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首页> 外文期刊>RSC Advances >A mullite oxide catalyst of SmMn2O5 for three-way catalysis: synthesis, characterization, and catalytic activity evaluation
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A mullite oxide catalyst of SmMn2O5 for three-way catalysis: synthesis, characterization, and catalytic activity evaluation

机译：三元催化Smmn2O5的莫来钛催化剂：合成，表征和催化活性评估

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摘要

Mullite oxide SmMn2O5 (SMO) was synthesized through a co-precipitation method. The CO + O-2 model system and more realistic gas mixtures were evaluated, and compared with perovskite LaCoO3 (LCO), SMO showed a better reaction activity as well as a higher catalytic activity and stronger hydrothermal resistance. Characterizations including XRD, BET, SEM, XPS, H-2-TPR, O-2-TPD, and CO + O-2 pulse were undertaken in order to gain insight into the origin of the SMO three-way catalytic activity. The lower adsorbed oxygen reduction temperature for SMO by H-2-TPR indicated a better reducibility. O-2-TPD suggested that SMO exhibited excellent mobility of beta-oxygen species. CO + O-2 pulse further revealed that the SMO catalyst had a better oxygen storage capacity than the LCO perovskite did. With a better reducibility, facile mobility of oxygen species and better oxygen storage capacity, mullite oxide SMO showed a preferable three-way catalytic activity.
机译：通过共沉淀法合成莫来钛氧化物SMMN2O5（SMO）。 评估CO + O-2模型系统和更现实的气体混合物，并与Perovskite LaCoo3（LCO）相比，Smo显示出更好的反应活性以及更高的催化活性和更强的水热阻。 进行了包括XRD，BET，SEM，XPS，H-2-TPR，O-2-TPD和CO + O-2脉冲的特征，以便深入了解SMO三元催化活性的起源。 通过H-2-TPR进行较低的吸附氧还原温度，表明了更好的还原性。 O-2-TPD表明，SMO表现出优异的β-氧气迁移率。 CO + O-2脉冲进一步揭示了SMO催化剂比LCO PEROVSKITE具有更好的氧气储存能力。 具有更好的还原性，氧气种类和更好的氧气储存能力的容易迁移，莫来钛矿氧化物Smo显示出优选的三元催化活性。

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  • 来源
    《RSC Advances》 |2016年第70期|共10页
  • 作者

    Zhao Pengfei; Yu Pengfei; Feng Zijian; Chen Rong; Jia Liwei; Wang Jianqiang; Shen Meiqing; Shan Bin;

  • 作者单位

    Huazhong Univ Sci &

    Technol Sch Mat Sci &

    Technol State Key Lab Mat Proc &

    Die &

    Mould Technol Wuhan 430074 Peoples R China;

    Wuxi Weifu Environm Catalysts Co Ltd Engn Ctr 9 Lingjiang Rd Wuxi 214048 Jiangsu Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Mat Sci &

    Technol State Key Lab Mat Proc &

    Die &

    Mould Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Mech Sci &

    Engn State Key Lab Digital Mfg Equipment &

    Technol Wuhan 430074 Hubei Peoples R China;

    Wuxi Weifu Environm Catalysts Co Ltd Engn Ctr 9 Lingjiang Rd Wuxi 214048 Jiangsu Peoples R China;

    Tianjin Univ Sch Chem Engn &

    Technol 92 Weijin Rd Tianjin 300072 Peoples R China;

    Tianjin Univ Sch Chem Engn &

    Technol 92 Weijin Rd Tianjin 300072 Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Mat Sci &

    Technol State Key Lab Mat Proc &

    Die &

    Mould Technol Wuhan 430074 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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