3)2(NO2)2作為前驅(qū)體，通過過量浸漬法制備Pt/Al2O3催化劑，并將其在4種不同的氣氛（H2、O2、NO或NH3）中進行焙燒。利用N2吸脫附、X射線衍射、程序升溫還原（H2-TPR）、CO脈沖吸附、CO原位漫反射傅里葉變換紅外光譜（CO in situ DRIFTS）等手段對催化劑的物化性質(zhì)進行了表征。結(jié)果表明：由于還原性焙燒氣氛導致了眾多小尺寸和高分散的Pt納米顆粒的生成，經(jīng)1%（體積分數(shù)）H2/N2焙燒的Pt/Al2O3表現(xiàn)出最佳的CO和C3H6催化氧化性能。"/>

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焙燒氣氛對Pt/Al2O3 催化氧化CO和C3H6 性能的影響
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昆明貴金屬研究所 稀貴金屬綜合利用新技術國家重點實驗室，云南 昆明 650106

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國家重點研發(fā)計劃項目（2016YFC0204902）;移動源污染排放控制技術國家工程實驗室開放基金項目（NELMS2017C02）;昆明理工大學分析測試基金項目（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作為前驅(qū)體，通過過量浸漬法制備Pt/Al2O3催化劑，并將其在4種不同的氣氛（H2、O2、NO或NH3）中進行焙燒。利用N2吸脫附、X射線衍射、程序升溫還原（H2-TPR）、CO脈沖吸附、CO原位漫反射傅里葉變換紅外光譜（CO in situ DRIFTS）等手段對催化劑的物化性質(zhì)進行了表征。結(jié)果表明：由于還原性焙燒氣氛導致了眾多小尺寸和高分散的Pt納米顆粒的生成，經(jīng)1%（體積分數(shù)）H2/N2焙燒的Pt/Al2O3表現(xiàn)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,王鳳軍,王成雄,張愛敏,趙云昆,杜君臣.焙燒氣氛對Pt/Al2O3 催化氧化CO和C3H6 性能的影響[J].稀有金屬材料與工程,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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  • 收稿日期:2020-07-24
  • 最后修改日期:2020-10-09
  • 錄用日期:2020-10-15
  • 在線發(fā)布日期: 2021-09-26
  • 出版日期: 2021-09-24