Highly active hetero nanoparticles (NPs), Ag@Fe₃O₄ were synthesized and characterized. These hetero structured materials are formed by allowing a growth of silver NPs on a magnetite surface in the presence of an oleylamine. Thus developed material has been characterized through PXRD, TEM and SEM-EDX analysis. Further, these materials have been evaluated in the hydrogen evolution reactions (HER) in the presence of a weak electrolyte. The current density obtained for hydrogen evolution is − 10 mA cm⁻² at an over potential of 33 mV using these NPs.

中文翻译：

---

Ag @ Fe 3 O 4杂纳米粒子的合成与表征：氢析出反应的高活性催化剂

合成并表征了高活性异质纳米颗粒（NPs）Ag @ Fe ₃ O ₄。这些异质结构材料是通过在油胺存在下使银NP在磁铁矿表面上生长而形成的。这样开发的材料已经通过PXRD，TEM和SEM-EDX分析进行了表征。此外，在弱电解质的存在下，在放氢反应（HER）中评估了这些材料。使用这些NP时，在33 mV的过电势下，析氢产生的电流密度为− 10 mA cm ^-2。