期刊
NEW JOURNAL OF CHEMISTRY
卷 46, 期 30, 页码 14703-14710出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2nj02576k
关键词
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资金
- National Key R&D Program of China [2017YFA0403503]
- National Natural Science Foundation of China [11674001]
- Key Natural Science Research Program of Anhui Educational Committee [KJ2018ZD001]
In this study, a hydrothermal method combined with phosphate annealing was used to successfully prepare a MoO2/MoP heterostructure, which showed excellent electrical conductivity and catalytic activity. The DSSC fabricated with MoO2/MoP achieved a higher conversion efficiency compared to MoO2 and platinum.
Dye-sensitized solar cells (DSSCs) with cheap, simple, and fast preparation methods have attracted great interest from researchers as outstanding representatives of third-generation solar cells. To improve the applicability of dye-sensitized solar cells, the development of materials with high efficiency and low production cost is the top priority. In this work, the MoO2/MoP heterostructure was obtained by a hydrothermal method combined with phosphate annealing, and their electrochemical properties were further investigated. Compared with MoO2, the heterogeneous MoO2/MoP possessed superior electrical conductivity and catalytic activity. The DSSC fabricated with MoO2/MoP achieved an excellent conversion efficiency (PCE) of 8.64%, which was better than that of MoO2 (7.63%), and platinum (7.68%). The results verified that the novel structural engineering and good synergy between MoO2 and MoP make it have excellent electrocatalytic behavior. Meanwhile, in the MoO2/MoP heterostructure, a large number of nanosheets are distributed on the porous MoO2. The porous structure enhances the ion penetration, and the abundant nanosheets expand the contact surface with the electrolyte, providing a substantial active reaction surface and sufficient catalytically active sites for the catalytic reduction of I-3(-). Therefore, the MoO2/MoP nanocomposites with high efficiency, simple preparation, and low cost provide a possibility for the study of electrode materials.
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