Publications

Influence of the Moiré Pattern of Ag(111)-Supported Graphitic ZnO on Water Distribution

Hung, T.-C. and Le, D. and Rahman, T. and Morgenstern, K.

JOURNAL OF PHYSICAL CHEMISTRY C
Volume: 126 Pages: 12500-12506
DOI: 10.1021/acs.jpcc.2c03274
Published: 2022

Abstract
The distribution of water on metal supported oxides is an important step in understanding heterogeneous catalysis such as in the water gas shift reaction. Here, we study water structures on Ag(111)-supported graphitic zinc oxide islands by variable temperature scanning tunneling microscopy around 150 K and ab initio calculations. Water clusters, accumulating on the ZnO islands, are confined to the hcp regions of the ZnO moiré pattern. A significantly higher cluster density at the island border is related to the dimensions of its capture zone. This suggests an upward mass transport of the water from the supporting metal to the ultrathin oxide film, increasing the water density at the active metal-oxide border. © 2022 American Chemical Society. All rights reserved.

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