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Herein, the Fe3C nanoparticles encapsulated in carbon nanotubes (Fe3C/CNTs) were successfully prepared through a simple method using g‐C3N4 from thermal polymerization of melamine. The structure, morphology and magnetic properties of the prepared samples were investigated by various technologies. The results show that the Fe3C nanoparticles encapsulated in carbon nanotubes exhibit good magnetic properties with high saturated magnetization (83.7 emu g−1). Importantly, this simple approach provides a way to synthesize metal carbides encapsulated in carbon nanotubes. [ABSTRACT FROM AUTHOR]

Three different transition metal elements doped Fe3N were prepared by a simple path. Their structure, morphology, and magnetic properties were carefully investigated by X‐ray diffraction, transmission electron microscopy as well as vibrating sample magnetometer. Moreover, we detailedly compared and analyzed the impact of different transition metal elements on the properties of Fe3N. Combining with the results of analysis and comparison, it indicates that this simple method can be used to explore the impact on the transition metal nitride incorporated with different transition metal elements in the carbon‐rich system. [ABSTRACT FROM AUTHOR]

Fe3N@C doped with B nanomaterials were prepared by the gas–solid method based on ethylenediamine nitridation. The materials show rod‐like morphology, and the Fe3N nanoparticles are coated by a graphite carbon layer with a thickness of 5 nm. Moreover, B‐doped Fe3N@C nanomaterials exhibit good soft magnetic properties. They are powerful catalysts for the hydrogen evolution reaction in 1.0 m KOH. The overpotential of the 20% B‐doped Fe3N@C magnetic nanomaterial at 10 mA cm−2 is only 216 mV, and Tafel slope is 133 mV dec−1. They are promising as a non‐noble metal catalyst for practical hydrogen evolution reaction. [ABSTRACT FROM AUTHOR]

Black polycrystalline ε-Fe3N is precipitated from an anhydrous solution of FeCl3 in acetone to which different amounts of en are added as the nitrogen source prior to a calcination under N2 (560 °C, 30 min). [ABSTRACT FROM AUTHOR]