ZnO (10(1)over-bar0) is unstable in moderate pressures of water

SURFACE SCIENCE

卷:715

Article

Wenzel, Sabine¹  Groot, Irene M. N.¹ 

[1] Leiden Inst Chem, POB 9502, NL-2300 RA Leiden, Netherlands

关键词: ZnO;    Single crystal;    Scanning tunneling microscopy;    In situ;    Methanol steam reforming;    Water;   

DOI  :  10.1016/j.susc.2021.121940

来源: Elsevier

【 摘 要 】

A ZnO(10 (1) over bar0) single crystal was investigated using in situ scanning tunneling microscopy and X-ray photoelectron spectroscopy. In roughly 1 mbar water the surface roughens within minutes. Hereby, the formation of (0001)- or (000 (1) over bar)-type steps is favored over the formation of (1 (2) over bar 10)-type steps. The roughened surface is stable in ultra-high vacuum and does not exhibit a different amount of hydroxylation or adsorbed water compared to the as-prepared surface. The speed of the roughening is related to the total volume of water supplied to the surface rather than the water pressure.

【 授权许可】

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