Environmental-friendly recovery of critical metals from solid wastes directly for new energy materials received lots of concerns. In this paper, the FeMoO₄(FMO) materials for new energy storage materials are directly prepared from spent hydrogenation catalysts by “low temperature sodium roasting-water leaching” process. The leaching rates after roasting of main metal element Mo, Al and Ni from wastes are: 91.8 %, 1.7 % and 0.1 %, respectively, then the leachate was directly generated Al-doped FMO materials (Mo/Al = 50:1). As for the application of lithium ion battery anode, the specific capacity is 363.5 mAh/g after 200 cycles, 55 % improvement compared with bare FMO. The tunable phase transformation by roasting temperature regulation is the core to achieve the selective water leaching of Mo, and the intrinsic mechanism have been investigated by calculation and experiments. Finally, the economic evaluation of the whole process shows that for every 1 kg of spent catalyst processed and made into FMO, a profit of $20.8 can be obtained, indicating promising economic benefits. This process provides an environmental technology route for the development of new energy industries under carbon neutrality goals.

从固体废物中环保回收关键金属直接用于新能源材料受到广泛关注。本文以废加氢催化剂为原料，采用“低温钠焙烧-水浸”工艺直接制备了新型储能材料FeMoO _{4 (FMO)材料。}废弃物中主要金属元素Mo、Al、Ni经焙烧后浸出率分别为：91.8%、1.7%、0.1%，浸出液直接生成Al掺杂FMO材料（Mo/Al=50:1）。对于锂离子电池负极的应用，200次循环后比容量为363.5 mAh/g，比裸FMO提高了55%。通过焙烧温度调控实现相变可调是实现钼选择性水浸的核心，通过计算和实验研究了其内在机理。最后，对全流程进行经济评价，每处理1kg废催化剂制成FMO，可获得利润20.8美元，经济效益良好。这一过程为碳中和目标下的新能源产业发展提供了一条环保技术​​路线。