Klara Arhar, PhD student at Faculty of Mechanical Engineering, University of Ljubljana. My research and academic interests focus on understanding bubble behaviour during water electrolysis, particularly in relation to hydrogen bubble nucleation, growth, detachment, and coalescence at electrode surfaces. I am especially interested in how surface morphology, electrolyte composition, and applied potential influence these processes, with the goal of improving the overall efficiency of electrolysis systems. One key area of my research involves the development and analysis of laser-textured electrode surfaces, where structured surfaces enhance the electrochemically active area, improve wettability, and promote more efficient bubble detachment. These surface modifications not only influence bubble nucleation and size distribution, but also significantly affect the dynamics of bubble plumes, flow entrainment, and diffusion-controlled bubble growth after detachment. By optimizing surface texture, it is possible to enhance electrolysis performance, achieving higher current densities and improved gas production rates at the same applied voltages.