Electrocatalytic oxidation of ammonia provides a potential solution for on-board hydrogen supply for a fuel-cell vehicle. However, the lack of active, stable, and low-cost electrocatalysts restricts its application. Herein, we report a nanostructured catalyst of Cu₂O wire-in-Ni(OH)₂ plate passivated by a thin CuO surface, which can stably electrolyze alkaline ammonia solution into hydrogen and nitrogen at a high current density of 80 mA cm^–2 at room temperature. The improved performance is ascribed to the peculiar wire-in-plate nanostructure, which not only enhances the catalytic activity via a Ni–Cu synergistic interaction but also protects Cu₂O from oxidation and dissolution in the electrolyte.

中文翻译：

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纳米结构的线中板式电催化剂，用于高强度地从碱性氨溶液中生产氢和氮

氨的电催化氧化为燃料电池汽车的车载氢气供应提供了潜在的解决方案。但是，缺乏活性，稳定和低成本的电催化剂限制了其应用。本文中，我们报道了一种由CuO薄表面钝化的Cu ₂ O线内Ni（OH）₂板的纳米结构催化剂，该催化剂可以在80 mA cm ^–2的高电流密度下将碱性氨溶液稳定地电解成氢和氮。在室温下。改进的性能归因于特殊的板中线纳米结构，它不仅通过Ni-Cu协同作用增强了催化活性，而且还保护了Cu ₂ O免受氧化和溶解在电解质中。