物理吸附
碳纳米管
化学吸附
催化作用
X射线光电子能谱
化学工程
分解
氢
材料科学
透射电子显微镜
纳米技术
化学
有机化学
工程类
作者
Li Wang,Jiuling Chen,Lei Ge,Victor Rudolph,Zhonghua Zhu
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2013-01-01
卷期号:3 (31): 12641-12641
被引量:18
摘要
This paper examines differences in the cooperative interaction between carbon nanotubes (CNTs) and Ru particles loaded on their internal/external surface. The techniques used were transmission electron microscopy, X-ray photoelectron spectroscopy, CO chemisorption, X-ray diffraction, N2 physisorption, hydrogen temperature-programmed reduction and two probe catalysis reactions, namely ammonia decomposition and preferential oxidation of CO in H2-rich atmosphere (PROX). The results show that the loading of highly dispersed Ru particles on CNTs does not change the structure of the CNTs. The cooperative interaction between Ru particles and associated CNT surfaces is dependent on the position of Ru particles and the surface functional groups of CNTs. Due to the electron-deficient structure of Ru particles confined inside CNT channels, they have an inferior ammonia decomposition activity to those deposited on the CNT external surface. For PROX, the catalytic performance of Ru particles confined inside CNT channels is superior compared to that over Ru particles deposited outside CNTs, which we attribute to the selective reactant enrichment of CO over H2 inside the CNTs.
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