Splitting hydrazine into H₂ and N₂ by electro-catalyzing hydrogen evolution and hydrazine oxidation reactions is promising for replacing fossil energy with H₂. However, current hydrazine splitting is achieved using external powers to drive the two reactions, which is inapplicable to outdoor use. Here, Fe-doped CoS₂ nanosheets are developed as a bifunctional electrocatalyst for the two reactions, by which direct hydrazine fuel cells and overall-hydrazine-splitting units are realized and integrated to form a self-powered H₂ production system. Without external powers, this system employs hydrazine bifunctionally as the fuel of direct hydrazine fuel cell and the splitting target, namely a sole consumable, and exhibits an H₂ evolution rate of 9.95 mmol h^-1, a 98% Faradaic efficiency and a 20-h stability, all comparable to the best reported for self-powered water splitting. These performances are due to that Fe doping decreases the free-energy changes of H adsorption and adsorbed NH₂NH₂ dehydrogenation on CoS₂.

中文翻译：

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使用双功能肼作为自备动力的自备氢气生产。

通过电催化析氢和肼氧化反应将肼分解为H ₂和N ₂有望用H ₂代替化石能。然而，当前的肼分解是使用外部动力来驱动两个反应而实现的，不适用于室外。在这里，Fe掺杂的CoS ₂纳米片被开发为用于两个反应的双功能电催化剂，通过该功能，可实现直接肼燃料电池和整体肼分解单元的整合，形成自供电的H _2。生产系统。该系统无需外部电源，就可以双功能使用肼作为直接肼燃料电池和分裂目标（即唯一的消耗品）的燃料，并具有9.95 mmol h ^-1的H ₂释放速率，98％的法拉第效率和20 ^- H h稳定性，可与自供电水分解的最佳报告相媲美。这些性能是由于Fe掺杂降低了CoS ₂上的H吸附和NH ₂ NH ₂脱氢吸附的自由能变化。