Improved Methanol‐to‐Olefin Catalyst with Nanocages Functionalized through Ship‐in‐a‐Bottle Synthesis from PH₃

Active phosphate flotsam: Tetramethylphosphonium cations can be prepared in the cages of HSAPO-34 catalysts from PH3 and methanol by using a ship-in-a-bottle approach (see picture). Calcination of this material leaves phosphate debris in some of the cages, which produces an active methanol-to-olefin catalyst with improved ethylene selectivity.