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    • Keywords


      LaCo0.94Pt0.06O3; In-situ exsolution; Pt nanoparticles; Electrochemical performance.

    • Abstract


      This report designed a Pt/LaCoO3 composite electrocatalyst for electrochemical water splitting: LaCo0.94Pt0.06O3 was prepared via the sol-gel method and then dealt with a heat treatment in 10% H2/Aratmosphere at 350°C. The XRD, HRTEM, SEM and XPS results show that the Pt nanoparticles (NPs)exsolve from the perovskite lattice and are homogeneously distributed on the surface. The HER and OER performance of the samples was tested in 1 mol.L-1 KOH solution and the findings illustrate that comparedwith LaCo0.94Pt0.06O3, Pt/LaCoO3 owes better OER and HER performance. The improved performance couldbe up to the higher ratio of oxygen vacancies and improved charge transfer. Furthermore, the synergistic effect between Pt NPs and the LaCoO3 matrix may also take a leading part in the future.

    • Graphical Abstract


      After the exsolution, the Pt/LaCoO3 is well-developed with smooth surface and some nanoparticles are homogeneously distributed on the surface of the samples. The exsolved Pt nanoparticles can accelerate the electron exchange process between the matrix and its adsorbed intermediates, and ultimately promote the electrochemical reaction kinetics.

    • Author Affiliations



      1. Insitute of New Energy, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
      2. Key Laboratory of Special Functional materials for Ecological Environment and Information, Ministry of Education, People’s Republic of China, Hebei University of Technology, Tianjin 300132, People’s Republic of China
    • Dates

  • Journal of Chemical Sciences | News

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      Posted on July 25, 2019

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