全文下载: 202401009.pdf
文章编号: 1672-6987(2024)01-0062-07; DOI: 10.16351/j.1672-6987.2024.01.009
胡恩政, 赵忠诚, 徐康, 徐东彦*(青岛科技大学 化工学院, 山东 青岛 266042)
摘要: 制备了介孔分子筛SBA-15,对其进行氨基功能化得到SBA-15-NH2载体,采用液相还原法制备了负载超细Pd纳米催化剂,利用X射线衍射仪(XRD)和透射电镜(TEM)对催化剂的结构和形貌进行了分析,并将制备的催化剂用于甲酸脱氢反应。结果表明,氨基的引入使得Pd纳米颗粒在载体上均匀分布,平均粒径仅为243 nm。在反应温度为313 K、甲酸/甲酸钠物质的量比为5∶3、甲酸浓度为5 mol·L-1的条件下,甲酸脱氢反应的表观TOF值可达5 610 h-1,氢气选择性接近100%。
关键词: 甲酸脱氢; SBA-15分子筛; 氨基功能化; Pd基催化剂
中图分类号: TQ 426文献标志码: A
引用格式: 胡恩政, 赵忠诚, 徐康, 等. Pd/SBA-15-NH2制备及其催化甲酸分解制氢[J]. 青岛科技大学学报(自然科学版), 2024, 45(1): 62-68.
HU Enzheng, ZHAO Zhongcheng, XU Kang, et al. Preparation of Pd/SBA-15-NH2 for catalytic dehydrogenation of formic acid[J]. Journal of Qingdao University of Science and Technology(Natural Science Edition), 2024, 45(1): 62-68.
Preparation of Pd/SBA-15-NH2 for Catalytic Dehydrogenation of Formic Acid
HU Enzheng, ZHAO Zhongcheng, XU Kang, XU Dongyan
(College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: The mesoporous silica SBA-15 was prepared and amino-functionalized to obtain a SBA-15-NH2 support. The Pd/SBA-15-NH2 catalyst with ultrafine Pd nanoparticles was prepared by liquid reduction method and used for the dehydrogenation of formic acid. The catalyst was characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The characterization results indicated that Pd nanoparticles are well dispersed on the surface of amino-functionalized SBA-15 and have a small mean particle size of 243 nm. The as-synthesized Pd/SBA-15-NH2 catalyst possesses superior activity and 100% H2 selectivity toward dehydrogenation of formic acid. A high apparent turnover frequency of 5 610 h-1 can be obtained at 313 K, formic acid/sodium formate ratio of 5∶3 and formic acid concentration of 5 mol·L-1.
Key words: dehydrogenation of formic acid; SBA-15; amine-functionalization; Pd-based catalyst
收稿日期: 2023-01-30
基金项目: 山东省自然科学基金项目(ZR2020MB028).
作者简介: 胡恩政(1997-),男,硕士研究生. *通信联系人.