The present article elucidates one-pot synthesis of Cs salt of iron substituted phosphomolybdate, its characterizations and application for styrene hydrogenation. The synthesized material was characterized by elemental analysis, TGA, FT-IR, FT-Raman, ESR, XPS and XRD. A detailed study was carried out for maximum conversion of styrene to ethylbenzene by optimizing different parameters such as solvent, catalyst amount, hydrogen pressure, time and temperature. The catalyst shows high efficiency (99% conversion) with low catalyst amount (5 mg, Fe: 0.02 mol%), EtOH: water (1:1) as green solvent, low pressure (5 bar) in EtOH: H₂O aqueous medium at room temperature only. The catalyst was easily recycled by simply centrifugation and reused for up to two cycles without any leaching or degradation. The present method is highly sustainable and green with no waste generation (E-factor = 0) with high Reaction mass efficiency (100%) as well as 100% atom economy. The role of water was confirmed by an isotope labeling experiment using D₂O as a solvent and a mechanistic study was investigated by ESR.

本文阐述了铁取代磷钼酸盐Cs盐的一锅法合成、表征及其在苯乙烯加氢中的应用。通过元素分析、TGA、FT-IR、FT-Raman、ESR、XPS和XRD对合成材料进行表征。通过优化溶剂、催化剂用量、氢气压力、时间和温度等不同参数，对苯乙烯向乙苯的最大转化率进行了详细研究。该催化剂显示出高效率（99% 转化率），催化剂用量低（5 毫克，铁：0.02 摩尔%），乙醇：水（1:1）作为绿色溶剂，乙醇中的低压（5 巴）：H ₂O 仅在室温下使用水性介质。催化剂通过简单的离心很容易回收，并重复使用最多两个循环而不会发生任何浸出或降解。本方法是高度可持续和绿色的，不产生废物（E 因子 = 0），具有高反应质量效率（100%）和 100% 原子经济性。通过使用 D ₂ O 作为溶剂的同位素标记实验证实了水的作用，并通过 ESR 研究了机理研究。