Dr. Harol Moreno, in collaboration with Siavash Karbasizadeh from the SmartState Center for Experimental Nanoscale Physics at the University of South Carolina, Dr. Mohammad Amirabbasi from the Institute of Materials Science, Materials Modelling at the Technical University of Darmstadt and Dr. Esmaeil Adabifiroozjaei from the Advanced Electron Microscopy Division at the Technical University of Darmstadt presented a phase-resolved analysis of NiO-derived materials relevant to the oxygen evolution reaction, combining ground-state DFT + U calculations with operando and in situ Raman spectroscopy. They demonstrated that the computed vibrational and electronic properties serve as reference points, enabling meaningful correlation with the Raman response of structurally complex, electrochemically conditioned catalysts. By systematically dissecting the signatures of NiO, Ni(OH)2, and NiOOH across distinct crystallographic configurations, they have developed a consistent framework that correlates different NiO phases relevant to the OER, clarifying their metastability.