Fe‐Co Alloyed Nanoparticles Catalyzing Efficient Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol in Water

Abstract

Selective hydrogenation of C=O against the conjugated C=C in cinnamaldehyde (CAL) is indispensable to produce cinnamyl alcohol (COL). Nonetheless, it is challenged by the low selectivity and the need to use organic solvents. Herein, for the first time, we report the use of Fe‐Co alloy nanoparticles (NPs) on N‐doped carbon support as a selective hydrogenation catalyst to efficiently convert CAL to COL. The resultant catalyst with the optimized Fe/Co ratio of 0.5 can achieve an exceptional COL selectivity of 91.7 % at a CAL conversion of 95.1 % in pure water medium under mild reaction conditions, ranking it the best performed catalyst reported to date. The experimental results confirm that the COL selectivity and CAL conversion efficiency are, respectively promoted by the presence of Fe and Co, while the synergism of the alloyed Fe‐Co is the key to concurrently achieve high COL selectivity and CAL conversion efficiency.

Ru-Co-Mn trimetallic alloy nanocatalyst driving bifunctional redox electrocatalysis

“…The ZIF-67 particles were synthesized following the procedure reported in a previous study [31] with some modifications. The process was as follows: Co(NO 3 ) 2 •6H 2 O (1.726 g, 6 mmol) and 2methylimidazole (2-MeIm, 1.970 g, 24 mmol) were, respectively, dissolved in 30 mL of methanol to form clear solutions; the prepared 2-MeIm solution was quickly poured into a Co 2+containing solution and stirred for 10 s; the mixed solution was maintained at room temperature for 20 h; the resulting ZIF-67 precipitates were collected by centrifugation, washed with ethanol for several times, and dried at 60°C in the vacuum oven for 24 h.…”

Semiconductor‐based nanocomposites for selective organic synthesis

“…With the continuous improvement of synthesis methods of N‐doped carbon‐based materials, well‐defined non‐precious metal/metal oxide/metal carbide/alloy nanoparticle embedded into N‐doped carbon support has an explosive leap. [ 40–42 ] These core‐shell structured nanohybrids, that feature good stability and controllable electronic property, contributes to enormous chemicals manufacturing even catalyzed by homogeneous noble metal complex such as esters, quinolines, 2‐methoxy‐4‐methylphenol, anilines, 2,5‐dimethylfuran et al.…”

“…Recently, alloyed Fe‐Co nanoparticles used for selective cinnamaldehyde hydrogenation towards thermodynamically unflavored cinnamyl alcohol in water was reported by Lv and co‐workers. [ 42 ] Through successive pyrolysis‐adsorption‐pyrolysis strategy using MFOs, as‐obtained Fe‐Co alloy nanohybrids with controllable Fe/Co ratio not only regulate selectivity for cinnamyl alcohol up to 91.7 % but also remain high conversion of cinnamaldehyde ultimately rendering optimized product yield. Both experimental and calculated results confirms that beneficial absorption of C = O bond on Fe‐Co alloy surface is a key factor to ensure overall catalytic hydrogenation accomplishment by efficient and selective process.…”

hcp-phased Ni nanoparticles with generic catalytic hydrogenation activities toward different functional groups

“…Catalytic hydrogenation (CH) of nitro-, aldehyde-, ketone-and alkene-functional groups and N-containing heterocyclic compounds is a vital industrial means to produce high value-added fuels and fine chemicals, however, requiring cheap and highly efficient CH catalysts [1][2][3][4][5][6][7][8][9][10][11][12][13]. Enormous efforts have been devoted to exploring different activation approaches capable of boosting the CH activity of cheap and plentiful transition-metal (TM) catalysts, including alloying/de-alloying [14][15][16], defect and strain engineering [17,18], structure and composition manipulations [19,20]. A promising strategy that has recently received increasing attention is engineering TM nanoparticles (NPs) with hexagonal close-packed (hcp) crystal phase to enhance the intrinsic CH performance [21][22][23][24].…”