Role of phosphates in the promotion of silver catalysts for partial oxidation: I. Structure and properties of phosphates on the surface of polycrystalline silver

被引：8

作者：

Knyazev, AS ^{[1
]}

Boronin, AI

Vodyankina, OV

Koshcheev, SV

Kurina, LN

机构：

[1] Russian Acad Sci, Inst Petrochem, Siberian Div, Tomsk 634055, Russia

[2] Russian Acad Sci, Boreskov Inst Catalysis, Siberian Div, Novosibirsk 630090, Russia

[3] Tomsk VV Kuibyshev State Univ, Tomsk 634050, Russia

来源：

KINETICS AND CATALYSIS | 2005年 / 46卷 / 01期

关键词：

D O I：

10.1007/s10975-005-0022-y

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：

The chemical composition, structure, and properties of an H3PO4-promoted polycrystalline silver foil are studied by XPS. The surface of the doped sample contains oxygen in two states with binding energies of 531.1 and 533.0 eV. Heat treatment results in silver clusters distributed in the polyphosphate matrix. It follows from TDS data that the surface of the promoted catalyst contains a strongly bound oxygen species that desorbs at similar to 900 K. It is believed that the silver clusters stabilized by the phosphate matrix are active sites on the surface of the phosphorus-promoted catalyst.

引用

页码：144 / 150

页数：7

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