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Kim, Jeong Jin
나노물질 및 화학반응 연구단
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How Rh surface breaks CO2 molecules under ambient pressure

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Title
How Rh surface breaks CO2 molecules under ambient pressure
Author(s)
Jeongjin Kim; Ha, H.; Won Hui Doh; Ueda, K.; Mase, K.; Kondoh, H.; Mun, B.S.; Kim, H.Y.; Jeong Young Park
Publication Date
2020-12
Journal
NATURE COMMUNICATIONS, v.11, no.1, pp.5649
Publisher
NATURE PUBLISHING GROUP
Abstract
© 2020, The Author(s).Utilization of carbon dioxide (CO2) molecules leads to increased interest in the sustainable synthesis of methane (CH4) or methanol (CH3OH). The representative reaction intermediate consisting of a carbonyl or formate group determines yields of the fuel source during catalytic reactions. However, their selective initial surface reaction processes have been assumed without a fundamental understanding at the molecular level. Here, we report direct observations of spontaneous CO2 dissociation over the model rhodium (Rh) catalyst at 0.1 mbar CO2. The linear geometry of CO2 gas molecules turns into a chemically active bent-structure at the interface, which allows non-uniform charge transfers between chemisorbed CO2 and surface Rh atoms. By combining scanning tunneling microscopy, X-ray photoelectron spectroscopy at near-ambient pressure, and computational calculations, we reveal strong evidence for chemical bond cleavage of O‒CO* with ordered intermediates structure formation of (2 × 2)-CO on an atomically flat Rh(111) surface at room temperature
URI
https://pr.ibs.re.kr/handle/8788114/7515
DOI
10.1038/s41467-020-19398-1
ISSN
2041-1723
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
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