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Morphology-dependent catalysis on nanostructures Fe2O3@MWCNT as Pt-free counter electrode for dye-sensitized solar cells.
- Source :
-
International Journal of Hydrogen Energy . Oct2023, Vol. 48 Issue 86, p33571-33579. 9p. - Publication Year :
- 2023
-
Abstract
- The doped transition metal oxides (TMOs) substitute for the traditional Pt as the counter electrode (CE) catalyst is a unique way to reduce the cost and improve the power conversion efficiency (PCE) of dye-sensitized solar cells (DSSCs). Herein, four different morphologies and size of Fe 2 O 3 (nanodiscus (ND), nanocubes (NC), nanorings (NR), nanoball (NB)) assisted by multi-walled carbon nanotube (MWCNT) to prepare Fe 2 O 3 @MWCNT composites, and then were further utilized in the encapsulated DSSCs. The obtained different morphologies Fe 2 O 3 @MWCNT composites had been characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and N 2 adsorption-desorption. The significant effects of different morphologies of Fe 2 O 3 on the electrochemical activity of Fe 2 O 3 @MWCNT composites as CEs were confirmed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and Tafel polarization experiments. The DSSCs using Fe 2 O 3 @MWCNT composites CEs achieved high PCEs of 6.34 (ND), 6.53(NC), 6.65(NR), and 7.09% (NB) to regenerate traditional I 3 −/I− shuttles by the photocurrent-photovoltage (J - V) test, respectively, which is due to the synergistic effect between Fe 2 O 3 and MWCNT to improve electrical conductivity and promote a high number of active catalytic sites, implying a remarkable alternative of Pt-free catalyst that can be applied to the encapsulated DSSCs as CEs. • Four different morphologies and size of Fe 2 O 3 @MWCNT composites were prepared. • Fe 2 O 3 @MWCNT composites were designed as counter electrode for DSSCs. • The DSSCs with Fe 2 O 3 @MWCNT composites CEs achieved higher PCEs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 48
- Issue :
- 86
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 172347245
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2023.05.133