Stephan Lany of NREL has introduced a new methodology, Chemical Potential Analysis, in the quest for efficient solar thermochemical hydrogen production. This innovative approach aims to address the shortcomings of the traditional van't Hoff method by providing a more detailed analysis of materials' behavior, crucial for improving green hydrogen generation. Lany's study focuses on the significance of understanding defect mechanisms and their impact on material behavior, highlighting the importance of temperature dependence of enthalpy and entropy. By testing the new analysis method on computational models including ceria, Lany revealed unique behavior in the production of concentrated H2/H2O mixtures, emphasizing the need for a balance between reduction and oxidation properties. Lany's goal is to create a common language that bridges experimental observations with theoretical models, aiding researchers in designing new materials for solar fuel generation. The proposed method not only enhances understanding but also provides insights into improving ceria or discovering new oxides to optimize hydrogen production efficiency, a crucial step towards sustainable energy solutions.