Insights into the Catalytic Activity of Nitridated Fibrous Silica (KCC‐1) Nanocatalysts from ¹⁵N and ²⁹Si NMR Spectroscopy Enhanced by Dynamic Nuclear Polarization

Abstract

Fibrous nanosilica (KCC-1) oxynitrides are promising solid-base catalysts. Paradoxically, when their nitrogen content increases, their catalytic activity decreases. This counterintuitive observation is explained here for the first time using (15) N-solid-state NMR spectroscopy enhanced by dynamic nuclear polarization.