催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (8): 979-986.DOI: 10.1016/S1872-2067(10)60097-6

• 研究论文 • 上一篇    下一篇

Ru/CNFs 催化剂催化氨分解制氢

段学志 1, 周静红 1, 钱刚 1, 李平 1, 周兴贵 1, 陈德 2   

  1. 1 华东理工大学化学工程联合国家重点实验室, 上海 200237 2 挪威科技大学化学工程系, 特隆赫姆 7491, 挪威
  • 收稿日期:2010-04-06 出版日期:2010-08-30 发布日期:2013-12-26
  • 通讯作者: 陈德

Carbon Nanofiber-Supported Ru Catalysts for Hydrogen Evolution by Ammonia Decomposition

DUAN Xuezhi1, ZHOU Jinghong1, QIAN Gang1, LI Ping1, ZHOU Xinggui1,*, CHEN De2,#   

  1. 1State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China 2Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway
  • Received:2010-04-06 Online:2010-08-30 Published:2013-12-26

PDF

1347

摘要： 研究了鱼骨式碳纤维 (CNFs) 和管式碳纤维 (CNTs) 负载 Ru 催化剂的氨分解反应活性. 结果表明, Ru/CNFs 催化剂上氨分解活性高于 Ru/CNTs 催化剂. 通过改变 Ru 负载量或载体表面的含氧基团来调节 Ru 的粒径. Ru 的活性位随着 Ru 颗粒尺寸的增大而增加. CNFs 上的含氧基团对 Ru 颗粒的氨分解活性影响很大. 在相同粒径的 Ru 颗粒上, CNFs 表面的含氧基团增加了 Ru 的活性.

关键词: 碳纤维, 钌, 负载型催化剂, 氨分解, 氢气, 结构敏感性

Abstract: Carbon nanofibers (CNFs) with fish-bone graphene alignment and carbon nanotubes (CNTs) were used to support ruthenium for ammonia decomposition. The Ru nanoparticles on the CNF supports are more active than those on CNT supports. The Ru particle size was adjusted by changing the Ru loading or by introducing oxygen containing groups onto the CNF surface. The site activity increases when the Ru crystal size increases. The oxygen groups on the CNFs have a remarkable effect on ammonia decomposition over the Ru nanoparticles. On identically sized Ru crystals, oxygen on the CNFs clearly enhances ammonia decomposition over the Ru/CNFs.

Key words: carbon nanofiber, ruthenium, supported catalyst, ammonia decomposition, hydrogen, structure sensitivity