Analysis of the Concentrations of Surface Ni Ions in Ni/CeO2 With 17O Solid-State NMR Spectroscopy

doi:10.11938/cjmr20192765

Abstract

Abstract: 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 the ¹⁷O 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.

Key words: Ni/CeO₂, ¹⁷O, solid-state NMR, surface, concentration

CLC Number:

O482.53

WANG Yang, YANG Chang-ju, WEN Yu-jie, CHEN Jun-chao, DU Jia-huan, PENG Lu-ming. Analysis of the Concentrations of Surface Ni Ions in Ni/CeO₂ With ¹⁷O Solid-State NMR Spectroscopy[J]. Chinese Journal of Magnetic Resonance, 2020, 37(1): 52-60.

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Analysis of the Concentrations of Surface Ni Ions in Ni/CeO₂ With ¹⁷O Solid-State NMR Spectroscopy

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