ION-CYCLOTRON RESONANCE STUDY OF ELEMENTARY STAGES OF THE CATALYTIC-OXIDATION OF CO BY N2O IN THE PRESENCE OF VIA-GROUP METAL-IONS

被引：12
|
作者：
KIKHTENKO, AV [1 ]
GONCHAROV, VB [1 ]
ZAMARAEV, KI [1 ]
机构：
[1] BORESKOV CATALYSIS INST PR AKAD LAVRENTIEVA 5,NOVOSIBIRSK 630090,RUSSIA
来源：
CATALYSIS LETTERS | 1993年 / 21卷 / 3-4期
关键词：
ION-CYCLOTRON RESONANCE; GAS PHASE CATALYTIC OXIDATION; NITROGEN MONOXIDE; CARBON MONOXIDE; MO(X)+; RATE CONSTANTS; BOND ENERGIES;
D O I：
10.1007/BF00769487
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：
Gas phase reactions of Mo+ and W+ ions with the molecules of various oxidants (NO, O2, N2O, CH2O, C2H4O) were studied using ion cyclotron resonance. In oxidation with N2O the mono-, di- and trioxide metal cations are formed consecutively. The trioxide MO3+ ions of both metals react with CO to form CO2 and MO2+ ions. In this way, catalytic reaction N2O + CO --> N2 + CO2 occurs in the gas phase with MoO3+/MoO2+ and WO3+/WO2+ couples as catalysts. The rate constants have been measured for both stages of the catalytic cycle as well as for the stages of the catalyst preparation. Metal-oxygen bond energies were estimated for MoO(x)+ and WO(x)+ species with various x. The mechanism of CO oxidation with MoO(x)+ and WO(x)+ cations as catalysts in the gas phase is discussed in comparison with that for the oxidation over classical solid oxide catalysts.
引用
收藏
页码：353 / 360
页数：8
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