高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (9): 1619-1626.doi: 10.7503/cjcu20170092

• 物理化学 • 上一篇    下一篇

配位还原制备膦酸功能化Pd/C催化剂及其应用

闫晓红, 葛霞, 张琳, 齐丽娟, 刘洋, 魏少华, 朱晓舒, 唐亚文   

  1. 江苏省新型动力电池重点实验室, 江苏省生物医药功能材料协同创新中心, 南京师范大学化学与材料科学学院, 南京 210023
  • 收稿日期:2017-02-18 出版日期:2017-09-10 发布日期:2017-08-17
  • 通讯作者: 唐亚文,男,博士,教授,博士生导师,主要从事纳米材料的制备及应用方面的研究.E-mail:tangyawen@njnu.edu.cn E-mail:tangyawen@njnu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:21376122,21576139)资助.

Preparation of Phosphoric Acid-functionalized Pd/C Catalyst by Coordination Reduction and Its Application

YAN Xiaohong, GE Xia, ZHANG Lin, QI Lijuan, LIU Yang, WEI Shaohua, ZHU Xiaoshu, TANG Yawen   

  1. Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
  • Received:2017-02-18 Online:2017-09-10 Published:2017-08-17
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.21376122, 21576139).

摘要:

采用活性炭为载体,乙二胺四亚甲基膦酸(EDTMPA)作为配位剂和稳定剂,氯化钯(PdCl2)为前驱体,硼氢化钠(NaBH4)为还原剂,通过一步还原制备得到膦酸功能化的超细高分散Pd/C催化剂.透射电子显微镜(TEM)及X射线衍射(XRD)分析结果表明,制得的Pd/C催化剂中Pd粒子的平均粒径为2.7 nm,分散度为37.1%,高于同类型商业化催化剂.制得的催化剂对罗丹明(RhB)和对硝基苯酚(4-NP)的催化加氢反应的活化能分别为27.18和16.79 kJ/mol,明显低于商业化Pd/C催化剂(57.12和55.71 kJ/mol).

关键词: Pd/C催化剂, 乙二胺四亚甲基膦酸, 配合物, 催化加氢

Abstract:

We presented a one-step reduction approach to the synthesis of highly dispersed and ultrafine phosphonate functionalized Pd nanoparticles supported by carbon(Pd/C) using XC-72 as the catalyst support, ethylenediamine tetramethylene phosphonic acid(EDTMPA) as both coordination agent and stabilizer, palladium chloride(PdCl2) as the precursor and sodium borohydride(NaBH4) as the reducing agent, respectively. Transmission electron microscopy(TEM) and X-ray diffraction(XRD) analysis results indicated that the average particle size and the dispersion degree in the Pd/C catalysts are 2.7 nm and 37.1%, respectively, much higher than those of the commercial catalysts. The activation energy of catalytic hydrogenation for rhodamine(RhB) and p-nitrophenol(4-NP) for the obtained catalyst are calculated to be 27.1 and 16.9 kJ/mol, respectively, obviously lower than those in the commercial Pd/C catalyst(57.2 and 55.7 kJ/mol).

Key words: Pd/C catalyst, Ethylenediamine tetramethylene phosphonic acid(EDTMPA), Complex, Catalytic degradation

中图分类号: