Citation: Zhi-Guo WANG, Ying-Ying DENG, Jiao-E DANG, Yong-Wei ZHANG, Li-Shan ZHANG, Xin A, Si-Ning YUN. Construction and Catalytic Properties of Fe/Cu Modified Nitrogen-Doped Carbon with Carbon Nanotube[J]. Chinese Journal of Inorganic Chemistry, ;2022, 38(11): 2181-2190. doi: 10.11862/CJIC.2022.234 shu

Construction and Catalytic Properties of Fe/Cu Modified Nitrogen-Doped Carbon with Carbon Nanotube

  • Corresponding author: Si-Ning YUN, yunsining@xauat.edu.cn
  • Received Date: 7 April 2022
    Revised Date: 20 September 2022

Figures(7)

  • Cu-modified nitrogen-doped carbon (Cu-N-C) and Fe/Cu-modified nitrogen-doped carbon with carbon nanotube (Fe/Cu-N-C/CNT) catalysts were prepared by in situ chemical synthesis combined with an ion exchange method. As counter electrode in dye-sensitized solar cells (DSSCs), the electrochemical properties and photovoltaic performance of these two catalysts in I3-/I- electrolyte were explored. The structure and morphology of as-prepared catalysts were characterized by X-ray diffraction (XRD), Raman spectra, X-ray photoelectron spectra (XPS), and field emission scanning electron microscope (FESEM). The results showed that the graphitization degree of Fe/Cu-N-C/CNT was higher than that of Cu-N-C, which is more favorable for charge transfer during I3- reduction process. The photovoltaic tests results showed that the DSSCs based on Fe/Cu-N-C/CNT CE achieved a power conversion efficiency (PCE) of 7.55%, higher than Cu-N-C (6.99%) and Pt (6.76%) under the same conditions. 50 cycles continuous cyclic voltammetry scanning showed that Fe/Cu-N-C/CNT had better electrochemical stability than Cu-N-C. This robust behavior can be mainly attributed to the synergistic effect between the bimetallic active sites (Fe/Cu) and the nitrogen-doped carbon network with CNTs, which results in a pronounced decrease in the charge-transfer resistance and superior device stability.
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