Iwuoha, Emmanuel IheanyichukwuOgirima, Ibrahim YakubuGeremu, Tadele2026-07-152026-07-152026Ogirima, I.Y., Geremu, T.A., Offiah, S.U., Ezema, F.I., Ugwuoke, P.E., Iwuoha, E.I. and Nwanya, A.C., 2026. The potential of hydrothermally synthesized MoO3 and Cr doped MoO3 nanoparticles for electrochemical energy storage applications. Next Materials, 12, p.102518.https://doi.org/10.1016/j.nxmate.2026.102518https://hdl.handle.net/10566/24978Molybdenum trioxide (MoO3) based electrode materials have generated interest for electrochemical energy storage application due to their exceptional optical and chemical properties. However, MoO3 suffers from some drawbacks such as weak electrical conductivity and instability which have necessitated new and innovative approaches to overcome these challenges. In this work, we doped MoO3 with chromium (Cr) with the aim of enhancing its conductivity and further studied the effect of hydrothermal treatment time on its physicochemical and electrochemical properties. The x-ray diffraction results indicate that the materials exhibited an orthorhombic crystal structure. The electrochemical results show that the Cr doped MoO3 obtained after 12 h of hydrothermal treatment (Cr@MoO3-12h) gave the highest specific capacitance of 465 Fg−1, much higher than the other chromium doped MoO3 and the undoped MoO3 nanoparticles at all the hydrothermal treatment times considered. The Cr@MoO3-12h electrode also showed the highest stability retaining almost 89% of its initial specific capacitance over charge-discharge cycles 5000 cycles at 1 A g−1. This suggests that chromium doping and maximizing the hydrothermal treatment duration improved the electrochemical performance of the molybdenum trioxide nanoparticles.enChromium doped MoO3Electrochemical Impedance SpectroscopyEnergy storageHydrothermalSpecific capacitanceArticle