Carbon Dioxide Reforming of Methane Over Nanocomposite Ni/ZrO2 Catalysts |
| |
Authors: | Bo-Qing Xu Jun-Mei Wei Ying-Tao Yu Jin-Lu Li Qi-Ming Zhu |
| |
Affiliation: | (1) State Key Lab of C1 Chemistry and Technology, Department of Chemistry, Tsinghua University, Beijing, 100084, China |
| |
Abstract: | A systematic study of the size effect of zirconia nanocrystals on nickel-catalyzed reforming of methane with CO2 shows that extremely stable Ni/ZrO2 catalysts are obtainable by hydrogen reduction of impregnated nickel nitrate on zirconia particles with sizes less than 25 nm. The same preparation method with larger particles of zirconia results in catalyst samples that deactivate rapidly in the reforming reaction. Comprehensive characterization with XRD, TPR/TPD, and TEM shows that the stable Ni/ZrO2 catalysts are better described as nanocomposites of size comparable to Ni metal (9-15 nm) and zirconia (7-25 nm) nanoparticles. The high percentage of the Ni-zirconia boundary or perimeter in the nanocomposite catalysts is believed to be crucial for the extremely stable catalytic activity. |
| |
Keywords: | metal-oxide nanocomposite nickel zirconia methane reforming syngas CO2 |
本文献已被 SpringerLink 等数据库收录! |