Hexagon-shaped composite made up of iron oxide [email protected] ([email protected]) was successfully synthesized at 185 °C by a simple hydrothermal method. All the analytical results confirmed the formation of [email protected] with a uniform size without apparent aggregation. The [email protected] composite exhibits excellent catalytic activity towards hydrogen evolution reaction (HER) with lowest onset-potential (−25 mV_RHE) and Tafel slope (45 mV dec⁻¹) in 0.5 M H₂SO₄ aqueous electrolyte. The high electrocatalytic performance of the composite towards HER attributes to the carbon decorated IONPs, providing a conducting network for fast electron transport from IONPs to electrodes. The composite shows high stability representing a synergistic effect between IONPs and carbon for efficient HER. In addition, the supernatant solution (byproduct) of [email protected] showed durable fluorescence activity and was used as a label-free fluorescent probe for live cell imaging applications. This method of synthesis is a simple and economic for multi-diverse applications. Thus, the main product of synthesized [email protected] might be an ideal choice for environmental-friendly applications HER and the byproduct for cell imaging.

通过简单的水热法成功地在185°C的温度下合成了由氧化铁[受电子邮件保护]（[受电子邮件保护]）组成的六边形复合材料。所有分析结果都证实，[电子邮件保护]的形成具有统一的大小，并且没有明显的聚集。[受电子邮件保护的]复合材料在0.5 MH ₂ SO _4中显示出极好的对氢释放反应（HER）的催化活性，具有最低的起始电位（−25 mV _RHE）和Tafel斜率（45 mV dec ^-1）。水性电解质。复合材料对HER的高电催化性能归功于碳修饰的IONP，为从IONP到电极的快速电子传输提供了导电网络。该复合材料显示出高稳定性，代表了IONP与碳之间的协同效应，可实现高效HER。另外，[电子邮件保护的]上清液（副产物）显示出持久的荧光活性，并用作活细胞成像应用中的无标记荧光探针。对于多种应用而言，这种合成方法既简单又经济。因此，合成的[受电子邮件保护]的主要产品可能是环保应用HER和细胞成像副产品的理想选择。