The sonochemical approach improves the CuO-ZnO/TiO₂ catalyst for WGS reaction

TY - JOUR

T1 - The sonochemical approach improves the CuO-ZnO/TiO2 catalyst for WGS reaction

AU - Perkas, Nina

AU - Gunawan, Poernomo

AU - Amirian, Galina

AU - Wang, Zhan

AU - Zhong, Ziyi

AU - Gedanken, Aharon

PY - 2014/4/28

Y1 - 2014/4/28

N2 - The CuO-ZnO composite was deposited onto two kinds of titania supports, which are synthetic mesoporous TiO2 and commercial TiO2 P25 (Degussa), via the ultrasound assisted precipitation and incipient wetness impregnation (IWI) methods, respectively. The catalysts were tested for WGS reaction in the temperature range of 200-400 °C, and the best catalytic performance was achieved for the sonochemically prepared catalysts supported on the commercial TiO2 P25, which contains well crystallized anatase and rutile phases. Although the synthetic mesoporous TiO2 has a higher surface area, its textural structure is not stable under the reaction conditions, leading to gradual deactivation of the CuO-ZnO/TiO2 catalyst. It is found that the sonochemical preparation offers at least two advantages: (1) generation of mesopores on the catalyst surface and (2) doping of ZnO into the CuO phase. The doping of ZnO, particularly in the case of commercial TiO2 P25, provides high activity and extra stability to the active phase of Cu0. These new findings provide new insights into the design and development of better heterogeneous catalysts for WGS reaction. This journal is

AB - The CuO-ZnO composite was deposited onto two kinds of titania supports, which are synthetic mesoporous TiO2 and commercial TiO2 P25 (Degussa), via the ultrasound assisted precipitation and incipient wetness impregnation (IWI) methods, respectively. The catalysts were tested for WGS reaction in the temperature range of 200-400 °C, and the best catalytic performance was achieved for the sonochemically prepared catalysts supported on the commercial TiO2 P25, which contains well crystallized anatase and rutile phases. Although the synthetic mesoporous TiO2 has a higher surface area, its textural structure is not stable under the reaction conditions, leading to gradual deactivation of the CuO-ZnO/TiO2 catalyst. It is found that the sonochemical preparation offers at least two advantages: (1) generation of mesopores on the catalyst surface and (2) doping of ZnO into the CuO phase. The doping of ZnO, particularly in the case of commercial TiO2 P25, provides high activity and extra stability to the active phase of Cu0. These new findings provide new insights into the design and development of better heterogeneous catalysts for WGS reaction. This journal is

UR - http://www.scopus.com/inward/record.url?scp=84897095234&partnerID=8YFLogxK

U2 - 10.1039/c3cp55307h

DO - 10.1039/c3cp55307h

M3 - 文章

AN - SCOPUS:84897095234

SN - 1463-9076

VL - 16

SP - 7521

EP - 7530

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

IS - 16

ER -