Effect of palladium addition on electrochemical hydrogen storage properties of Co0.9Cu0.1Si alloy
| Autor: | Shang Gao, Heng Liu, Wanqiang Liu, Xiangjun Zhou, Yalan Guo, Zhongmin Su, Jianxun Zhao |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Kinetics Composite number Alloy chemistry.chemical_element 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry Electrocatalyst 01 natural sciences 0104 chemical sciences Hydrogen storage chemistry Chemical engineering engineering General Materials Science 0210 nano-technology Ball mill Palladium |
| Zdroj: | Solid State Sciences. 91:1-6 |
| ISSN: | 1293-2558 |
| DOI: | 10.1016/j.solidstatesciences.2019.02.011 |
| Popis: | Co0.9Cu0.1Si alloy was fabricated via mechanical alloying technique. Different amount of palladium was doped into the Co0.9Cu0.1Si alloy by ball milling. The composite alloy combined the excellent electrocatalysis activity of Pd, exhibiting preferable electrochemical performance than the original alloy. The Co0.9Cu0.1Si + 5 wt% Pd composite showed a Cmax of 559.2 mAh/g, significantly higher than that for Co0.9Cu0.1Si (502.1 mAh/g). The cycle stability was also enhanced after Pd loading. Moreover, the effect of ball milling time on electrochemical performance for the composite alloy was also investigated. 5 wt% Pd was mixed with the Co0.9Cu0.1Si alloy at different ball milling time (0.5 h, 1 h, 2 h, 3 h and 5 h). The optimal discharge capacity, capacity retention and high-rate dischargeability were obtained under the ball milling time of 2 h. The studies on electrochemical reaction kinetics demonstrated that the addition of Pd could accelerate the charge-transfer, thus enhancing the electrochemical activity and reaction kinetics of the alloy. The results indicated that Pd loading was an effective way in enhancing the electrochemical performance of Co0.9Cu0.1Si alloy. |
| Databáze: | OpenAIRE |
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