Novel thermal stable (Zr, Nb)MCM-41 supports for platinum
Platinum (1 wt％) was loaded on the mesoporous supports prepared from zirconium included to silicate and niobiosilicate MCM-41 with two methods, during the one step synthesis and by the impregnation. The nature, dispersion, and catalytic behaviour of Pt-species as well as the morphology, thermal stability and surface properties of the supports and catalysts were studied by XRD, N2 adsorption, TEM, SEM, TG, UV-VIS measurements, the test reactions (2- PrOH and acetonylacetone), and NO+O2+C3H6 adsorption and reaction combined with the FTIR study. We have succeeded in obtaining highly thermal stable catalysts in which Nb species plays the role of NOx storage; Zr promotes thermal stability, uniform small particles, Nb storage behavior, and Pt dispersion, as well as enhancing the basicity of the support; and Pt acts as a redox centre.
Joanna Goscianska Maria Ziolek
Adam Mickiewicz University, Faculty of Chemistry, Grunwaldzka 6, 60-780 Poznan, Poland
国际会议
北京
英文
2007-08-12（万方平台首次上网日期，不代表论文的发表时间）