DONOR PROPERTY OF REDUCED CERIA ELECTRONS - INFRARED STUDY OF TETRACYANOETHYLENE ADSORPTION

被引：4

作者：

BINET, C

JADI, A

LAVALLEY, JC

机构：

来源：

JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE | 1991年 / 88卷 / 04期

关键词：

D O I：

10.1051/jcp/1991880499

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Tetracyanoethylene (TCNE) adsorption onto ceria was studied at room temperature by means of FTIR spectroscopy. On ceria calcinated at 723 K and evacuated at 823 K, the tricyanovinylalcoolate anion (TVA-) was the main species formed ; it was characterized by an intense v(CO) band at 1564 cm-1. The same species was observed on MgO and Al2O3 pretreated in a similar way. On ceria H-2-reduced and evacuated at 823 K, strong v(CN) bands were observed and assigned to TCNE(x-) (x = 1, 2, 3) anions in a multilayer adsorption state. By comparison, TCNE adsorption on H2-pretreated alumina mainly led to TVA- species whereas the TCNE2- dianion was hardly detected. It is therefore concluded that the formation of TCNE(x-) anions on reduced ceria is due to the reducible character of the oxide and to the electron donor power of Ce3+ ions.

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页码：499 / 508

页数：10

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