Yu. V. Shubin, P. E. Plyusnin, R. M. Kenzhin, A. A. Vedyagin
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引用次数: 0
Abstract
The possibility of using ruthenium in the composition of palladium–rhodium catalysts used to neutralize the exhaust gases of vehicles with gasoline engines was investigated. The thermolysis of a supported precursor in oxidizing and reducing atmospheres led to the formation of samples with different initial catalytic activity. The stability of trimetallic systems was compared under conditions of prompt thermal aging with that of reference samples of similar chemical composition but obtained by mechanical mixing of monometallic catalysts. The results obtained allowed us to conclude that the alloy nanoparticles were more stable, and the thermolysis of the precursor in a reducing atmosphere contributed to a higher initial activity of the catalyst in the oxidation of CO. According to the X-ray photoelectron spectroscopy data, the high thermal stability of trimetallic catalysts was due to a constant ratio between metals on the support surface in the course of the catalytic reaction.
摘要 研究了在用于中和汽油发动机汽车尾气的钯铑催化剂成分中使用钌的可能性。在氧化性和还原性气氛中对支撑前驱体进行热解，可形成具有不同初始催化活性的样品。在快速热老化条件下，将三金属体系的稳定性与化学成分相似但通过机械混合单金属催化剂获得的参考样品的稳定性进行了比较。研究结果使我们得出结论：合金纳米颗粒更稳定，前驱体在还原气氛中的热分解有助于提高催化剂在氧化 CO 时的初始活性。根据 X 射线光电子能谱数据，三金属催化剂之所以具有较高的热稳定性，是因为在催化反应过程中，载体表面的金属比例保持不变。
期刊介绍：
Kinetics and Catalysis Russian is a periodical that publishes theoretical and experimental works on homogeneous and heterogeneous kinetics and catalysis. Other topics include the mechanism and kinetics of noncatalytic processes in gaseous, liquid, and solid phases, quantum chemical calculations in kinetics and catalysis, methods of studying catalytic processes and catalysts, the chemistry of catalysts and adsorbent surfaces, the structure and physicochemical properties of catalysts, preparation and poisoning of catalysts, macrokinetics, and computer simulations in catalysis. The journal also publishes review articles on contemporary problems in kinetics and catalysis. The journal welcomes manuscripts from all countries in the English or Russian language.
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