In this study, a fiber-shaped Co coating was electroplated on the Cu surface followed by the deposition of Pt crystallites using the galvanic displacement method. The electrochemical behavior of the prepared Co_fiber and Pt nanoparticles decorated Co_fiber catalysts were evaluated in order to provide insights into the electro-oxidation of N₂H₄ in an alkaline media was performed using cyclic voltammetry and chrono-techniques. The influence of Co_fiber/Cu and PtCo_fiber/Cu as the anode electrocatalyst on the performance of direct N₂H₄-H₂O₂ fuel cell was investigated at different temperatures. The deposition of a small amount of Pt crystallites, in the range of 5 μg_Pt cm^–2 to 29 μg_Pt cm^–2, significantly improved the performance of the fiber-shaped Co catalyst for the electro-oxidation of N₂H₄ in an alkaline medium. The measured N₂H₄ oxidation current densities at −0.2 V are approximately 5–6 times larger for different PtCo_fiber/Cu catalysts, compared with that of a pure Co_fiber/Cu. The single N₂H₄-H₂O₂ fuel cell results showed that the highest peak power density of 219.8 mW cm^–2 for the N₂H₄-H₂O₂ fuel cell was obtained with the PtCo_fiber/Cu catalyst that has the Pt loading of 28.7 μg_Pt cm^–2.

中文翻译：

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以Pt微晶修饰的纤维状钴作为阳极电催化剂的高性能直接N2H4-H2O2燃料电池

在这项研究中，将纤维状的Co涂层电镀在Cu表面上，然后使用电流置换法沉积Pt晶体。为了提供对使用循环伏安法和计时技术进行的碱性介质中N ₂ H ₄的电氧化的深入了解，对制备的Co_纤维和装饰有Pt纳米颗粒的Co_纤维催化剂的电化学行为进行了评估。Co_纤维/ Cu和PtCo_纤维/ Cu作为阳极电催化剂对直接N ₂ H ₄ -H ₂ O _{2性能的影响}在不同温度下对燃料电池进行了研究。铂微晶的少量的沉积，在5微克的范围内_的Pt厘米^-2至29微克_的Pt厘米^-2，显著改善了纤维状钴催化剂对于N的电氧化的性能₂ ħ ₄中碱性介质。与纯Co_纤维/ Cu相比，在不同的PtCo_纤维/ Cu催化剂下，在-0.2 V处测得的N ₂ H ₄氧化电流密度大约大5-6倍。单个N ₂ H ₄ -H ₂ O ₂燃料电池的结果表明，219.8毫瓦厘米的最高的峰值功率密度^-2对于N ₂ ħ ₄ -H ₂ ö ₂与载PtCo得到燃料电池用_纤维，其具有的Pt负载量/ Cu基催化剂28.7微克_的Pt厘米^-2。