Propanol formation from CO2 and C2H4 with H2 over Au/TiO2: Effect of support and K doping

Alcohol Synthesis from CO2, H2, and Olefins over Alkali‐Promoted Au Catalysts—A Catalytic and In situ FTIR Spectroscopic Study

“…Thus, after comprehensive testing of several metals and supports, gold nanoparticles (Au NPs) supported on TiO 2 (anatase, rutile) or SiO 2 and doped with alkali metals (K, Cs) have been proven to catalyze all these reactions at temperatures between 200-250 8Ca nd pressure of 20 bar. [21] As these studies [17][18][19][20][21] focused on particular aspects for as elected catalysts ystem, ac omprehensive study is neededt o elucidatet he specific functiono ft he different alkali dopants and the different support materials in the alcohol synthesis reaction from CO 2 ,H 2 ,a nd C 2 H 4 .F urthermore, it is not clear if this approach has general relevance thati s, if it is also applicable for the synthesis of butanol from CO 2 ,H 2 ,and C 3 H 6 . This is caused by an enhanced ability of the TiO 2 -based catalysts for CO 2 activation, as concluded from in situ fourier-transform infrared (FTIR) spectroscopy and temporal analysiso fp roducts (TAP) studies.…”

“…[19] Comparing the performance of K-promoted catalysts, the SiO 2 -based catalysts showed higherC O 2 conversionst han their TiO 2 -based counterparts, whereas the undesired hydrogenationo fe thene was found to decrease with increasingKloading. [21] As these studies [17][18][19][20][21] focused on particular aspects for as elected catalysts ystem, ac omprehensive study is neededt o elucidatet he specific functiono ft he different alkali dopants and the different support materials in the alcohol synthesis reaction from CO 2 ,H 2 ,a nd C 2 H 4 .F urthermore, it is not clear if this approach has general relevance thati s, if it is also applicable for the synthesis of butanol from CO 2 ,H 2 ,and C 3 H 6 .…”

“…[9][10][11][12][13] Higher alcohols are synthesized by catalytic homologation of methanol or directly from CO 2 and alkenes in homogeneously catalyzed reactions. [17][18][19][20][21][22] Finding multifunctional catalysts for this reaction is challenging because the RWGS reaction runs above 300 8Co wing to thermodynamic constraints, but hydroformylationr equires lower temperatures. [17][18][19][20][21][22] Finding multifunctional catalysts for this reaction is challenging because the RWGS reaction runs above 300 8Co wing to thermodynamic constraints, but hydroformylationr equires lower temperatures.…”

“…[4,[14][15][16] Recently,w ei ntroduced an ew approachf or the direct synthesis of 1-propanol from CO 2 ,H 2 ,a nd C 2 H 4 by combining RWGS and C 2 H 4 hydroformylation to form propanal followed by its hydrogenation to 1-propanol, as demonstrated in Scheme 1. [17][18][19][20][21][22] Finding multifunctional catalysts for this reaction is challenging because the RWGS reaction runs above 300 8Co wing to thermodynamic constraints, but hydroformylationr equires lower temperatures. Thus, after comprehensive testing of several metals and supports, gold nanoparticles (Au NPs) supported on TiO 2 (anatase, rutile) or SiO 2 and doped with alkali metals (K, Cs) have been proven to catalyze all these reactions at temperatures between 200-250 8Ca nd pressure of 20 bar.…”

Reusable Catalysts for Hydroformylation‐Based Reactions

“…Meijboom [141] 5 % Au/CsÀ Co 3 O 4 Oct-1-ene (T = 140°C, P = 40 bar (CO/H 2 1 : 2), 16 h) 5 Kondratenko [142][143][144][145] drofuran as solvent resulted in the best catalytic activity when compared with the other solvents (toluene, heptane, hexane, ethanol). The authors proposed that THF a crucial role in the stabilization of the active species on the catalyst surface.…”