This study investigates hydrometallurgical recycling of iridium (Ir) from proton exchange membrane (PEM) electrocatalyst - critical for Europe's decarbonization goals. Results demonstrate the efficient synthesis of ammonium hexachloroiridate ((NH4)2IrCl6) via precipitation, which serves as a precursor for new electrocatalysts, supporting circular economy strategies in PEM electrode production.
[1] European Commission. (2020). A hydrogen strategy for a climate-neutral Europe (COM 2020, 301 final).
[2] Kumar, S. S., & Lim, H. (2023). Recent advances in hydrogen production through proton exchange membrane water electrolysis – a review. Sustainable Energy & Fuels, 7, 3560–3583. DOI: 10.1039/D3SE00336A
[3] Melke, J., Maletzko, A., Gomez Villa, E. D., Bornet, A., Wiberg, G. K. H., Arenz, M., Sandig-Predzymirska, L., Thiere, A., Charitos, A., Stelter, M., Wang, Z., Pitscheider, S., Bertheussen, E., Pedersen, C. M., Finsdóttir, S., Kokborg, M. S., Berman, D. G., Dalvang, S., Müller, S. S., Seidel, F., Seselj, N., Höglinger, M., Kartusch, S., Eder, J., Macherhammer, M., Trattner, A., & Kallesøe, C. (2024). Recycalyse – New Sustainable and Recyclable Catalytic Materials for Proton Exchange Membrane Electrolysers. Chem. Ing. Tech., 96(1–2), 1–18. DOI: 10.1002/cite.202300143
[4] Clayton, J. A., & Walton, R. I. (2022). Development of New Mixed-Metal Ruthenium and Iridium Oxides as Electrocatalysts for Oxygen Evolution: Part II. Johnson Matthey Technol. Rev., 66(4), 406–417. DOI: 10.1595/205651322X16605694237357
[5] Burlakovs, J., Vincevica-Gaile, Z., Krievans, M., Jani, Y., Horttanainen, M., Pehme, K.-M., Dace, E., Setyobudi, R. H., Pilecka, J., Denafas, G., Grinfelde, I., Bhatnagar, A., Rud, V., Rudovica, V., Mersky, R. L., Anne, O., Kriipsalu, M., Ozola-Davidane, R., Tamm, T., & Klavins, M. (2020). Platinum Group Elements in Geosphere and Anthroposphere: Interplay among the Global Reserves, Urban Ores, Markets and Circular Economy. Minerals, 10, 558. DOI: 10.3390/min10060558
[6] Sandig-Predzymirska, L., Barreiros, T. V., Weigelt, A., Pitscheider, S., Pedersen, C. M., Kallesøe, C., Thiere, A., Stelter, M., & Charitos, A. (2025). Recovery of Platinum and Ruthenium from PEM Electrodes via Hydrometallurgical Approach. J. Sustain. Metall., 11, 145–159. DOI: 10.1007/s40831-025-01011-8
[7] Otgonbayar, U., Sandig-Predzymirska, L., Thiere, A., & Charitos, A. (2024). Solvent extraction of Pt, Ru, and Ir using Cyanex 923 in chloride media to develop a recycling route for spent polymer electrolyte membrane (PEM) electrolyzers. Hydrometallurgy, 226, 106303. DOI: 10.1016/j.hydromet.2024.106303
[8] Fine, D. A. (1970). Studies of the iridium(III) and (IV) - chloride system in acid solution. J. Inorg. Nucl. Chem., 32(8), 2731–2742. DOI: 10.1016/0022-1902(70)80323-2
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