CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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First-principles study of oxygen adsorbed on Au-doped RuO2 (110) surface |
Ji Zhang(张季)1, De-Ming Zhang(张德明)1,2 |
1 An Hui Xin Hua University, Hefei 230088, China; 2 Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China |
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Abstract Density functional theory calculations are carried out to identify various configurations of oxygen molecules adsorbed on the Au-doped RuO2 (110) surface. The binding energy calculations indicate that O2 molecules are chemically adsorbed on the coordinatively unsaturated Ru (Rucus) sites and the bridge oxygen vacancies on the Au sites. Transition state calculations show that O* can exist on the Rucus site by O2* dissociation and diffusion. The calculations of the reaction path of CO indicate that the reaction energy barrier of CO adsorbed on Au with lattice oxygen decreases to 0.28 eV and requires less energy than that on the undoped structure.
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Received: 23 August 2019
Revised: 08 October 2019
Accepted manuscript online:
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PACS:
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61.66.Dk
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(Alloys )
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61.72.J-
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(Point defects and defect clusters)
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61.72.Bb
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(Theories and models of crystal defects)
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61.72.uj
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(III-V and II-VI semiconductors)
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Fund: Project supported by the Natural Science Foundation of Anhui Province, China (Grant Nos. KJ2018A0588 and KJ2019A0879). |
Corresponding Authors:
Ji Zhang
E-mail: coolfall123@126.com
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Cite this article:
Ji Zhang(张季), De-Ming Zhang(张德明) First-principles study of oxygen adsorbed on Au-doped RuO2 (110) surface 2019 Chin. Phys. B 28 116107
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