Supported Iridium-based Oxygen Evolution Reaction Electrocatalysts - Recent Developments

Leonard Moriau; Milutin Smiljanić; Anja Lončar; Nejc Hodnik

doi:10.1002/cctc.202200586

Supported Iridium-based Oxygen Evolution Reaction Electrocatalysts - Recent Developments

ChemCatChem. 2022 Oct 21;14(20):e202200586. doi: 10.1002/cctc.202200586. Epub 2022 Aug 24.

Authors

Leonard Moriau¹, Milutin Smiljanić¹, Anja Lončar^{1

2}, Nejc Hodnik^{1

2}

Affiliations

¹ Department of Materials Chemistry National Institute of Chemistry Hajdrihova 19 1001 Ljubljana Slovenia.
² University of Nova Gorica Vipavska 13 5000 Nova Gorica Slovenia.

Abstract

The commercialization of acidic proton exchange membrane water electrolyzers (PEMWE) is heavily hindered by the price and scarcity of oxygen evolution reaction (OER) catalyst, i. e. iridium and its oxides. One of the solutions to enhance the utilization of this precious metal is to use a support to distribute well dispersed Ir nanoparticles. In addition, adequately chosen support can also impact the activity and stability of the catalyst. However, not many materials can sustain the oxidative and acidic conditions of OER in PEMWE. Hereby, we critically and extensively review the different materials proposed as possible supports for OER in acidic media and the effect they have on iridium performances.

Keywords: Acidic media; Electrocatalysis; Iridium; Oxygen evolution reaction• Supported catalysts.

Publication types

Review