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Defluorination and adsorption of tetrafluoroethylene (TFE) on TiO2(110) and Cr2O3(0001)

Gueriba JS 1 , Salehuddin NEA 2 , Diño WA 3 , Washika K 4 , Nakamura H 5 , Kawafuchi T 6

Affiliations 

  • 1 Department of Applied Physics, Osaka University, Suita, Osaka, 565-0871, Japan. [email protected]
  • 2 Department of Applied Physics, Osaka University, Suita, Osaka, 565-0871, Japan
  • 3 Department of Applied Physics, Osaka University, Suita, Osaka, 565-0871, Japan. [email protected]
  • 4 Laser Technology Laboratory, Hirotec Co., Ltd, 5-2-1 Ishiuchiminami, Saeki-ku, Hiroshima, 731-5197, Japan. [email protected]
  • 5 Research and Development Division, Technology Development Department, Charmant Inc., 6-8 Kawasari, Sabae, Fukui, 916-0088, Japan
  • 6 Laser Technology Laboratory, Hirotec Co., Ltd, 5-2-1 Ishiuchiminami, Saeki-ku, Hiroshima, 731-5197, Japan
Sci Rep, 2021 Nov 03;11(1):21551.
PMID: 34732746 DOI: 10.1038/s41598-021-00952-w

Abstract

Here, we show that metal oxide surfaces catalyze the formation of intermediate defluorinated tetrafluoroethylene (TFE) radicals, resulting in enhanced binding on the corresponding metal oxide surfaces. We attribute the preferential adsorption and radical formation of TFE on Cr2O3(0001) relative to TiO2(110) to the low oxygen coordination of Cr surface atoms. This hints at a possible dependence of the TFE binding strength to the surface stoichiometry of metal-oxide surfaces.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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