摘要
本文以具有重要催化应用前景的Ni/CeO2体系为例,借助17O固体核磁共振波谱技术,根据表面氧物种17O NMR信号的变化,尝试分析了Ni/CeO2表面层中镍离子的含量.分析结果显示,10%NiCe-500和20%NiCe-300两种Ni/CeO2样品表面第一和第二金属离子层中Ni离子的含量分别位于9%~17%和8%~15%范围内.这一方法或可推广至研究其它一系列顺磁掺杂氧化物的表面掺杂含量.
With Ni/CeO2 as an example,which has important applications in catalysis,17O solid-state nuclear magnetic resonance(NMR) spectroscopy was applied to explore and analyze the concentration of surface Ni ions,according to the changes in the17O NMR intensity of surface oxygen ions.The results indicate that the Ni concentrations in the first and second top metal ion layers in 10% NiCe-500 and 20% NiCe-300 are within the ranges of 9%~17% and 8%~15%,respectively.This approach may be extended to study the concentration of the doped paramagnetic elements in the surface for a variety of doped oxide materials.
作者
王杨
杨昌菊
温玉洁
陈俊超
杜佳欢
彭路明
WANG Yang;YANG Chang-ju;WEN Yu-jie;CHEN Jun-chao;DU Jia-huan;PENG Lu-ming(Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences,School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210023,China)
出处
《波谱学杂志》
CAS
北大核心
2020年第1期52-60,共9页
Chinese Journal of Magnetic Resonance
基金
the National Natural Science Foundation of China(91745202,21573103,21661130149)