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Journal of Central South University of Technology

, Volume 11, Issue 4, pp 385–390 | Cite as

Oxygen adsorption on pyrite (100) surface by density functional theory

  • Sun Wei 
  • Hu Yue-hua Email author
  • Qiu Guan-zhou 
  • Qin Wen-qing 
Article

Abstract

Pyrite (FeS2) bulk and (100) surface properties and the oxygen adsorption on the surface were studied by using density functional theory methods. The results show that in the formation of FeS2(100) surface, there exists a process of electron transfer from Fe dangling bond to S dangling bond. In this situation, surface Fe and S atoms have more ionic properties. Both Fe2+ and S2− have high electrochemistry reduction activity, which is the base for oxygen adsorption. From the viewpoint of adsorption energy, the parallel form oxygen adsorption is in preference. The result also shows that the state of oxygen absorbed on FeS2 surface acts as peroxides rather than O2.

Key words

density functional theory FeS2(100) surface surface relaxation oxygen adsorption sulfide flotation 

CLC number

TD952 O641.12+

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Copyright information

© Central South University 2004

Authors and Affiliations

  • Sun Wei 
    • 1
  • Hu Yue-hua 
    • 1
    Email author
  • Qiu Guan-zhou 
    • 1
  • Qin Wen-qing 
    • 1
  1. 1.School of Resources Processing and BioengineeringCentral South UniversityChangshaChina

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