Effect of the Oxidation Degree of a Nickel Foil Surface on Its Catalytic Activity in the Reaction of Ethylene Oxidation

被引：0
|
作者：
V. Yu. Bychkov
Yu. P. Tulenin
A. Ya. Gorenberg
V. N. Korchak
机构：
[1] Semenov Institute of Chemical Physics,
[2] Russian Academy of Sciences,undefined
来源：
Kinetics and Catalysis | 2020年 / 61卷
关键词：
nickel catalysts; ethylene oxidation;
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学科分类号：
摘要：
The effect of the oxidation degree of a nickel foil surface on the rate of catalytic oxidation of ethylene was studied by a pulse method at 600 and 700°C. It was shown that a reduced metallic surface demonstrated a high activity in partial ethylene oxidation, whereas a partially oxidized surface with an oxidation degree of ~24 formal O2 monolayers, in the total oxidation of C2H4. A SEM investigation has revealed that the oxidized surface was partially coated with nickel oxide nanocrystals. A further increase in the surface oxidation degree led to a continuous coverage of the Ni surface with oxide crystals and a dramatic decrease of catalytic activity. In addition, a low maximum of total ethylene oxidation was observed at 700°C in the range of surface oxidation degree of 95–135 O2 monolayers.
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页码：631 / 636
页数：5
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