Electrochemical Research on N-Type and P-Type Semiconductor Pyrite

Abstract:

Studies on cyclic voltammetry, Tafel polarization curve and DFT calculations on N type and P type semiconductor pyrite in or out of bacterial solution were carried out. Cyclic voltammetry showed that the effect of bacterial was not simply in enrich the Fe³⁺ in the EPS. Tafel polarization curve research showed that bacteria can enhance the oxidation reaction sharply, no matter in the Fe³⁺ solution and in the bacteria solution, the corrosion current of N type pyrite was much bigger than that of P type pyrite. The DFT calculation shows that containing one Ni or Co atom means a more stable property, containing one As atom meaning a less stable property. However, an energy band around 5eV occurred in N type pyrite (contained Cu or Ni) meaning that N type pyrite is easier to be oxidation than P type pyrite.

• Periodical: Advanced Materials Research (Volume 1130)
• Pages: 179-182
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1130.179
• Online since: November 2015
• Authors: Jia Ning Xu, Hong Ying Yang*
• Keywords: Corrosion Current, DFT Calculations, Different Semiconductor Type Pyrite, Tafel Polarization Curve

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