Chemoselective Hydrogenation of Cinnamaldehyde on Iron‐Oxide Modified Pt/MoO_3−y Catalysts

Abstract

Hydrogenation of α,β‐unsaturated aldehydes to unsaturated alcohols suffers a huge challenge in chemoselectivity. Herein, surface decoration by FeOx is introduced to remarkably improve the selectivity of cinnamyl alcohol (COL) in cinnamaldehyde (CAL) hydrogenation on Pt/MoO3−y. The enhanced acidity on Pt–FeOx interfaces is beneficial for the chemisorption and activation of C=O bonds, promoting selective hydrogenation. The optimal catalysts with defined FeOx decoration afford efficient and chemoselective CAL hydrogenation (91.3 % selectivity) under mild conditions (PH2=1 MPa, T=30 °C). Moreover, such innovation is further extended to develop other efficient metal (Ir, Rh and Pd) catalysts, identifying a universal promotion to Pt‐group metals. This work is anticipated to inspire the rational design of high‐performance catalysts via effective surface/interface engineering.

Synergism of Pt nanoparticles and iron oxide support for chemoselective hydrogenation of nitroarenes under mild conditions

“…However, large scale application of Pt-based catalysts is still limited by their high cost [8][9][10][11]. Moreover, active Pt sites cannot discriminate the differences of functional groups, causing a low catalytic selectivity [12][13][14]. Take the hydrogenation of nitroarenes as an example, nitro groups and other reducible groups (e.g., C=C, C=O, -X, etc.)…”

Review on heterogeneous catalysts for the synthesis of perfumery chemicals via isomerization, acetalization and hydrogenation

“…Metal nanoparticles were deposited on metal oxide via selective adsorption, impregnation or deposition-precipitation methods. 111,148,149 Apart from that, colloidal synthesis with the use of ligand stabilizers, and many other post-synthesis methods have been investigated to produce metal nanoparticles with uniform shape, size and morphology. [150][151][152] Metal nanoparticles have been widely…”

“…Noble metal Ag, 139 Pd, 123 Ru, 140,141 and Pt 142,143 and transition metal Co 144 and Ni 145‐147 were used to promote catalytic activity for the synthesis of perfumery chemicals via chemoselective hydrogenation reaction (Table 4). Metal nanoparticles were deposited on metal oxide via selective adsorption, impregnation or deposition–precipitation methods 111,148,149 . Apart from that, colloidal synthesis with the use of ligand stabilizers, and many other post‐synthesis methods have been investigated to produce metal nanoparticles with uniform shape, size and morphology 150‐152 .…”

Ruling Factors in Cinnamaldehyde Hydrogenation: Activity and Selectivity of Pt-Mo Catalysts

“…Wang et al [21] studied the effect of Cu on Pt, proving that Pt-Cu/SiO 2 was more selective toward COL than monometallic Pt/SiO 2 , due to the increase in the amount of the Pt 0 on the surface, which is derived from the interaction between Pt and Cu. To the best of our knowledge, there are only two recent papers reporting Pt modified by Mo in cinnamaldehyde hydrogenation [22,23]. In the first by Wang et al [22], SBA-15 was modified with Mo 2 N nanoparticles and then used for Pt deposition.…”

“…A synergistic effect between Pt and Mo 2 N was observed, and both activity and selectivity to COL were improved. In the second one [23], Pt was supported on MoO 3 and decorated by FeO X . The specific acidity of Pt-FeO X interfaces was shown to be advantageous for the chemisorption and activation of C=O bond, promoting the selective hydrogenation of CAL to COL.…”