization effect increases with gold coverage and saturates before gold reaches a continuous adlayer. High selectivity was observed towards “CO free” hydrogen, a small part of ethanol dissociated to hydrogen and acetaldehyde without further decomposition. Density functional theory (DFT) calculations delivered important information about the adsorption characteristics of ethanol and hydrogen on model Au/h-BN/Rh(111). The importance of low-coordinated negatively charged Au atoms is confirmed by DFT results.
- Au nanoclusters
- Boron nitride
ASJC Scopus subject areas
- Process Chemistry and Technology