The article by Harun Tüysüz discusses the potential of alkaline water electrolysis (AWE) as a sustainable method for producing green hydrogen. AWE is highlighted as a promising technology for large-scale hydrogen production, driven by the increasing demand for clean energy. The process involves two half-reactions: the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). The OER is more challenging thermodynamically and kinetically compared to the HER. The article reviews the basic principles of AWE, including the assembly of industrial electrolyzer plants and the role of electrocatalysts in enhancing reaction rates. Key challenges in AWE include the development of durable and abundant electrocatalysts, particularly for the OER. The surface properties of electrocatalysts, such as their interaction with water and reaction intermediates, play a crucial role in catalytic performance. The article also discusses the mechanisms of the HER and OER, including the Adsorbate Evolution Mechanism (AEM) and the Lattice Oxygen Mechanism (LOM) for OER. Tüysüz's research focuses on improving the intrinsic activity and stability of cobalt-based electrocatalysts for the OER. This includes enhancing the binding strengths between the catalyst surface and intermediates, as well as the role of e-orbital occupancy in Heusler compounds. The article highlights the importance of sustainability and recyclability in catalyst design and the need for further research to address the challenges of large-scale production and utilization of green hydrogen.The article by Harun Tüysüz discusses the potential of alkaline water electrolysis (AWE) as a sustainable method for producing green hydrogen. AWE is highlighted as a promising technology for large-scale hydrogen production, driven by the increasing demand for clean energy. The process involves two half-reactions: the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). The OER is more challenging thermodynamically and kinetically compared to the HER. The article reviews the basic principles of AWE, including the assembly of industrial electrolyzer plants and the role of electrocatalysts in enhancing reaction rates. Key challenges in AWE include the development of durable and abundant electrocatalysts, particularly for the OER. The surface properties of electrocatalysts, such as their interaction with water and reaction intermediates, play a crucial role in catalytic performance. The article also discusses the mechanisms of the HER and OER, including the Adsorbate Evolution Mechanism (AEM) and the Lattice Oxygen Mechanism (LOM) for OER. Tüysüz's research focuses on improving the intrinsic activity and stability of cobalt-based electrocatalysts for the OER. This includes enhancing the binding strengths between the catalyst surface and intermediates, as well as the role of e-orbital occupancy in Heusler compounds. The article highlights the importance of sustainability and recyclability in catalyst design and the need for further research to address the challenges of large-scale production and utilization of green hydrogen.