L. Sandig‑Predzymirska, T. Veiga Barreiros
The recovery of platinum group metals (PGMs) from secondary sources is becoming increasingly relevant from an economic and environmental perspective. This study aims to explore a hydrometallurgical approach for recycling platinum (Pt) and ruthenium (Ru) from proton exchange membrane (PEM) electrodes. The methodology includes a comprehensive recycling scheme comprising pre-treatment, leaching, volatilization, and precipitation processes. A parametric study was conducted to examine various factors influencing the recovery yields, such as reagent concentration, leaching temperature, and solid-to-liquid ratio. The results showed high recovery rates, achieving 90% for Pt and 82% for Ru after 4 hours of leaching at 75 °C in 4 M HCl with the addition of 1.5 M AlCl3. Two methods were implemented for Pt/Ru separation: Ru volatilization and selective Pt precipitation. The use of 1 M Na2S2O8 for Ru volatilization resulted in a complete recovery (up to 100%) in just 1.5 hours. Moreover, selective precipitation of Pt was accomplished with 5 M NH4Cl, resulting in up to 96% Pt recovery within 30 minutes while only minimal Ru precipitation occurred. This efficient recycling procedure allows for the reuse of obtained PGM salts as precursors for manufacturing new electrocatalysts.
@article{e062db93-05a6-4e09-abb3-6023dcc21370,
title={2025 Sandig Predzymirska Platinum and Ruthenium Recovery from PEM Electrodes},
author={L. Sandig‑Predzymirska and T. Veiga Barreiros},
year={2026},
language={en}
}TY - JOUR TI - 2025 Sandig Predzymirska Platinum and Ruthenium Recovery from PEM Electrodes AU - L. Sandig‑Predzymirska AU - T. Veiga Barreiros PY - 2026 LA - en ER -
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