Hydrogen is increasingly recognized as a pivotal energy carrier in the global transition to- ward net-zero emissions, particularly in hard-to-decarbonize sectors such as industry and transportation. This thesis presents a comprehensive analysis of low-carbon hydrogen production pathways, focusing on electrolysis and thermochemical cycles. Special em- phasis is placed on the Copper-Chlorine (Cu-Cl) thermochemical cycle and electrolyzer technologies, examining their integration with renewable and nuclear energy systems. The electrolysis pathway is assessed by evaluating alkaline, PEM, and solid oxide elec- trolyzers in terms of energy efficiency, technological maturity, and compatibility with intermittent renewable sources. A dedicated analysis investigates the global hydrogen pro- duction potential from surplus solar, wind, and nuclear energy over the period 2023–2050.