Abstract

The effect of elevated temperatures on the textural and structural characteristics of the carbon material Sibunit in an oxygen-containing atmosphere was studied depending on the preliminary treatment of Sibunit with HNO₃ and the presence and the amount of an active component (Pt). According to the results of thermogravimetry, the preliminary treatment of Sibunit with HNO₃ led to an increase in the temperature range of carbon oxidation, while the introduction of Pt led to a decrease in this temperature range. It was found that an exposure of Pt/Sibunit samples for 4 h in a nitrogen–air mixture at a temperature of 400°C led to an increase in the total volume and average pore diameter with a slight change in the specific surface area, and the average particle size of platinum increased from 2 to 5 nm.

中文翻译：

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高温下氧化处理和铂含量对Pt / Sibunit系统稳定性的影响

摘要

研究了高温对含氧气氛中碳材料Sibunit的组织和结构特性的影响，具体取决于用HNO ₃预处理Sibunit以及活性成分（Pt）的存在和含量。根据热重分析的结果，HNO ₃预处理Sibunit导致碳氧化的温度范围增加，而Pt的引入导致该温度范围的减小。结果发现，Pt / Sibunit样品在温度为400°C的氮气-空气混合物中暴露4小时会导致总体积和平均孔径的增加，并且比表面积略有变化，并且铂的平均粒径从2纳米增加到5纳米。