Min, Byoung Koun Deng, Xingyi Li, Xiaoying Friend, Cynthia M. Alemozafar, Ali Reza 2024-01-20T20:35:18Z 2024-01-20T20:35:18Z 2021-09-05 2009-09 1867-3880 https://pubs.kist.re.kr/handle/201004/132189 The reactivity and selectivity for the oxidation of propene and acrolein on oxidized Au nanoparticles on Au(111) depend on the local bonding, the particle size, and the degree of order. The local bonding of O and the particle size distribution and order are controlled by the rate and temperature for oxygen deposition using ozone, which forms O-containing gold particles on the surface. On small, disordered particles, oxygen is bound in sites with local threefold coordination, based on measured vibrational energies. The O on these small disordered nanoclusters, formed by O-3 decomposition on Au(111) at 200 K, is highly reactive and yields partial oxidation products of propene, for example, acrolein and acrylic acid. In contrast, atomic oxygen present in ordered 2D islands formed at 400 K is relatively unreactive and only produces CO2 and H2O. All pathways involve initial C-H activation. These results indicate that local bonding of O is an important factor to consider in understanding the effect of particle size in gold-based catalysis involving hydrocarbons. English WILEY-V C H VERLAG GMBH SCANNING-TUNNELING-MICROSCOPY OXYGEN-COVERED AU(111) ATOMIC OXYGEN HYDROGEN-PEROXIDE LOW-TEMPERATURE GOLD CATALYSTS METAL-SURFACES CO OXIDATION ADSORPTION NANOPARTICLES Tuning Reactivity and Selectivity for Olefin Oxidation through Local O Bonding on Au Article 10.1002/cctc.200900101 1 CHEMCATCHEM, v.1, no.1, pp.116 - 121 CHEMCATCHEM 1 1 116 121 scie scopus 000274026000019 2-s2.0-77952053332 Chemistry, Physical Chemistry Article SCANNING-TUNNELING-MICROSCOPY OXYGEN-COVERED AU(111) ATOMIC OXYGEN HYDROGEN-PEROXIDE LOW-TEMPERATURE GOLD CATALYSTS METAL-SURFACES CO OXIDATION ADSORPTION NANOPARTICLES alkenes density functional calculations gold mass spectrometry oxidation