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Synthesis of a Highly Active and Stable Pt/Co3O4 Catalyst and Its Application for the Catalytic Combustion of Toluene
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2019-06-18 , DOI: 10.1002/ejic.201900372 Xuefeng Hu 1, 2 , Zeshu Zhang 1, 3 , Yibo Zhang 1 , Liwei Sun 1, 3 , Heyuan Tian 1, 3 , Xiangguang Yang 1, 3
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2019-06-18 , DOI: 10.1002/ejic.201900372 Xuefeng Hu 1, 2 , Zeshu Zhang 1, 3 , Yibo Zhang 1 , Liwei Sun 1, 3 , Heyuan Tian 1, 3 , Xiangguang Yang 1, 3
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Catalytic combustion has become one of the most economical, feasible and effective tools for the abatement of VOCs. However, it is difficult to prepare supported Pt catalysts possessing both excellent catalytic activity and stability by traditional preparation methods, such as incipient‐wetness impregnation method and nanoparticle loading method. In this work, we prepared Pt/Co3O4 catalyst with high catalytic activity and stability for the catalytic combustion of toluene by galvanic displacement method. As comparing, additional reference samples were prepared using incipient‐wetness impregnation method and nanoparticle loading method, respectively. All of the samples were characterized by XRD, TEM, H2‐TPR, O2‐TPD and XPS techniques. The catalyst prepared by galvanic displacement method exhibited the best catalytic activity with the temperature of 90 % toluene conversion about 150 °C (T90 = 150 °C) and outstanding stability reflected in a continuous 100 h on‐stream toluene combustion lifetime experiment without catalytic activity decline at the GHSV = 60 000 mL g–1 h–1 compared to which prepared by traditional methods. These results are attributed to the excellent oxygen mobility, the high surface chemisorbed oxygen species concentration and the strong interaction between Pt and support Co3O4. Therefore, our work provided a universal strategy for designing high‐efficiency and stable catalyst for the abatement of VOCs at low temperature.
中文翻译：
高活性稳定的Pt / Co3O4催化剂的合成及其在甲苯催化燃烧中的应用
催化燃烧已成为减少VOC的最经济，可行和有效的工具之一。但是，难以通过传统的湿法浸渍法，纳米粒子负载法等制备方法来制备兼具优异的催化活性和稳定性的负载型Pt催化剂。本文通过电置换法制备了具有高催化活性和稳定性的Pt / Co 3 O 4催化剂，用于甲苯的催化燃烧。作为比较，分别使用初始润湿浸渍法和纳米颗粒负载法制备了其他参考样品。所有样品均通过XRD，TEM，H 2 -TPR，O 2表征TPD和XPS技术。用电流置换法制备的催化剂在90％的甲苯转化温度约150°C（T 90 = 150°C）时表现出最佳的催化活性，并且在连续100 h的甲苯燃烧持续寿命试验中表现出出色的稳定性，而没有催化作用。与传统方法制备的相比，GHSV = 60 000 mL g –1 h –1时活性下降。这些结果归因于优异的氧迁移率，高表面化学吸附的氧种类浓度以及Pt与载体Co 3 O 4之间的强相互作用。因此，我们的工作为设计高效，稳定的催化剂以减少低温下的VOC提供了一种通用策略。
更新日期：2019-06-18
中文翻译：
高活性稳定的Pt / Co3O4催化剂的合成及其在甲苯催化燃烧中的应用
催化燃烧已成为减少VOC的最经济，可行和有效的工具之一。但是，难以通过传统的湿法浸渍法，纳米粒子负载法等制备方法来制备兼具优异的催化活性和稳定性的负载型Pt催化剂。本文通过电置换法制备了具有高催化活性和稳定性的Pt / Co 3 O 4催化剂，用于甲苯的催化燃烧。作为比较，分别使用初始润湿浸渍法和纳米颗粒负载法制备了其他参考样品。所有样品均通过XRD，TEM，H 2 -TPR，O 2表征TPD和XPS技术。用电流置换法制备的催化剂在90％的甲苯转化温度约150°C（T 90 = 150°C）时表现出最佳的催化活性，并且在连续100 h的甲苯燃烧持续寿命试验中表现出出色的稳定性，而没有催化作用。与传统方法制备的相比，GHSV = 60 000 mL g –1 h –1时活性下降。这些结果归因于优异的氧迁移率，高表面化学吸附的氧种类浓度以及Pt与载体Co 3 O 4之间的强相互作用。因此，我们的工作为设计高效，稳定的催化剂以减少低温下的VOC提供了一种通用策略。
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