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在复杂原料中电化学回收白金组金属的电氧复合物中定制选择性

Hee-Eun Kim¹, Wangsuk Oh¹, Amy Louise Bond²

¹Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States.

Environmental science & technology

|July 29, 2025

概括

新的氧化还原共聚合物可以有效地从矿石和催化转换器等复杂来源中回收白金组金属 (PGM). 这种电化学方法增强了PGM的分离和再生,证明了可持续金属采购的成本效益和稳定性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
化学工程是化学工程的重要组成部分.

背景情况:

组金属 (PGM) 对能源技术至关重要,但由于矿石质量下降和复杂的原料,它们面临着挑战.
有效和选择性的回收过程对于PGM净化和可持续采购至关重要.

研究的目的:

开发和评估用于选择性PGM化回收的氧化复合聚合物电吸收剂.
评估电化学再生的效率和开发材料的稳定性.
证明PGM从矿石和催化转化器的酸性液中回收的方法的适用性.

主要方法:

合成整合铁素部分和金属亲缘关系连接体的氧化还原共聚物.
选择性PGM化吸收的电吸收实验.
电化学辅助再生与pH驱动再生的比较.
在多个周期 (超过300个周期) 上进行稳定性测试.
回收过程的技术经济分析.

主要成果:

一种氧化还原共聚物实现了相对于的分离因子>20.
与pH驱动方法相比,电化学再生提高了90%以上的释放效率.
氧化还原聚合物在300个循环后保持了90%的吸收能力,显示出高稳定性.
从含有竞争性离子的高酸性液 (pH ~1) 直接证明了成功的PGM吸收.
技术经济分析表明,仅经过9个再生周期后,金的回收就成为可行的.

结论:

氧化共聚合物是一种有希望的,强大的,可调节的平台,用于从复杂的原料中选择性地回收金属.
电化学和pH波动再生的结合减少了化学投入,提高了成本效益.
这种方法为从具有挑战性的来源回收PGM提供了一个可持续和经济可行的解决方案.

关键词:

关键元素关键元素电化学分离电化学分离电吸收电吸收方式类金属是类金属中的一种.氧化还原复合物复合物

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