Visualizing electronic interactions between iron and carbon by X-ray chemical imaging and spectroscopy
Chen X, Xiao J, Wang J, Deng D, Hu Y, Zhou J, Yu L, Heine T, Pan X, Bao X (2015)
Publication Type: Journal article
Publication year: 2015
Journal
Book Volume: 6
Pages Range: 3262-3267
Journal Issue: 5
DOI: 10.1039/c5sc00353a
Abstract
The electronic interaction of a catalyst and its support is of vital importance to its catalytic performance. However, it is still a great challenge to directly probe the interaction due to the lack of well-defined models and efficient technical means. In this study, we report that pod-like carbon nanotubes with encapsulated iron particles (Pod-Fe) and scanning transmission X-ray microscopy (STXM) can be used as an ideal model and technique to study the electronic interaction between carbon shells and iron particles. The chemical imaging and spectroscopy of Pod-Fe by STXM show that the local electronic structures at C K-edge near edge (π∗) of carbon shells can be significantly modified by the encapsulated iron particles, which promotes the adsorption of oxygen-containing species, and thereby further modifies the electronic structure (π∗ and σ∗) of the carbon shells. Moreover, computed X-ray absorption near edge structure spectra (XANES) confirmed the electronic modifications of carbon shells by the encapsulated iron particles. The present study provides a direct evidence of electronic interactions with simultaneously collected images and spectra, which can promote the understanding towards the nature of active sites and supports.
Involved external institutions
Chinese Academy of Sciences (CAS) / 中国科学院
China (CN)
University of Saskatchewan
Canada (CA)
Jacobs University Bremen gGmbH
Germany (DE)
China (CN)
University of Saskatchewan
Canada (CA)
Jacobs University Bremen gGmbH
Germany (DE)
How to cite
APA:
Chen, X., Xiao, J., Wang, J., Deng, D., Hu, Y., Zhou, J.,... Bao, X. (2015). Visualizing electronic interactions between iron and carbon by X-ray chemical imaging and spectroscopy. Chemical Science, 6(5), 3262-3267. https://doi.org/10.1039/c5sc00353a
MLA:
Chen, Xiaoqi, et al. "Visualizing electronic interactions between iron and carbon by X-ray chemical imaging and spectroscopy." Chemical Science 6.5 (2015): 3262-3267.
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