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焙烧气氛对Pt/Al2O3 催化氧化COC3H6 性能的影响
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昆明贵金属研究所 稀贵金属综合利用新技术国家重点实验室,云南 昆明 650106

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国家重点研发计划项目(2016YFC0204902);移动源污染排放控制技术国家工程实验室开放基金项目(NELMS2017C02);昆明理工大学分析测试基金项目(2019P20181107010)


Effect of Calcination Atmospheres on Catalytic Perfor-mance of Pt/Al2O3 for Oxidation of CO and C3H6
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State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China

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National Key Research and Development Program of China (2016YFC0204902); Open Fund of National Engineering Laboratory for Mobile Source Emission Control Technology of China (NELMS2017C02); Analysis and Testing Foundation of Kunming University of Science and Technology (2019P20181107010)

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    摘要:

    使用Pt(NH3)2(NO2)2作为前驱体,通过过量浸渍法制备Pt/Al2O3催化剂,并将其在4种不同的气氛(H2、O2、NO或NH3)中进行焙烧。利用N2吸脱附、X射线衍射、程序升温还原(H2-TPR)、CO脉冲吸附、CO原位漫反射傅里叶变换红外光谱(CO in situ DRIFTS)等手段对催化剂的物化性质进行了表征。结果表明:由于还原性焙烧气氛导致了众多小尺寸和高分散的Pt纳米颗粒的生成,经1%(体积分数)H2/N2焙烧的Pt/Al2O3表现出最佳的CO和C3H6催化氧化性能。

    Abstract:

    Pt/Al2O3 catalysts were prepared by an excess impregnation method with Pt(NH3)2(NO2)2 as the precursor. Then they were calcined in four different atmospheres (H2, O2, NO, NH3), and characterized by N2 adsorption and desorption test, X-ray diffraction, H2-temperature programmed reduction (TPR) test, CO pulse adsorption test, and CO in-situ diffuse reflectance infrared Fourier transform spectroscopy (CO in situ DRIFTS). Results show that Pt/Al2O3 catalyst calcined in 1vol% H2/N2 atmosphere exhibits the best catalytic oxidation performance for CO and C3H6, because of the generation of numerous small-sized and highly dispersed Pt nanoparticles caused by the reducing calcination atmosphere.

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郭淼鑫,王凤军,王成雄,张爱敏,赵云昆,杜君臣.焙烧气氛对Pt/Al2O3 催化氧化COC3H6 性能的影响[J].稀有金属材料与工程,2021,50(9):3056~3061.[Guo Miaoxin, Wang Fengjun, Wang Chengxiong, Zhang Aimin, Zhao Yunkun, Du Junchen. Effect of Calcination Atmospheres on Catalytic Perfor-mance of Pt/Al2O3 for Oxidation of CO and C3H6[J]. Rare Metal Materials and Engineering,2021,50(9):3056~3061.]
DOI:10.12442/j. issn.1002-185X.20200537

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历史
  • 收稿日期:2020-07-24
  • 最后修改日期:2020-10-09
  • 录用日期:2020-10-15
  • 在线发布日期: 2021-09-26
  • 出版日期: 2021-09-24