Electrocatalytic materials for solid polymer electrolyte water electrolyzers

Abstract

In the present work the activity and stability of the IrOx/TiOx catalyst obtained by the polyol approach in the oxygen evolution reaction (OER) were studied in comparison with the commercial analogue IrOx. Electrochemical studies were provided, including accelerated stress testing. The synthesized IrOx/TiOx catalyst demonstrated higher OER activity and stability than the commercial IrOx, and the obtained results allow to suggest and discuss possible mechanisms of the studied catalysts degradation. Tests of membrane-electrode assemblies based on synthesized IrOx/TiOx catalysts in SPE water electrolyzer demonstrate the possibility to significantly reduce the noble metal content on the anode..

Supported Ir-Based Oxygen Evolution Catalysts for Polymer Electrolyte Membrane Water Electrolysis: A Minireview

“…This originates from the catalyst morphology (small IrO x particle size and uniform distribution), high intrinsic catalytic activity, and suggested amorphous nature of the deposited IrO x . In their further studies, 108 they provide the first insight into the OER stability of the obtained IrO x /Ti 4 O 7 , which is higher than for the commercial amorphous IrO x , assuming the MSI effect. An IrO x /Ti 4 O 7 hybrid catalyst with improved catalyst utilization has been proposed.…”