Moriau L, Stojanovski K, Jovanovič P, Escalera-López D, Cherevko S, Hodnik N
Department of Materials Chemistry, National Institute of Chemistry 1000 Ljubljana Slovenia
Center of Excellence Low-Carbon Technologies 1000 Ljubljana Slovenia.
RSC Adv. 2023 Mar 9;13(12):7980-7987. doi: 10.1039/d2ra07142h. eCollection 2023 Mar 8.
The utilization of iridium is expected to surge in the next few years, notably due to the rising implementation of water electrolyzer devices in the energy transition. However, the natural resources of this noble metal are extremely limited and thus its recycling will become of high importance. Unfortunately, iridium is also the most corrosion resistant platinum group metal, making its recovery from waste a difficult and energy-demanding process. Hereby, we study the impact of organics and chloride ions on the electrochemical dissolution of iridium in order to pave the way towards green recycling of this precious metal. We present a 40 times increased dissolution when cycling iridium in presence of HCl and 1 M ethanol compared to HClO. Our results point towards the direction of destabilizing Ir at relatively mild conditions in acidic media.
预计在未来几年铱的使用量将激增，特别是由于水电解槽装置在能源转型中的应用不断增加。然而，这种贵金属的自然资源极其有限，因此其回收将变得至关重要。不幸的是，铱也是最耐腐蚀的铂族金属，这使得从废料中回收铱成为一个困难且耗能的过程。在此，我们研究有机物和氯离子对铱电化学溶解的影响，以便为这种贵金属的绿色回收铺平道路。我们发现，与高氯酸相比，在盐酸和1 M乙醇存在的情况下对铱进行循环时，其溶解量增加了40倍。我们的结果表明，在酸性介质中相对温和的条件下使铱不稳定的方向。
