naa a22 4500 510820344 CHVBK 20180411083528.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11814-013-0120-x doi (NATIONALLICENCE)springer-10.1007/s11814-013-0120-x Enhancement of catalytic activity of Au/TiO 2 by thermal and plasma treatment [Elektronische Daten] [Asif Mahmood, Seong Woo] A significant enhancement in the catalytic activity of Au/TiO2 in CO oxidation and preferential oxidation reaction by creating the active sites on the catalyst surface by thermal treatment as well as by producing small gold particles by plasma treatment has been studied. Au/TiO2 catalyst (Au (1 wt%) supported on TiO2) was prepared by conventional deposition-precipitation method with NaOH (DP NaOH) followed by washing, drying and calcination in air at 400 °C for 4 h. Thermal treatment of Au/TiO2 was carried out at 550 °C under 0.05 mTorr. A small amount of Au/TiO2 catalyst was taken from the untreated and thermally treated Au/TiO2 and both kinds of catalysts were treated with plasma sputtering at room temperature. The activity of the catalysts has been examined in the reaction of CO oxidation and preferential oxidation (PROX) at 25-250 °C. Thermally treated Au/TiO2 showed better catalytic activity as compared to the untreated catalyst. There is also an additional enhancement in the catalytic activity due to plasma sputtering on the both kinds of catalysts. Thermally treated Au/TiO2 followed by plasma sputtering Au/TiO2 showed higher conversion rates for CO oxidation reaction compared with untreated, thermally treated and plasma sputtered Au/TiO2 catalysts. It may be concluded that the enhancement of catalytic activity of thermally treated Au/TiO2 followed by plasma sputtering is owing to the generation of active sites such as oxygen vacancies/defects in TiO2 support using thermal treatment as well as by producing small gold particles using plasma treatment. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Catalytic Activity nationallicence Au/TiO2 Catalyst nationallicence CO Oxidation nationallicence Thermal and Plasma Treatment nationallicence Mahmood Asif Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh, Kingdom of Saudi Arabia aut Woo Seong Department of Chemical & Biomolecular Engineering, Graduate School of EEWS (WCU) and Center for Ultramicrochemical Process Systems, Korea Advanced Institute of Science and Technology, 305-701, Daejon, Korea aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/10(2013-10-01), 1876-1881 0256-1115 30:10<1876 2013 30 11814 https://doi.org/10.1007/s11814-013-0120-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-013-0120-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mahmood Asif Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh, Kingdom of Saudi Arabia aut NATIONALLICENCE 700 1- Woo Seong Department of Chemical & Biomolecular Engineering, Graduate School of EEWS (WCU) and Center for Ultramicrochemical Process Systems, Korea Advanced Institute of Science and Technology, 305-701, Daejon, Korea aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/10(2013-10-01), 1876-1881 0256-1115 30:10<1876 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer