Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 121, Issue 32, Pages 17450-17456Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.7b04325
Keywords
-
Funding
- China Scholarship Council
- ERC advanced grant XRAYonACTIVE [340279]
- European Research Council (ERC) [340279] Funding Source: European Research Council (ERC)
Ask authors/readers for more resources
In-situ carbon-thermal reduction of cobalt oxide nanoparticles supported on carbon nanotubes was studied by cobalt 2p3d resonant inelastic X-ray scattering (RIXS). The in-situ 2p X-ray absorption spectroscopy (XAS) and RIXS measurements were performed at 500, 600, and 700 degrees C, where four consistent excitation energies were used for RIXS acquisitions. After 700 degrees C reduction, the XAS spectrum shows a cobalt metal-like shape, while the RIXS spectra reveal the minority cobalt monoxide phase. The holistic fit on both XAS and RIXS data reveals the respective contributions from metal and monoxide. We show that the relative precision to determine the monoxide content changes from similar to 5.6% in XAS results to better than 0.8% in the RIXS analysis, suggesting that RIXS is a useful tool to track the oxidation state of nanoparticles under in situ conditions. We determined a relative radiative ratio (P) factor of approximately 5, where this factor gives the ratio between the relative strengths of the radiative decay channels compared to the nonradiative channels in CoO and Co metal.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available