TY - JOUR
T1 - Design of a high-performance catalyst for CO oxidation
T2 - Selections from the Presentations of the 3rd Asia-Pacific Congress
AU - Liu, Jun Hong
AU - Chi, Yu Shan
AU - Lin, Hong Ping
AU - Mou, Chung Yuan
AU - Wan, Ben Zu
N1 - Funding Information:
This work was supported from the program of Academy Excellence sponsored by Ministry of Education in Taiwan.
PY - 2004/9/1
Y1 - 2004/9/1
N2 - Au nanoparticles embedded within mesoporous aluminosilicate particles have been prepared and used as catalyst for CO oxidation. In the presence of C 16TMAB, a stable aqueous solution of Au nanoparticles-surfactant without apparent aggregations was obtained by chemical reduction. After combining with aluminosilicates in an alkaline solution, the Au nanoparticles were mostly embedded within the mesoporous aluminosilicate particles, and the maximum loading of Au nanoparticle can reach around 36wt.%. The diameter of Au nanoparticles in mesoporous aluminosilicates are <10nm after calcination at 560°C under air. In this research, the quaternary ammonium surfactants serve as dual function agents, protecting agent for Au nanoparticle and templates for mesoporous silica. When the mesoporous aluminosilicate supports are in micron-size, the highest CO conversion is only about 16% over the catalyst with gold loading, Au/SiO2 = 8%. The conversion decreases to nearly zero at higher gold loadings due to extensive pore blocking. Reducing the dimension of mesoporous aluminosilicates to tens of nanometers makes the Au nanoparticles more accessible for CO oxidation, and the highest CO conversion reaches 70% over the catalyst with gold loading, Au/SiO2 = 24wt.%.
AB - Au nanoparticles embedded within mesoporous aluminosilicate particles have been prepared and used as catalyst for CO oxidation. In the presence of C 16TMAB, a stable aqueous solution of Au nanoparticles-surfactant without apparent aggregations was obtained by chemical reduction. After combining with aluminosilicates in an alkaline solution, the Au nanoparticles were mostly embedded within the mesoporous aluminosilicate particles, and the maximum loading of Au nanoparticle can reach around 36wt.%. The diameter of Au nanoparticles in mesoporous aluminosilicates are <10nm after calcination at 560°C under air. In this research, the quaternary ammonium surfactants serve as dual function agents, protecting agent for Au nanoparticle and templates for mesoporous silica. When the mesoporous aluminosilicate supports are in micron-size, the highest CO conversion is only about 16% over the catalyst with gold loading, Au/SiO2 = 8%. The conversion decreases to nearly zero at higher gold loadings due to extensive pore blocking. Reducing the dimension of mesoporous aluminosilicates to tens of nanometers makes the Au nanoparticles more accessible for CO oxidation, and the highest CO conversion reaches 70% over the catalyst with gold loading, Au/SiO2 = 24wt.%.
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U2 - 10.1016/j.cattod.2004.06.035
DO - 10.1016/j.cattod.2004.06.035
M3 - Conference article
AN - SCOPUS:4444299016
VL - 93-95
SP - 141
EP - 147
JO - Catalysis Today
JF - Catalysis Today
SN - 0920-5861
Y2 - 12 October 2003 through 12 October 2003
ER -