Selective oxidation of CO in the presence of air over gold-based catalysts Au/TiO₂/C (sonochemistry) and Au/TiO₂/C (microwave)

TY - JOUR

T1 - Selective oxidation of CO in the presence of air over gold-based catalysts Au/TiO2/C (sonochemistry) and Au/TiO2/C (microwave)

AU - George, P. P.

AU - Gedanken, A.

AU - Perkas, N.

AU - Zhong, Z.

N1 - Funding Information: The work in this paper was conducted within the framework of the Integrated Project NAPOLYDE, funded by the EUROPEAN Commission, Contract no.: NMP2-CT-2005-515846. We are thankful to Dr. Tova Tamari, Dr. Judith Grinblat, and Dr. Yuri Koltypin for their help with TEM, HRTEM measurements and technical support, respectively.

PY - 2008/4

Y1 - 2008/4

N2 - Two model catalysts, Au/TiO2/C (S) (sonochemically derived) and Au/TiO2/C (M) (microwave derived), were produced by employing ultrasound irradiation and microwave irradiation, respectively. The deposition of gold colloids onto the support powders, TiO2/C, was accomplished by using a solvated metal atom impregnation (SMAI) method. The SMAI technique provides highly-dispersed gold particles on the TiO2/C support. The catalytic performance of Au based catalysts 1 wt% Au-TiO2/C (S) and 1 wt%Au-TiO2(M)/C (M) have been tested for the oxidation of CO in the temperature range of 0-300 °C and compared to that of 1 wt% Au-TiO2 (Degussa-P25). A boost in the conversion of CO was observed for the sonochemically-derived catalyst, Au/TiO2/C (S), at low temperature. Hence, the reactivity order found for CO oxidation is (Au/TiO2/C (S) > Au/TiO2 (P25) > Au/TiO2/C (M)).

AB - Two model catalysts, Au/TiO2/C (S) (sonochemically derived) and Au/TiO2/C (M) (microwave derived), were produced by employing ultrasound irradiation and microwave irradiation, respectively. The deposition of gold colloids onto the support powders, TiO2/C, was accomplished by using a solvated metal atom impregnation (SMAI) method. The SMAI technique provides highly-dispersed gold particles on the TiO2/C support. The catalytic performance of Au based catalysts 1 wt% Au-TiO2/C (S) and 1 wt%Au-TiO2(M)/C (M) have been tested for the oxidation of CO in the temperature range of 0-300 °C and compared to that of 1 wt% Au-TiO2 (Degussa-P25). A boost in the conversion of CO was observed for the sonochemically-derived catalyst, Au/TiO2/C (S), at low temperature. Hence, the reactivity order found for CO oxidation is (Au/TiO2/C (S) > Au/TiO2 (P25) > Au/TiO2/C (M)).

KW - CO oxidation

KW - Gold catalysis

KW - Microwave

KW - Model catalyst

KW - Sonochemistry

UR - http://www.scopus.com/inward/record.url?scp=44249090043&partnerID=8YFLogxK

U2 - 10.1016/j.ultsonch.2007.06.006

DO - 10.1016/j.ultsonch.2007.06.006

M3 - 文章

C2 - 17659993

AN - SCOPUS:44249090043

SN - 1350-4177

VL - 15

SP - 539

EP - 547

JO - Ultrasonics Sonochemistry

JF - Ultrasonics Sonochemistry

IS - 4

ER -