Ultrathin 2D Fe-Nanosheets Stabilized by 2D Mesoporous Silica: Synthesis and Application in Ammonia Synthesis.

ABSTRACT: Developing high-performance Fe-based ammonia catalysts through simple and cost-efficient methods has received an increased level of attention. Herein, we report for the first time, the synthesis of two-dimensional (2D) FeOOH nanoflakes encapsulated by mesoporous SiO₂ (mSiO₂) via a simple solution-based method for ammonia synthesis. Due to the sticking of the mSiO₂ coating layers and the limited spaces in between, the Fe after reduction retains the 2D morphology, showing high resistance against the sintering in the harsh Haber-Bosch process. Compared to supported Fe particles dispersed on mSiO₂ spheres, the coated catalyst shows a significantly improved catalytic activity by 50% at 425 °C. Thermal desorption spectroscopy (TDS) reveals the existenc

SUBMITTER: Fan H 

PROVIDER: S-EPMC8397249 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature