Sonochemical synthesis of CeVO_4 nanoparticles for electrochemical hydrogen storage

摘要

In this study, the synthesis of cerium vanadate (CeVO4) nanoparticles using ammonium metavanadate, cerium (III) nitrate hexahydrate as the primary reactant and hydrazine as the source of OH- was presented in the absence and presence of ultrasonic waves. Reaction control was performed using OH- and ethylenediamine sources. Other parameters such as solvent, surfactant, power, and time were also examined. Nanostructures were analyzed by XRD, FESEM, FTIR, DLS, BET, and EDS. FESEM results showed that using ultrasonic irradiation, relatively fine spherical nanoparticles were formed in one step while uniform spherical nanostructures were formed in a two-step path. The obtained product was used for electrochemical storage of hydrogen. The discharge capacity of spherical nanoparticles of CeVO4 with high uniformity was recorded at about 4299 mAh/g. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.