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Influence of Oxidative Treatment and Platinum Content on the Stability of the Pt/Sibunit System in an Oxidizing Atmosphere at Elevated Temperatures

机译:氧化处理和铂含量对升高温度氧化气氛中Pt / SibUnit系统的稳定性影响

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摘要

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 degrees 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.
机译:研究了升高的温度对含氧气氛中碳材料的纹理和结构特征的影响,取决于HNO3的初步处理和活性组分(Pt)的存在和量的初步处理。 根据热重量测定的结果,HNO3的SIBUNIT的初步处理导致碳氧化温度范围的增加,而PT的引入导致该温度范围的降低。 发现在400℃的温度下,在氮气混合物中对4小时的Pt / sibUnit样品暴露在400℃的温度下导致总体积和平均孔径的增加,并且在比表面积略有变化, 铂的平均粒度增加到2至5nm。

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  • 来源
    《Solid Fuel Chemistry》 |2020年第6期|385-391|共7页
  • 作者单位

    Russian Acad Sci Ctr New Chem Technol Boreskov Inst Catalysis Siberian Branch Omsk 644040 Russia;

    Russian Acad Sci Ctr New Chem Technol Boreskov Inst Catalysis Siberian Branch Omsk 644040 Russia;

    Russian Acad Sci Ctr New Chem Technol Boreskov Inst Catalysis Siberian Branch Omsk 644040 Russia;

    Russian Acad Sci Ctr New Chem Technol Boreskov Inst Catalysis Siberian Branch Omsk 644040 Russia;

    Russian Acad Sci Ctr New Chem Technol Boreskov Inst Catalysis Siberian Branch Omsk 644040 Russia;

    Russian Acad Sci Ctr New Chem Technol Boreskov Inst Catalysis Siberian Branch Omsk 644040 Russia;

    Natl Res Tomsk Polytech Univ Tomsk 634050 Russia;

    Russian Acad Sci Ctr New Chem Technol Boreskov Inst Catalysis Siberian Branch Omsk 644040 Russia;

    Russian Acad Sci Ctr New Chem Technol Boreskov Inst Catalysis Siberian Branch Omsk 644040 Russia;

    Russian Acad Sci Ctr New Chem Technol Boreskov Inst Catalysis Siberian Branch Omsk 644040 Russia;

    Russian Acad Sci Ctr New Chem Technol Boreskov Inst Catalysis Siberian Branch Omsk 644040 Russia;

    Russian Acad Sci Ctr New Chem Technol Boreskov Inst Catalysis Siberian Branch Omsk 644040 Russia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pt; C; Sibunit; phase composition; oxidation stability; carbon; porous structure;

    机译:pt;c;sibunit;相位组成;氧化稳定性;碳;多孔结构;

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