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MoOx促进的Pt基催化剂用于低温水汽变换反应

许学俊 ,  傅强 包信和 , 

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引用本文: 许学俊, 傅强 包信和,  MoOx促进的Pt基催化剂用于低温水汽变换反应[J]. 催化学报, 2015, 36(5): 750-756. doi: 10.1016/S1872-2067(14)60294-1 shu
Citation:  Xuejun Xu, Qiang Fu, Xinhe Bao. MoOx-promoted Pt catalysts for the water gas shift reaction at low temperatures[J]. Chinese Journal of Catalysis, 2015, 36(5): 750-756. doi: 10.1016/S1872-2067(14)60294-1 shu

MoOx促进的Pt基催化剂用于低温水汽变换反应

    通讯作者: Qiang Fu; Qiang Fu
  • 基金项目:

    国家自然科学基金(21222305, 21321001, 21103181) (21222305, 21321001, 21103181)

    国家重点基础研究发展计划(973计划, 2013CB834603, 2013CB933100, 2011CBA00503). (973计划, 2013CB834603, 2013CB933100, 2011CBA00503)

摘要: 通过浸渍还原法制备了不同比例的Pt-Mo/SiO2催化剂, 采用X射线衍射、透射电镜、X射线近边吸收谱和X射线光电子能谱表征了Pt-Mo/SiO2催化剂的组成、结构及价态. 研究结果表明, 少量MoOx修饰Pt-Mo/SiO2催化剂在低温水汽变换反应中表现出比Pt/SiO2催化剂更高的催化活性, 过量MoOx包覆的Pt-Mo/SiO2催化剂活性较低. 低温水汽变换反应活性来自于Pt与表面MoOx的界面协同作用, 限域在Pt纳米颗粒表面的MoOx表现出较低价态, 高分散MoOx纳米岛修饰的Pt纳米颗粒是低温水汽变换反应的活性结构.

English

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  • 发布日期:  2015-05-20
  • 收稿日期:  2014-12-15
  • 网络出版日期:  2015-01-19
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