Issue 12, 2023

Towards electrochemical iridium recycling in acidic media: effect of the presence of organic molecules and chloride ions

Abstract

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 HClO4. Our results point towards the direction of destabilizing Ir at relatively mild conditions in acidic media.

Graphical abstract: Towards electrochemical iridium recycling in acidic media: effect of the presence of organic molecules and chloride ions

Supplementary files

Article information

Article type
Paper
Submitted
10 Nov 2022
Accepted
04 Mar 2023
First published
09 Mar 2023
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2023,13, 7980-7987

Towards electrochemical iridium recycling in acidic media: effect of the presence of organic molecules and chloride ions

L. Moriau, K. Stojanovski, P. Jovanovič, D. Escalera-López, S. Cherevko and N. Hodnik, RSC Adv., 2023, 13, 7980 DOI: 10.1039/D2RA07142H

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