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Researchers at Brookhaven National Laboratory have used Hummingbird Scientific in-situ gas cell TEM and X-Ray specimen holders to characterize heterogeneous catalytic reactions. Their findings were published in the latest version of Nature Communications.
The STEM images are shown as measured in the operando mode, during different reaction regimes. Theoretical fits to EXAFS data included three contributions between Pt and their nearest neighbours. Images Copyright © 2015, Nature Communications.
By using correlated gas cell scanning transmission electron microscopy (STEM) and X-ray microscopy and spectroscopy they were able to quantitatively characterize catalytic activity of supported Pt catalysts. The capability of the Hummingbird Scientific gas cell to be transferred between the TEM and X-Ray microscope allowed a variety of probes to characterize a model catalytic reaction. This method can be broadly applied to study operando gas-reaction studies.
Reference:
Y. Li, D. Zakharov, S. Zhao, R. Tappero, U. Jung, A. Elsen, Ph. Baumann, R.G. Nuzzo, E.A. Stach & A.I. Frenkel, “Complex structural dynamics of nanocatalysts revealed in Operando conditions by correlated imaging and spectroscopy probes”. Nature Communications 6, Article number:7583doi:10.1038/ncomms8583, Published 29 June 2015
Copyright © 2015, Nature Communications.
