焙烧温度对Pt-FeOx/γ-Al2O3催化剂催化甲醛氧化性能的影响  

Effect of calcination temperature on catalytic performance of Pt-FeOx/γ-Al2O3 catalysts for HCHO oxidation

作　　者：崔维怡[1,2] 王希越[2] 谭乃迪[2] CUI Wei-yi;WANG Xi-yue;TAN Nai-di(The Key Laboratory of Chemical Cleaner Production Technology of Jilin Province,Jilin Institute of Chemical Technology,Jilin 132022,China;College of Chemical and Pharmaceutical Engineering,Jilin Institute of Chemical Technology,Jilin 132022,China)

机构地区：[1]吉林化工学院化工清洁生产技术吉林省高校重点实验室,吉林吉林132022 [2]吉林化工学院化学与制药工程学院,吉林吉林132022

出　　处：《燃料化学学报》2019年第8期964-972,共9页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(51805207);吉林省教育厅‘十三五’科学技术研究规划项目(JJKA20180559KJ);吉林市科技创新发展计划项目(201750211)资助~~

摘　　要：采用胶体沉积法制备了Pt-FeOx/γ-Al2O3催化剂,通过XRD、TEM、BET、XPS、H2-TPR和FT-IR等技术对催化剂进行了表征,考察了焙烧温度对Pt-FeOx/γ-Al2O3催化剂表面结构及其催化甲醛氧化性能的影响。结果表明,焙烧温度对Pt-FeOx/γ-Al2O3催化剂的氧化还原性能、Pt物种的化学状态以及表面羟基的数量有较大的影响。在室温下,所有Pt-FeOx/γ-Al2O3催化剂均表现出催化氧化活性,其中,200℃焙烧的Pt-FeOx/γ-Al2O3催化剂表现出最好的催化性能,可以将甲醛100%转化为CO2和H2O。较低温度焙烧的Pt-FeOx/γ-Al2O3催化剂表面Pt物种具有较好的价态分布以及更多的界面活性位,如Pt-O-Fe物种,因而在温和条件下对甲醛的催化氧化活性较高。A series of Pt-FeOx/γ-Al2O3 catalysts were prepared by colloid-deposition method and characterized by XRD,TEM,BET,XPS,H2-TPR and FT-IR to investigate the effects of calcination temperature on the surface structure of Pt-FeOx/γ-Al2O3 catalyst and its catalytic performance in catalytic HCHO oxidation.The characterization results showed that the applied calcination temperature greatly influenced the redox properties and chemical states of the Pt species,as well as the amount of surface hydroxyl groups.All resultant Pt-FeOx/γ-Al2O3 catalysts demonstrated activity in HCHO oxidation.The sample with calcination at 200℃exhibited the best performance,which afforded 100%conversion of HCHO into CO2 and H2O at room temperature.The catalysts with lower calcination temperature should be beneficial to have a better valence distribution of Pt species and produce more accessible interface active sites like Pt-O-Fe species,thus endowing Pt-FeOx/γ-Al2O3 catalyst with relatively high activity for the oxidation of formaldehyde under mild conditions.

关 键 词：甲醛 催化氧化 活性 焙烧温度 铂纳米粒子 

分 类 号：TQ426[化学工程]