α-alumina-supported nickel catalysts prepared with nickel acetylacetonate.: 2.: A study of the thermolysis of the metal precursor

被引：40

作者：

Molina, R ^{[1
]}

Poncelet, G ^{[1
]}

机构：

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

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 51期

关键词：

D O I：

10.1021/jp9907286

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 thermolysis of nickel acetylacetonate supported on alpha-alumina has been investigated by thermal methods (TGA-DTG-DTA), infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). At 250 degrees C and in static air atmosphere, decomposition of the metal ligands is nearly complete. Higher temperatures are needed in an inert atmosphere or in a vacuum. The variation of XPS peak parameters of samples heated at various temperatures between 120 and 900 degrees C has been interpreted as a change of the distribution of the Ni species between the octahedral and tetrahedral aluminum sites of the support, and a progressive formation of a nickel aluminate-like species, in agreement with temperature-programmed reduction features.

引用

页码：11290 / 11296

页数：7

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