催化学报 ›› 2015, Vol. 36 ›› Issue (11): 1837-1845.DOI: 10.1016/S1872-2067(15)60963-9

• 论文 • 上一篇    下一篇

碱金属助剂对N2O直接分解催化剂NiO活性的促进作用

Bahaa M. Abu-Zieda,b,c, Abdullah M. Asiria,c   

  1. a 阿卜杜勒阿齐兹国王大学高级材料杰出研究中心, 吉达21589, 沙特阿拉伯;
    b 艾斯尤特大学理学院化学系, 艾斯尤特71516, 埃及;
    c 阿卜杜勒阿齐兹国王大学理学院化学系, 吉达21589, 沙特阿拉伯
  • 收稿日期:2015-05-05 修回日期:2015-08-21 出版日期:2015-11-02 发布日期:2015-11-02
  • 通讯作者: Bahaa M. Abu-Zied. 电话: +96-563737563;传真: +96-626952292; 电子信箱: babuzaid@kau.edu.sa, babuzied@aun.edu.eg,babuzied@yahoo.com

The role of alkali promoters in enhancing the direct N2O decomposition reactivity over NiO catalysts

Bahaa M. Abu-Zieda,b,c, Abdullah M. Asiria,c   

  1. a Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah 21589, Saudi Arabia;
    b Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt;
    c Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
  • Received:2015-05-05 Revised:2015-08-21 Online:2015-11-02 Published:2015-11-02

摘要:

考察了一系列碱金属促进和未促进的NiO催化剂上N2O直接分解反应性能, 并采用X射线衍射, X射线光电子能谱(XPS)和前场扫描电镜对这些催化剂进行了表征. XPS结果表明, 催化剂表面的Ni以金属颗粒, NiO和Ni(OH)2三种形式存在. 研究发现, 在催化剂表面主要是Ni0原子与N2O分子发生相互作用. 未促进的NiO催化剂表现出非常低的催化N2O分解活性; 碱金属的加入使得NiO催化剂活性大大提高.

关键词: 一氧化二氮分解, 温室气体, 氧化镍, 碱金属促进, 活性增加

Abstract:

Direct N2O decomposition has been investigated over bare NiO and a series of its alkali-promoted catalysts. These catalysts were characterized by X-ray diffractometry, X-ray photoelectron spectroscopy (XPS) and field emission scanning electron microscopy. XPS analysis revealed that surface nickel is present in three forms: metal particles, NiO and Ni(OH)2. It is suggested that nickel(0) valent atoms are essential for the interaction with N2O molecules at the catalyst surfaces. Bare NiO exhibited a very low N2O decomposition reactivity. However, the alkali-containing catalysts exhibited a marked activity enhancement.

Key words: N2O decomposition, Greenhouse gas, NiO, Alkali-promotion, Activity enhancement