Fig. 1: Schematic representation of the bimetallic MOF PCN-250(Fe2Co) as a porous catalyst for both O3 and VOCs removal.
From: Catalytic ozone decomposition and adsorptive VOCs removal in bimetallic metal-organic frameworks

The O, C, N atoms, MO6 units (M = Fe or Co) and cages in PCN-250(Fe2Co) are represented by red, black, blue spheres, turquoise polyhedra, and large yellow spheres, respectively.