Influence of iridium oxide loadings on the performance of PEM water electrolysis cells: Part I–Pure IrO 2 -based anodes
2015; Elsevier BV; Volume: 182; Linguagem: Inglês
10.1016/j.apcatb.2015.09.013
ISSN1873-3883
AutoresCaroline Rozain, Eric Mayousse, Nicolas Guillet, Pierre Millet,
Tópico(s)Electrocatalysts for Energy Conversion
ResumoThe influence of iridium oxide loadings at the anode of PEM water electrolysis cells on the overall electrochemical performance was studied using cyclic voltamperometry and electrochemical impedance spectroscopy, and by measuring polarization curves at 80 °C. Membrane electrode assemblies with reduced metal loadings (0.25 mg cm−2 of Pt at the cathode and 0.5 mg cm−2 of IrO2 at the anode) were prepared using the decal method. A typical cell voltage of 1.72 V was recorded using a 25 cm2 cell with a Nafion® 115 membrane at a current density of 1 A cm−2 (at 80 °C and atmospheric pressure). Performances measured with such reduced noble metal loadings are similar to those obtained with conventional loadings of several mg cm−2.
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