Lowering the PGM content of PEM Electrolysis by novel Electrocatalyst with superior Activity

Kurzfassung

Development of electrocatalyst for PEM electrolysis ist important to ascertain the sustainability of this technology. The main conclusions in this presentation are: • Lowering Ir metal content in MEAs is possible with more active catalyst and with supported catalyst • Cost-effective and environmentally friendly synthesis of anode catalysts for PEM electrolyzers • 5-fold higher activity of IrOx-Ir vs. Ir-black. The enhancement is attributed to the ligand effect and low coordinate sites • The use of SnO2:Sb-Aerogel allows decreasing more than 70 wt.% of Ir in the catalyst layer and improves stability • Electrochemical leaching of Ru from metallic Ir0.7Ru0.3 leads to 13-fold higher activity compared to the state-of-the-art Ir0.7Ru0.3O2