|About this Abstract
||MS&T22: Materials Science & Technology
||Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
||Thermo-Chemical Reduction Controlled Exsolution of Metal Nanoparticles (NPs) From Perovskite Lattice: Synthesis to Application
||Aman Bhardwaj, Shital Kale, Benedict Witulski, Anna Schmidt Verma, Sanjay Mathur
|On-Site Speaker (Planned)
Transition-metal nanoparticle (NP) catalysts supported on solid materials represent potentially competitive candidates for heterogeneous catalysis. However, the high surface free energy and high redox ability possess a huge threat to their microstructural and chemical stability. Therefore, methodologically and conceptually novel immobilization methods are critically required. In this work, we employ the exsolution approach for the development of metal NPs decorated metal oxide catalysts. Ni metal and Fe-Ni alloy NPs were exsolved from Ce, Ni co-doped LaTiO3 and Sr, Ni co-doped LaFeO3 perovskite oxide backbones by a controlled thermochemical reduction treatment. The materials synthesized thus were evaluated as electrocatalyst for hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) and found to deliver superior electrochemical properties over bare metal oxide. This validates the great potential of the exsolution technique for the development of highly active and stable metal/metal oxide heterostructure catalysts.