介孔碳负载高分散Fe-P催化剂的制备及其催化硝基苯加氢性能研究

开发低成本和高性能的加氢催化剂对于基础研究和工业应用具有重要意义。采用浸渍-热解策略，将Fe3+-植酸的络合物负载到介孔碳（MPC）表面热解处理，实现了一步法合成磷掺杂碳负载金属催化剂，并可通过调节Fe和植酸比例制得一系列具有不同结构的Fe-P/MPC催化剂。结合XPS、XRD、BET、SEM和TEM等表征技术，发现高分散的Fe-P催化剂（0.1Fe-P/MPC）具有最优的硝基苯加氢催化活性（TOF = 334 h-1），相较于单原子Fe1-P-C催化剂，活性提升了约7倍，同时该催化剂也展现出较高的稳定性，循环使用5次活性未见明显下降；而纳米金属磷化物Fe2P（0.5Fe-P/MPC）则几乎没有加氢活性。

Mesoporous Carbon Supported Highly Dispersed Fe-P Catalyst for Nitrobenzene Hydrogenation

The development of low-cost and high-performance hydrogenation catalysts is very important for academic research and industrial application. In this work, Fe-P/MPC (mesoporous carbon) catalysts with different structures were prepared by impregnation-pyrolysis method through regulating different ratios of Fe3+/phytic acid precursors. Combining with XPS, XRD, BET, SEM and TEM characterization, it was found that the highly dispersed Fe-P catalyst (0.1Fe-P/MPC) has the best catalytic activity (TOF = 334 h-1) for nitrobenzene hydrogenation, which is about 7 times higher than that of the single-atom Fe1-P-C catalyst. Furthermore, the catalyst cycle stability experiments confirmed that the 0.1Fe-P/MPC catalyst has good stability. In contrast, Fe2P (0.5Fe-P/MPC) has almost no hydrogenation activity.