Co9S8-Ni3S2@WS2 hierarchical yolk-shelled nanospheres as superior Pt-free catalytic materials for highly efficient dye-sensitized solar cells
| Autor: | Linchun Liu, Guoxiang Guan, Ming Chen, Xing Qian, Chao Zhang |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
chemistry.chemical_classification
Auxiliary electrode Materials science Sulfide General Physics and Astronomy Surfaces and Interfaces General Chemistry Condensed Matter Physics Surfaces Coatings and Films Catalysis law.invention chemistry.chemical_compound Dye-sensitized solar cell chemistry Transition metal Chemical engineering law Specific surface area Solar cell Bifunctional |
| Zdroj: | Applied Surface Science. 573:151606 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2021.151606 |
| Popis: | The hierarchical polymetallic sulfide electrocatalysts are endowed with high expectations in various energy conversion/storage fields. Herein, a facile two-step solvothermal method was employed to synthesize a series of hierarchical transition metal sulfide nanospheres with defined-well yolk-shelled structures (Co9S8-Ni3S2@WS2, Co9S8@WS2 and Ni3S2@WS2). Noteworthily, the resultant samples as the bifunctional electrocatalysts for the dye-sensitized solar cells possessed prominent electrocatalytic performances. Benefiting from the higher specific surface area, unique morphology, the synergistic effect of multi-elements and more favorable chemical compositions, the quaternary Co9S8-Ni3S2@WS2 nanospheres showed great advantaged features at promoting the reduction of triiodides in comparison with ternary Co9S8@WS2 and Ni3S2@WS2 nanospheres. Among these samples, the counter electrode with Co9S8-Ni3S2@WS2 catalysts exhibited a noteworthy power conversion efficiency of 9.67% for solar cell, which was much superior to that of Pt (8.16%). |
| Databáze: | OpenAIRE |
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