张金赫,张昌武,王新鸽,程家威,石磊.自水解驱动PtZn/纳米AlN催化剂的合成及其丙烷脱氢性能研究[J].分子催化编辑部,2021,35(5):395-403
自水解驱动PtZn/纳米AlN催化剂的合成及其丙烷脱氢性能研究
Self-hydrolysis-driven Synthesis of Nanocrystalline Aluminum Nitride Supported Platinum-Zinc Catalyst for Propane Dehydrogenation
投稿时间:2021-06-23  修订日期:2021-07-19
DOI:10.16084/j.issn1001-3555.2021.05.001
中文关键词:  丙烷  催化脱氢  氮化铝  自水解  Pt-Zn簇
英文关键词:propane  catalytic dehydrogenation  aluminum nitride  self-hydrolysis  PtZn cluster
基金项目:国家自然科学基金项目(21872013)
作者单位E-mail
张金赫 大连理工大学 化工学院, 辽宁 大连 116024  
张昌武 大连理工大学 化工学院, 辽宁 大连 116024  
王新鸽 大连理工大学 化工学院, 辽宁 大连 116024  
程家威 大连理工大学 化工学院, 辽宁 大连 116024  
石磊 大连理工大学 化工学院, 辽宁 大连 116024 dlutshilei@dlut.edu.cn 
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中文摘要:
      采用纳米晶氮化铝(n-AlN)做载体,等体积浸渍法制备了系列PtM/n-AlN催化剂,其中M为Zn、Sn、In、Ga中的一种.丙烷脱氢性能测试显示Zn是最优助剂,同步提升了Pt/n-AlN催化剂的活性、选择性和稳定性.X射线粉末衍射(XRD)、扫描电镜(SEM)和N2物理吸附等手段证实水溶液浸渍会导致n-AlN表面水解,刻蚀出大量介孔空间,Zn助剂加剧了n-AlN表面水解,显著促进Pt的分散.球差校正扫描透射电镜(AC-STEM)结合X射线光电子谱(XPS)披露1~2 nm的低维Pt-Zn纳米簇是PtZn/n-AlN催化剂活性相.
英文摘要:
      Using nanocrystalline aluminum nitride (n-AlN) as support, a series of PtM/n-AlN catalysts were prepared by incipient impregnation method, where M is one of Zn, Sn, In, and Ga. Catalytic test in propane dehydrogenation showed that zinc was the best promoter, which simultaneously enhancedthe activity, selectivity and stability of Pt/n-AlN catalyst in propane dehydrogenation. X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and N2 physical adsorption revealed that aqueous solution impregnation triggered the hydrolysis of n-AlN surface, and etched a large amount of mesoporous space. Also, zinc promoter accelerated such a process, and remarkably promoted the dispersing state of platinum. Aberration-corrected scanning transmission electron microscopy (AC-STEM) combined with x-ray photoelectron spectroscopy (XPS) disclosed that the low-dimensional Pt-Zn alloy clusters with a size of 1~2 nm were catalytically active phases of the PtZn/n-AlN catalyst.
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