A less cost-intensive alternative to PEM is anion exchange membrane (AEM) electrolysis, which is an emerging water-splitting technology that combines the advantages of both alkaline and PEM systems. It uses an anion-conducting polymer membrane and operates in alkaline conditions, allowing the use of non-precious metal catalysts such as nickel instead of expensive PGMs. This reduces costs while maintaining high efficiency and system simplicity. Unlike traditional alkaline systems, AEM electrolysers offer compact designs and fast, dynamic responses, making them attractive for integration with renewable energy sources. Current challenges include the development of durable membranes and stable catalysts that can withstand long-term operation under alkaline conditions.

The current research focuses on the development of advanced nickel-based catalysts for AEM electrolysis. The goal is to improve both activity and long-term stability under alkaline conditions. To achieve this, Ni-based alloy and other PGM-free catalysts are designed to enhance performance and resistance to degradation. Catalyst evaluation is carried out in the three-electrode cell setup featuring a reference electrode, allowing detailed electrochemical analysis by using synergies with the setup in PEM electrolysis.

In the next phase, the optimized catalyst layer and cell configuration will be integrated into a complete AEM electrolyser for cell-level testing. Initially, the system will operate with deionized water to establish baseline performance. Later experiments will explore the use of wastewater streams containing ammonia as an alternative feedstock, aiming to assess their impact on efficiency and material stability. This approach supports the development of more sustainable and cost-effective hydrogen production technologies.