The Fe nanoparticles embedded by graphitized carbon were developed through a strategy of hydrothermal and thermal treatment. The resulting materials, with high surface area and porosity, well dispersed iron nanoparticles (NPs) associated with graphitized carbon structure, show high activity and durability in ammonia decomposition reaction. Among the serial Fe-based catalysts, [email protected] of a low iron content (1.29 wt%) exhibits significant ammonia decomposition activity (∼71% conversion and 22.1 mol_H2 g_Fe⁻¹ h⁻¹) at a gas hourly space velocity of 6000 cm³g_cat⁻¹ h⁻¹ and 600 °C. After an extended period of reaction conducted over the representative [email protected] catalyst, most of the embedded Fe NPs transform to nitride species with relatively smaller particle size, while the embedded structure still retains. This study provides new insights into the development of cheap metal-based catalysts functionalized by graphitized carbon (graphene) for the current reaction and other potential applications.

通过水热处理和热处理策略开发了由石墨化碳包埋的铁纳米颗粒。所得的材料具有高的表面积和孔隙率，与石墨化碳结构相关的分散良好的铁纳米颗粒（NPs）在氨分解反应中显示出高活性和耐久性。在系列铁基催化剂中，低铁含量（1.29 wt％）的[经电子邮件保护]在气体时空速下表现出显着的氨分解活性（约71％的转化率和22.1 mol _H2 g _Fe ^-1  h ^-1）的6000 cm ³ g_猫^-1  h ^-1和600°C。在代表性的[受电子邮件保护的]催化剂上进行延长的反应时间后，大多数嵌入的Fe NP转变为粒径相对较小的氮化物，同时仍然保留了嵌入的结构。这项研究为目前的反应和其他潜在应用提供了开发廉价的基于金属的催化剂的新见解，这些催化剂已被石墨化的碳（石墨烯）功能化。