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Catalyst (porous aluminosilicates, aluminophosphates (AlPO) and silicoaluminophosphates (SAPO)) characterization – solid-state NMR – ²⁷Al, ³¹P, ²⁹Si of molecular sieves and heterogeneous catalysts

Understanding the structure-property relationship of solid catalysts is of utmost relevance for efficient chemical processes and technological applications in industries. Solid-state NMR spectroscopy can be used to study the framework atoms of a catalyst such as ²⁷Al, ²⁹Si and ³¹P to give direct information about the structure, coordination and neighbour environments. Use of probe molecules (acidic or basic) with different chemical nature can be employed to monitor the surface of catalysts (i.e. polarity, catalytic active sites, pore size, acidity – Brönsted or Lewis etc.).