原子层沉积制备Pt/TiO2催化剂及其在肉桂醛加氢中的应用  

Preparation of Pt/TiO_2 catalyst by atomic layer deposition and its application in hydrogenation of cinnamaldehyde

作　　者：郝佳伟 王眉花[1,2] 张淑芳 张佰艳[1,2] 覃勇 HAO Jia-wei;WANG Mei-hua;ZHANG Shu-fang;ZHANG Bai-yan;QIN Yong(State Key Laboratory of Coal Conversion,Institute of Coal Chemistry of Chinese Academy of Science,Taiyuan 030001,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院山西煤炭化学研究所,煤转化国家重点实验室,山西太原030001 [2]中国科学院大学,北京100049

出　　处：《现代化工》2018年第10期96-98,100,共4页Modern Chemical Industry

基　　金：国家自然科学基金(21403272)

摘　　要：利用原子层沉积技术在载体TiO_2上沉积尺寸均一的Pt纳米粒子得到Pt/TiO_2催化剂,研究了不同还原温度对其催化肉桂醛加氢性能的影响。结果表明,与未经高温还原的Pt/TiO_2相比,经700℃还原的催化剂Pt/TiO_2-700对肉桂醛的加氢活性提高了29.2%,对肉桂醇的选择性提高了40.5%。通过TEM、XPS和XRD等分析手段对催化剂的形貌、电子状态及晶体结构等进行表征,结果表明,高温还原有利于增大Pt纳米粒子和改变电子状态,从而提高其催化性能。The uniform Pt nanoparticles are deposited on TiO2 supporters by atomic layer deposition to prepare Pt/TiO2 catalyst.Effect of temperature on catalytic properties of Pt/TiO2 catalyst in the hydrogenation of cinnamaldehyde is studied.It is verified that compared with the Pt/TiO2 catalyst not reduced at high temperature,there is an increase of 29.2% for the hydrogenation activity for cinnamaldehyde over the Pt/TiO2 catalyst that has been reduced at 700℃ and an increase of 40.5% for the selectivity to cinnamyl alcohol.Transmission electron microscopy（TEM）,X-ray photoelectron spectroscopy（XPS） and powder X-ray diffraction（XRD） are used to characterize the morphology,electronic stats and crystal structure of Pt/TiO2-700 catalyst,and the results state that high temperature reduction is beneficial to the increase of Pt nanoparticles＇ size and the change of the electronic state,and therefore promotes catalytic performances.

关 键 词：PT/TIO2 肉桂醛 选择性加氢 原子层沉积 

分 类 号：O643.38[理学—物理化学]