Abstract The Co2B alloy is synthesized by high temperature solid phase process. 5 wt% Pd is added to the Co2B alloy by ball milling at different milling time in order to enhance discharge performance of the raw alloy. The phase structure and surface morphology of these alloys is characterized by XRD and SEM. The discharge capacities of the alloy milled for 10 min and 30 min are higher than that of the raw alloy. However, the discharge capacity of the alloy milled for 1 h is lower than that of the raw alloy. The result of linear polarization and EIS shows that proper milling time and uniform distribution of palladium on the alloy surface can make the alloy electrode have excellent discharge capacity. Ball milling at appropriate time can make the palladium on the alloy surface uniformly distributed and the alloy particles do not aggregate, which increases the charge-transfer reaction rate and discharge capacity. The experimental results prove that the addition of palladium and proper ball milling can effectively improve the electrochemical hydrogen storage capacity of the Co2B alloy.

中文翻译：

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球磨时间和Pd添加量对Co2B合金电化学储氢性能的影响

摘要 Co2B合金是采用高温固相工艺合成的。通过球磨在不同的球磨时间将 5 wt% 的 Pd 添加到 Co2B 合金中，以提高原料合金的放电性能。这些合金的相结构和表面形貌通过 XRD 和 SEM 进行表征。研磨10分钟和30分钟的合金的放电容量高于原料合金的放电容量。然而，研磨 1 h 的合金的放电容量低于原始合金的放电容量。线极化和EIS结果表明，适当的球磨时间和钯在合金表面的均匀分布可以使合金电极具有优异的放电容量。适时球磨可使合金表面钯分布均匀，合金颗粒不聚集，这增加了电荷转移反应速率和放电容量。实验结果证明钯的添加和适当的球磨可以有效提高Co2B合金的电化学储氢能力。