Earth abundant ZnO/CdS/CuSbS2 core-shell nanowire arrays as highly efficient photoanode for hydrogen evolution
| Autor: | Xianfeng Yang, Rong-Rong Su, Wei-De Zhang, Yu-Xiang Yu, Yong-Hao Xiao |
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| Rok vydání: | 2018 |
| Předmět: |
Photocurrent
chemistry.chemical_classification Materials science Sulfide Renewable Energy Sustainability and the Environment Band gap business.industry Nanowire Energy Engineering and Power Technology 02 engineering and technology Electron Electrolyte Molar absorptivity 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Fuel Technology chemistry Percolation Optoelectronics 0210 nano-technology business |
| Zdroj: | International Journal of Hydrogen Energy. 43:6040-6048 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2018.02.007 |
| Popis: | CuSbS2 is regarded as a promising photo-absorber for solar energy conversion due to its proper bandgap, high absorptivity and earth abundance. Herein, novel low-cost ZnO/CdS/CuSbS2 core-shell nanowire arrays were constructed as photoanode for hydrogen evolution through non-aqueous electrodeposition and cation exchange. The nanowire demonstrates even and compact multilayer structure. The optimal ZnO/CdS/CuSbS2 photoanode achieves a photocurrent of 6.48 mA/cm2 at 0 V versus Ag/AgCl and the remarkable IPCE value with approximately 52% at 480 nm in an electrolyte solution containing 0.35 mol/L Na2SO3 and 0.25 mol/L Na2S. It also exhibited a good stability, maintained 87.9% of the initial current after 1 h measurement. The high performance benefits from well-crystalline and compact multilayer structure, high absorptivity of CuSbS2 and CdS, p-n junction formed between CdS and CuSbS2 which promotes the electron-hole separation and ZnO nanowire array as three dimensional scaffolds for electron percolation pathway. This work suggests the potential applications of low-cost p-n junction core-shell nanowire arrays as a highly efficient photoanode for hydrogen evolution in oil-field waste water with reductive sulfide. |
| Databáze: | OpenAIRE |
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