Ultrafast Synthesis of Oxygen Vacancy Rich Pt-Doped La_0.6Sr_0.4CoO₃ with Enhanced Oxygen Evolution Activities

Abstract

Perovskite oxide catalysts have been verified to prominently enhance the efficiency of electrolytic water splitting reactions. The synthesis of a 0.03Pt-La_0.6Sr_0.4CoO₃ material, accomplished via the high-temperature shock (HTS) approach, constitutes a crucial advancement presented herein. The catalytic properties of Pt-doped perovskite materials for the oxygen evolution reaction (OER) were investigated under optimal experimental circumstances. The discoveries disclose that the platinum-doped sample manifests a remarkable reduction in OER catalytic overpotential by 78 mV in contrast to the non-doped counterpart. Advanced characterization techniques, encompassing scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and in situ Raman spectroscopy, were utilized to explore the performance of the catalyst. The outcomes suggest that the enhanced performance is ascribable to the integration of platinum atoms into the perovskite lattice, which gives rise to an expansion of the lattice and a subsequent optimization of the electronic structure. This research offers a novel perspective for the development of electrocatalysts intended for the oxygen evolution reaction, potentially laying the foundation for more efficient and effective energy conversion technologies.

Keywords

Perovskite / Electrochemical performance / High-temperature shock

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Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH