Visualizing gas molecules interacting with supported nanoparticulate catalysts at reaction conditions |
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Authors: | Yoshida Hideto Kuwauchi Yasufumi Jinschek Joerg R Sun Keju Tanaka Shingo Kohyama Masanori Shimada Satoshi Haruta Masatake Takeda Seiji |
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Institution: | The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan. |
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Abstract: | Understanding how molecules can restructure the surfaces of heterogeneous catalysts under reaction conditions requires methods that can visualize atoms in real space and time. We applied a newly developed aberration-corrected environmental transmission electron microscopy to show that adsorbed carbon monoxide (CO) molecules caused the {100} facets of a gold nanoparticle to reconstruct during CO oxidation at room temperature. The CO molecules adsorbed at the on-top sites of gold atoms in the reconstructed surface, and the energetic favorability of this reconstructed structure was confirmed by ab initio calculations and image simulations. This atomic-scale visualizing method can be applied to help elucidate reaction mechanisms in heterogeneous catalysis. |
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