1995 Fiscal Year Final Research Report Summary
Preparation of Vicinally fixed Pd-Heteropoly Acid
| Project/Area Number |
06650904
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
触媒・化学プロセス
|
|---|
| Research Institution | Kinki University |
|---|
Principal Investigator |
KERA Yoshiya Kinki University, 理工学部, 教授 (80028216)
|
|---|
| Project Period (FY) |
1994 – 1995
|
| Keywords | Modification / Silane Coupling / Pd-Heteropolyacid / Vicinal Fixation / Lower Hydrocarbon / Oxidation Activity |
|---|
| Research Abstract |
Various carriers (SiO2, TiO2, Al2O3, etc.) were chemically modified with silane coupling agents to fix vicinally Pd and heteropolyacids on the carriers. When the atomic ratio of (Pd) / (PV14) in 14-vanado-phosphate (PV14) as HPA was adjusted to be equal 2, quite high activities and selectivities of alcohols to aldehydes were effectively obtained. On the other hand, the interaction of 12-phosphotungstate and 12-phosphomolybdate with the modifed carrier surfaces with silane coupling agents having amino group were analyzed in detail by FT-IR and XPS.As the results, the HPA were clarified to be fixed strongly and homogeneously up to almost monolayr through an acid-base interaction. By ESR,furthemore, it was recognized that an electron transfer from anilino group to HPA so as to stabilize a reduced state of PMo12. In fact, isobutylic acid was quite effectively oxidaized to methacrylic acid on the modified PMo12 catalysts.
|
