Investigation of NiFe-Based Catalysts for Oxygen Evolution in Anion-Exchange Membrane Electrolysis

Energies

Stefano Trocino¹  Massimiliano Lo Faro¹  AntoninoSalvatore Aricò¹  Sabrina Campagna Zignani¹ 

[1] Institute for Advanced Energy Technologies “Nicola Giordano” (ITAE) of the Italian National Research Council (CNR), 98126 Messina, Italy;

关键词: oxygen evolution reaction;    anion-exchange membranes;    alkaline electrolyser;    NiFe oxide electrocatalyst;    CRM-free;   

DOI  :  10.3390/en13071720

来源: DOAJ

【 摘 要 】

NiFe electrodes are developed for the oxygen evolution reaction (OER) in an alkaline electrolyser based on an anion exchange membrane (AEM) separator and fed with diluted KOH solution as supporting electrolyte. This study reports on the electrochemical behaviour of two different NiFe-oxide compositions (i.e., Ni₁Fe₁-oxide and Ni₁Fe₂-oxide) prepared by the oxalate method. These catalysts are assessed for single-cell operation in an MEA including a Sustainion™ anion-exchange membrane. The electrochemical polarization shows a current density of 650 mA cm⁻² at 2 V and 50 °C for the Ni₁Fe₁ anode composition. A durability test of 500 h is carried out using potential cycling as an accelerated stress-test. This shows a decrease in current density of 150 mA cm⁻² mainly during the first 400 h. The performance achieved for the anion-exchange membrane electrolyser single-cell based on the NiFeO_x catalyst appears promising. However, further improvements are required to enhance the stability under these operating conditions.

【 授权许可】

Unknown