Iridium Stabilizes Ceramic Titanium Oxynitride Support for Oxygen Evolution Reaction
The transition to renewable energy sources through hydrogen technologies involves the electrolysis of water. Polymer electrolyte membrane (PEM) electrolysis represents a highly efficient, responsive, dynamic and convenient solution for storing large quantities of electricity in the form of hydrogen to cover the gap between the production of renewable energy (the sun and the wind) and the demand of the network at different time periods (day / night and summer / winter). The authors reveal a new concept to improve the electrochemical stability of OER support which is based on iridium-support interactions which can lead to up to 10 fold increase in support’s stability. The elucidation of this finding was delivered due to complementary exploitation of cutting edge electrochemical and structural characterization as well as theoretical calculations. Ultimately, the stability approach can provide a relevant means to improve the long-term operation of PEM electrolysers.
For financing the research, the authors acknowledge the support by, Slovenian research agency (ARRS), European Research Council (ERC), European Union (Horizon 2020) as well as NATO Science for Peace and Security Program.