Encapsulation of transition metals in lead-based MOF pores to facilitate efficient thermal decomposition of ammonium perchlorate

Abstract

The high thermal decomposition temperature and non-concentrated exothermicity of ammonium perchlorate (AP) have constrained the advancement of solid propellants. Constructing catalysts with uniformly dispersed catalytic sites is an effective strategy to achieve efficient thermal decomposition of AP. In light of this, we innovatively proposed encapsulating transition metals M(II) (M = Co/Ni/Zn/Mn) into the pores of Pb-BTC, thereby constructing a series of novel bimetallic MOF catalysts (Pb–M-BTC) for the efficient catalytic thermal decomposition of AP. The research results indicate that the uniform dispersion of Pb–M-BTC metal active centers at the molecular level, combined with the unique electronic structure and synergistic effects between the bimetals, ensures high consistency and efficiency in the catalytic thermal decomposition process of AP. The introduction of transition metals further reduces the high-temperature decomposition temperature of AP.