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Published on: July 27, 2022
Observation of NO molecules adsorbed on Rh cluster anions at different temperatures using photoelectron spectroscopy
Masato Yamaguchi1, Keitaro Tatsukawa1, Fumitaka Mafuné1
1Department of Basic Science, School of Arts and Sciences, The University of Tokyo, Komaba, Meguro, Tokyo 153-8902, Japan.
Abstract:
Rh nanoparticles are often used as catalysts for reducing NO at high temperatures (∼500 K) via dissociation of the NO bond. In this study, utilizing a newly developed setup, we performed photoelectron spectroscopy on RhnNO- (cluster size, n = 3-7) clusters at temperatures ranging from 300 to 800 K. The observed temperature-dependent spectral changes were concluded to arise from an increase in internal energy caused by heating, leading to dissociation of the NO bond on the cluster surface. This observation offers direct spectroscopic evidence of thermally activated surface chemistry in gas-phase clusters.
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