Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 24, Issue 71, Pages 19032-19037Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201804220
Keywords
dye-sensitized solar cells; electrocatalytic activity; Ni0.5Fe0.5S2/C; solvothermal method
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Funding
- National Science Fund for Distinguished Young Scholars [21425729]
- National Natural Science Foundation of China
- National Special S&T Project on Water Pollution Control and Treatment [2017ZX07107002]
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The incorporation of a foreign metal into a material may adjust the surface electronic structure and promote charge transfer, which then ultimately improves electrical conductivity and electrocatalytic performance because of the possible charge delocalization between the metal cations. As a result, for the first time, ternary nickel iron sulfide nanospheres have been successfully fabricated through a two-step solvothermal approach with the help of glucose (Ni0.5Fe0.5S2/C). Subsequently, the electrochemical performance and electrocatalytic activity of Ni0.5Fe0.5S2/C were evaluated by electrochemical impedance spectroscopy, Tafel polarization and cyclic voltammetry, indicating high electrical conductivity and great electrocatalytic activity. Ni0.5Fe0.5S2/C was employed as a counter electrode for dye-sensitized solar cells, and exhibited higher power conversion efficiency (6.79 %) than the device with Pt CE (6.31 %) under full sunlight illumination (100 mW cm(-2), AM 1.5G).
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