THERMAL-DECOMPOSITION AND FTIR STUDY OF PYRIDINE ADSORPTION ON PT/SIO2 SONOGEL CATALYSTS

被引：2
|
作者：
LOPEZ, T [1 ]
ASOMOZA, M [1 ]
GOMEZ, R [1 ]
BOSCH, P [1 ]
RODRIGUEZIZQUIERDO, JM [1 ]
CAUQUI, MA [1 ]
机构：
[1] UNIV CADIZ,FAC CIENCIAS,DEPT QUIM INORGAN,E-11510 PUERTO REAL,SPAIN
来源：
THERMOCHIMICA ACTA | 1995年 / 255卷
关键词：
CATALYST; COUPLED TECHNIQUE; DECOMPOSITION; FTIR; PYRIDINE; SONOGEL;
D O I：
10.1016/0040-6031(94)02153-F
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Platinum/SiO2 sonogel has been compared with the corresponding xerogel and an impregnated catalyst. The thermal behavior, the FTIR spectra and the pyridine adsorption show that Lewis acidity is present in the impregnated sample. In the sonogel, Lewis acidity turns to be very low and insensitive to desorption temperature. In the xerogel, both Lewis and Bronsted acidity was observed. In each sample, reduction in situ (without hydrogen flow) of the metal phase is determined by the OH content. Platinum is highly reduced in the sonogel, partially reduced in the xerogel and very slightly reduced in the impregnated sample.
引用
收藏
页码：319 / 328
页数：10
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