利用17O固体核磁共振波谱分析Ni/CeO2表面镍离子含量（英文）

Analysis of the Concentrations of Surface Ni Ions in Ni/CeO2 With17O Solid-State NMR Spectroscopy

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.