Researchers at the University of Warwick and the University of Birmingham studied what happens as molecular precursors are heated, focusing on transient intermediate phases rather than the final product. They found several previously unknown materials, including a new form of bismuth vanadate, a compound widely studied for using sunlight to produce clean hydrogen.
The newly identified beta-BiVO4 has a different atomic arrangement and a significantly larger band gap, changing how it interacts with light. That difference could give researchers new ways to tune materials for solar fuel production, catalysis, and electronics.
Another hidden phase identified during the experiments could store large amounts of lithium, raising the possibility of use in next-generation batteries. To observe these normally hidden states, the team combined solid-state NMR spectroscopy, X-ray diffraction, and pair distribution function analysis. They also found that the choice of precursor and the way it decomposes strongly influence which materials form.
The findings suggest that intermediate phases are not just stepping stones but can have useful properties in their own right. By controlling temperature, precursor chemistry, and reaction pathways, researchers may be able to deliberately create and stabilize many more hidden materials for practical applications.