NOx-TPD as a tool to estimate the accessible zirconia surface from ZrO2-containing materials
Introduction Zirconia has interesting catalytic properties when used either as catalyst or support. When promoted by tungstates, ZrO2 displays unique acidic properties which makes it a promising candidate for reactions such as the isomerization of alkanes. It has also been reported that MoS2 supported on ZrO2 have three to five times higher hydrodesulfurization and hydrogenation activities than their alumina-supported counterpart. ZrO2 suffers, however, from a smaller surface area than Al2O3. To overcome this drawback, attempts have been made to disperse ZrO2 on oxide supports with larger surface area. The main factor determining successful synthesis of materials such as tungstated ZrO2 and supported ZrO2 is the extent of coverage of an oxide support by the other. Physical methods (ISS, XPS) can be used in the elucidation of the dispersion of oxides but their applicability becomes limited for systems such as ZrO2 nanoparticles dispersed on a porous support such as SBA-15.
Hiu Ying LAW Juliette BLANCHARD Xavier CARRIER Cyril THOMAS
Laboratoire de Réactivité de Surface, UPMC-Parisó, UMR CNRS 7197, 4 Place Jussieu, Paris, 75252, France
国际会议
6th International Conference on Environmental Catalysis(第六届国际环境催化大会 ICEC 2010)
北京
英文
63-63
2010-09-12（万方平台首次上网日期，不代表论文的发表时间）