Fe/hollow nano-MgF: a green and highly-efficient alternative to classical Cr-based catalysts for the gas-phase fluorination reaction

A hollow nano-MgF 2 supported Fe (Fe/hollow nano-MgF 2 ) nanocatalyst is prepared which is capable of exhibiting excellent stability under extremely harsh conditions, and has tailored acidity with weak and medium strengths. In the gas-phase fluorination of 1,1,1,3-tetrachloropropane with HF to 3,3,3-trifluoropropene, Fe/hollow nano-MgF 2 exhibits a similar activity to but a much longer lifespan than classical chromia catalysts under the same reaction conditions due to its tailored medium-strength acid sites and stable nanostructure. A green Cr-free catalyst, Fe/hollow nano-MgF 2 , was developed for the formation of HFOs via gas-phase fluorination with HF.