Effect of SiO2–Al2O3 Composition on the Catalytic Performance of the Re2O7/SiO2–Al2O3 Catalysts in the Metathesis of Ethylene and 2-Pentene for Propylene Production

Atomic Layer Deposition of Rhenium–Aluminum Oxide Thin Films and ReOx Incorporation in a Metal–Organic Framework

“…18,20−24 More recently, ALD found applications in mesoporous materials functionalization 25−30 and has also emerged as a unique tool in catalysts synthesis and design. 31,32 Generally, rhenium-based heterogeneous catalysts have been broadly investigated, and the known systems largely consist of rhenium oxide species, metallic rhenium nanoparticles, and also singleatom species deposited on a variety of oxide supports, which include, for instance, carbons, 33,34 silicas, 35 aluminas, 36,37 and zeolites. 33,34 Especially due to their catalytic relevance, oxo-rhenium species confined within zeolite frameworks 38,39 have been investigated and particular emphasis was placed on size control over the units incorporated within the zeolites cages and on the understanding of their molecular nature.…”

“…In particular, rhenium oxide nanoparticles or rhenium oxide clusters deposited over high surface area supports have become important because of their relevance in industrial applications. 40 Principally known for their activity in alkene metathesis, 36,42−44 rhenium oxide-based catalysts also demonstrated their potential in other catalytic transformations of practical relevance, such as alcohols dehydration, 35,37 methanol oxidation, 41,42 and hydrogenation reactions. 33,34 Given the lack of ALD processes involving rhenium, herein we investigate the self-limiting, vapor-phase deposition of rhenium oxide assisted by trimethylaluminum (TMA) to yield rhenium−aluminum oxide thin films.…”

“…More recently, ALD found applications in mesoporous materials functionalization − and has also emerged as a unique tool in catalysts synthesis and design. , Generally, rhenium-based heterogeneous catalysts have been broadly investigated, and the known systems largely consist of rhenium oxide species, metallic rhenium nanoparticles, and also single-atom species deposited on a variety of oxide supports, which include, for instance, carbons, , silicas, aluminas, , and zeolites. , …”

“…Principally known for their activity in alkene metathesis, ,− rhenium oxide-based catalysts also demonstrated their potential in other catalytic transformations of practical relevance, such as alcohols dehydration, , methanol oxidation, , and hydrogenation reactions. , …”