DRIFTS study of platinum aluminophosphate oxynitride catalysts

被引：29

作者：

Centeno, MA ^{[1
]}

Debois, M ^{[1
]}

Grange, P ^{[1
]}

机构：

[1] Univ Catholique Louvain, Unite Catalyse & Chim Mat Divises, B-1348 Louvain, Belgium

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1998年 / 102卷 / 35期

关键词：

D O I：

10.1021/jp981750m

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Diffuse reflectance infrared spectroscopy (DRIFTS) has been used to compare the surface structure and stability of fresh and reduced Pt-AlPON catalysts with that of AlPON support. DRIFTS reveals that surface PNH2 species participate in the anchoring process of the platinum precursor; meanwhile, the metal-phase reduction process produces a deep decrease in the specific surface and total nitrogen content of the solid. On the other hand, the three solids undergo hydrolysis in the presence of gaseous water at concentration as low as 3 ppm. As a result of this hydrolysis reaction, part of the nitride ions are transformed into easily removable PNH4+ and NH surface species.

引用

页码：6835 / 6841

页数：7

共 27 条

[1] FTIR analysis of the surface of nanostructured aluminium nitride powder prepared via chemical synthesis [J].

Baraton, MI ;

Chen, XH ;

Gonsalves, KE .

JOURNAL OF MATERIALS CHEMISTRY, 1996, 6 (08) :1407-1412

[2] A LINEAR PHOSPHORYL ABSORPTION RELATIONSHIP [J].

BELL, JV ;

HEISLER, J ;

TANNENBAUM, H ;

GOLDENSON, J .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1954, 76 (20) :5185-5189

[3]

BENITEZ JJ, 1995, CATAL LETT, V34, P379

[4] Study of the stability of AlPON catalysts in an aqueous environment [J].

Benitez, JJ ;

Malet, P ;

Carrizosa, I ;

Odriozola, JA ;

Conanec, R ;

Marchand, R ;

Laurent, Y .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1997, 17 (15-16) :1979-1982

[5] Surface basicity of a new family of catalysts: Aluminophosphate oxynitride (AlPON) [J].

Benitez, JJ ;

Odriozola, JA ;

Marchand, R ;

Laurent, Y ;

Grange, P .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1995, 91 (24) :4477-4479

[6] Diffuse reflectance infrared (DRIFTS) and mass spectrometry study of thermal stability of aluminophosphate oxynitrides (AlPON) [J].

Benitez, JJ ;

Diaz, A ;

Laurent, Y ;

Grange, P ;

Odriozola, JA .

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS, 1997, 202 :21-29

[7] Aluminophosphates oxynitrides as base catalysts: Nature of the base sites and their catalytic implications [J].

Climent, MJ ;

Corma, A ;

Fornes, V ;

Frau, A ;

GuilLopez, R ;

Iborra, S ;

Primo, J .

JOURNAL OF CATALYSIS, 1996, 163 (02) :392-398

[8]

CONANEC R, 1992, HIGH TEMP CHEM PROCE, V1, P157

[9] OXIDES, MIXED OR IN SOLID-SOLUTION, HIGHLY DISPERSED OBTAINED BY THERMAL-DECOMPOSITION OF AMORPHOUS PRECURSORS [J].

COURTY, P ;

AJOT, H ;

MARCILLY, C ;

DELMON, B .

POWDER TECHNOLOGY, 1973, 7 (01) :21-38

[10]

Davydov A. A., 1990, INFRARED SPECTROSCOP

← 1 2 3 →