CTE / Proceedings 2025 / Closing the Recycling Loop of PEM Electrolyzer: Synthesis of Ir Precursor from Spent Electrocatalyst

Closing the Recycling Loop of PEM Electrolyzer: Synthesis of Ir Precursor from Spent Electrocatalyst

DOI: https://doi.org/10.23939/cte2025.01.360
Green Chemistry
pp.
360-363
Abstract

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.

Keywords (in English)
proton exchange membrane water electrolysis (PEMWE)
electrocatalyst
iridium
recycling
hydrometallurgy
precipitation
Author (co-authors)
First name Last name Institutional affiliation E-mail Phone number ORCID ID Academic status, position Institution address Author contribution(s) Institutional affiliation
Lesia
Sandig-Predzymirska
lesia.sandig-predzymirska@inemet.tu-freiberg.de
0000-0003-1155-6250
Dr. rer. nat., Group leader
Institute for Nonferrous Metallurgy and Purest Materials (INEMET), TU Bergakademie Freiberg, GERMANY, 09599 Freiberg, Leipziger Str. 34
Conceptualization
Data Curation
Formal Analysis
Investigation
Methodology
Writing – Original Draft Preparation
TU Bergakademie Freiberg
Alexandros
Charitos
alexandros.charitos@inemet.tu-freiberg.de
Prof., Institute director
Institute for Nonferrous Metallurgy and Purest Materials (INEMET), TU Bergakademie Freiberg, GERMANY, 09599 Freiberg, Leipziger Str. 34
Conceptualization
Funding Acquisition
Supervision
Writing – Review & Editing
TU Bergakademie Freiberg
References

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