Selective hydroformylation of ethene and propene catalysed on nay zeolite-entrapped Rh6 and bimetallic RhFe clusters and their structural characterization by extended x-ray absorption fine structure and fourier transform infrared spectroscopy

Synthesis and Reversible Decarbonylation of Zeolite-Entrapped Bimetallic Carbonyl Clusters, [HCoRu3(CO)13]

“…However, when Rh-Fe and Rh-Ir carbonyl clusters are decarbonylated, metal is leached from them and their structural integrity is lost. 10,11 Similar effects have been observed for intrazeolite M/Pd alloy clusters. [14][15][16][17] Preparation of bimetallic clusters with uniform nuclearities in zeolite has not yet been well demonstrated.…”

Promoting Effect of Mo on Alcohol Formation in Hydroformylation of Propylene and Ethylene on Mo-Rh/SiO2

“…It has been known that rhodium is the most active catalyst for hydroformylation. Although the catalyst development for the gas-phase [1,2] and liquid-phase [3][4][5][6] hydroformylation has been performed, the additive effect of various components on heterogeneous Rh catalysts has been investigated [7][8][9][10][11][12][13][14][15]. It has been reported that the additives such as Fe, Zn promote the formation of alcohols in ethylene hydroformylation [1,8].…”

Current State of the Art of the Solid Rh-Based Catalyzed Hydroformylation of Short-Chain Olefins

“…In the past a number of groups have pursued the strategy of attachment of metal carbonyl complexes on solid support materials via impregnation or reactive deposition; good examples are known from the group of Ichikawa [35][36][37]. Such catalysts have been investigated the gas phase hydroformylation of ethylene and propylene, with catalysts derived from Rh and Co carbonyl complexes supported on metal oxides.…”

“…It was shown that that the n/iso aldehyde ratio could be enhanced depending on the presence of cobalt; a possible explanation is given by the electron donating effect of the cobalt, which stabilizes the linear rhodium alkyl complex critical for the formation of the n-product 4 [35]. In the context of bimetallic catalysts, Rh/Fe carbonyl complexes, such as [NMe] 2 [FeRh 4 (CO) 15 ], [TMBA][FeRh 5 (CO) 16 ] (TMBA = trimethyl benzylammonium), [TMBA] 2 [Fe 2 Rh 4 (CO) 16 ] and Fe 3 Rh 2 (CO) 14 C have been in the center of interest as precursors for supported catalyst materials (NaY-Zeolite [36] and SiO 2 [37] as supports) in the hydroformylation of propylene. It has been shown that catalysts prepared from [TMBA] 2 [Fe 2 Rh 4 (CO) 16 ] precursors impregnated on SiO 2 exhibit a very high specific rate for aldehyde formation (5.04 h −1 ).…”