Abstract
The rapid increase in energy consumption has severely rehabilitated human life urging to develop reliable and environmental friendly energy storage devices. Target oriented, systematic approach has been adopted to synthesis La doped CeO2 nanostructures with percentage as LaxCe1-xO2 (X = 0,1,3,5,7) for potential super capacitors applications. Morphological doping impact on H-2 production, electrochemical and optical properties are thoroughly investigated. XRD studies revealed the crystalline phase purity and attained approximately 35 nm average crystallite size. The SEM images exposed that primary morphology nanoparticles has been tuned into nanorods by increasing the La concentration in CeO2 with size range 40~60 nm. CV graphs depicted that the prepared electrodes obey the pseudo capacitive faradaic reactions behavior in nature. Maximum capacitance (925 F g(-1)) has been achieved by La0.05Ce0.95O2 which is better than numerous reported materials. The La0.05Ce0.95O2 also exhibited excellent GCD stability with 87.8% retention exhibiting it suitability for supercapacitor applications. Furthermore, the La0.05Ce0.95O2 showed the significantly higher H-2 (9 mu mol h(-1)g(-1)) production rate as compared to undoped CeO2 and La0.01Ce0.99O2, La0.03Ce0.97O2 samples. This higher production is attributed to the recombination rate and have strong substantial correlation with optical characteristics.& nbsp;(c) 2022 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.