Al配位环境可变的氧化铝上负载Pt纳米颗粒状态对丙烷脱氢反应的影响研究  

Effect of Pt Nanoparticle State on Alumina with Flexible Al Coordination on Propane Dehydrogenation Reactions

作　　者：王翔 齐国栋 王强 徐君 邓风 WANG Xiang;QI Guodong;WANG Qiang;XU Jun;DENG Feng(National Center for Magnetic Resonance in Wuhan,State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院精密测量科学与技术创新研究院波谱与原子分子物理国家重点实验室武汉磁共振中心,湖北武汉430071 [2]中国科学院大学,北京100049

出　　处：《化学与生物工程》2024年第11期16-21,共6页Chemistry & Bioengineering

基　　金：国家重点基础研究发展计划资助项目(2022YFA1504500);中国科学院前瞻战略科技先导专项(XDB0540000);国家自然科学基金资助项目(22272185,22225205,22320102002,22127801);湖北省自然科学基金项目(2021CFA021)。

摘　　要：采用无模板剂水热法制备了Al配位可变和富含五配位铝(AlⅤ)物种的氧化铝载体(cf-Al_(2)O_(3)),以水为溶剂通过浸渍法制备了一系列Pt/cf-Al_(2)O_(3)催化剂,并研究了不同溶剂用量下Pt纳米颗粒在cf-Al_(2)O_(3)载体上的分布和落位及其对Pt/cf-Al_(2)O_(3)催化剂丙烷脱氢性能的影响。结果表明,溶剂可与cf-Al_(2)O_(3)载体上的AlⅤ发生作用导致载体Al配位环境重构,进而将Pt纳米颗粒包埋在载体内部;调控溶剂用量能有效控制cf-Al_(2)O_(3)载体表面Al配位环境的重构速率、Pt纳米颗粒粒径和包埋程度,进而获得高活性的丙烷脱氢催化剂。We firstly prepared alumina support(cf-Al_(2)O_(3))with flexible Al coordination and pentahedral Al(AlⅤ)-rich by a hydrothermal method in the absence of template agent,and then prepared a series of Pt/cf-Al_(2)O_(3)catalysts by using water as a solvent through an immersion method.Moreover,we studied the distribution and placement of Pt nanoparticles on cf-Al_(2)O_(3)support under different solvent dosages and its effect on propane dehydrogenation performance of Pt/cf-Al_(2)O_(3)catalyst.The results show that the solvent can interact with AlⅤon cf-Al_(2)O_(3)support,leading to reconstruction of the Al coordination environment and the encapsulation of Pt nanoparticles within the support.Adjusting the solvent dosage can effectively control the reconstruction rate of Al coordination environment on the surface of cf-Al_(2)O_(3)support,the size of Pt nanoparticles,and the embedding degree,facilitating the production of a highly active propane dehydrogenation catalyst.

关 键 词：Pt负载氧化铝 丙烷脱氢 金属活性位 配位环境 催化剂制备 

分 类 号：TQ211[化学工程—有机化工] TQ426.6