Nanoelectrocatalytic dynamics of lithium zirconium oxide perovskites containing sequentially incorporated palladium oxide, samarium and terbium.
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Date
2024
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Univeristy of the Western Cape
Abstract
The usage of fossil fuels as energy source has an undesirable impact on the environment and they cannot be recycled. It is projected that at some point, they will run out. With the rapid rise in energy demand and ever-escalating environmental risks, the need for transition from fossil fuel to renewable energy sources is of utmost importance. Thus, a need for a renewable, clean and abundant source of energy is urgent. Hydrogen, as a high-grade clean and renewable energy carrier, is gradually considered as one of the most promising candidates for the fuel of the future. The thesis presents the platinum-metal free electrochemical hydrogen evolution reaction (HER) electrocatalyst based on perovskite oxide, lithium zirconium oxide (Li2ZrO3) doped with palladium, samarium and terbium. This work is motivated by the ongoing research for a pursuit of different materials to replace the scarce and high costly platinum based electrocatalyst. Li2ZrO3 which is identified as a good candidate as it possesses outstanding absorption property, is lightweight with ease of preparation and high catalytic activity. However, the usage of this material as an electrocatalyst is limited by poor electrical conductivity and less electrochemical stability. In order to improve these properties, incorporation of precious and lanthanides metal is needed. In this study, we focus on developing a novel all inorganic perovskites oxide that is Pt-free for HER application.
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Keywords
Perovskite oxide, Lithium zirconium oxide, Palladium, Samarium, Terbium