Monodisperse gold–palladium alloy nanoparticles and their composition-controlled catalysis in formic acid dehydrogenation under mild conditions

Abstract

Monodisperse 4 nm AuPd alloy nanoparticles with controlled composition were synthesized by co-reduction of hydrogen tetrachloroaurate(III) hydrate and palladium(II) acetylacetonate with a borane-morpholine complex in oleylamine. These NPs showed high activity (TOF = 230 h(-1)) and stability in catalyzing formic acid dehydrogenation and hydrogen production in water at 50 °C without any additives.

Alkyne‐Protected AuPd Alloy Nanoparticles for Electrocatalytic Reduction of Oxygen

“…The enhancement in electrocatalytic activity of alloys, as compared to pure metal constituents, has also been recognized for many non‐platinum metals including gold and palladium . For instance, palladium is a platinum‐group metal that binds to oxygen even more strongly than platinum, whereas gold has very little interaction with oxygen, making these two metals optimal candidates for a binary alloy .…”

Effect of annealing in oxygen on alloy structures of Pd–Au bimetallic model catalysts

“…1,2 As one of the most studied bimetallic systems, Pd−Au catalysts have displayed promising performance for a broad range of catalytic reactions such as CO oxidation, [3][4][5] acetoxylation of ethylene to vinyl acetate, 6,7 selective oxidation of alcohols, [8][9][10][11] selective hydrogenation of unsaturated hydrocarbons, [12][13][14][15] hydrodechlorination of chlorinated compounds, [16][17][18] hydrodesulfurization of sulfur-containing molecules, 19,20 decomposition of liquid hydrocarbons for H 2 production, 21,22 and the direct synthesis of H 2 O 2 from H 2 and O 2 . 1,2 As one of the most studied bimetallic systems, Pd−Au catalysts have displayed promising performance for a broad range of catalytic reactions such as CO oxidation, [3][4][5] acetoxylation of ethylene to vinyl acetate, 6,7 selective oxidation of alcohols, [8][9][10][11] selective hydrogenation of unsaturated hydrocarbons, [12][13][14][15] hydrodechlorination of chlorinated compounds, [16][17][18] hydrodesulfurization of sulfur-containing molecules, 19,20 decomposition of liquid hydrocarbons for H 2 production, 21,22 and the direct synthesis of H 2 O 2 from H 2 and O 2 .…”

Monodisperse AgPd Alloy Nanoparticles and Their Superior Catalysis for the Dehydrogenation of Formic Acid

“…These catalysts are generally more stable but much less active than the homogeneous ones. [9] Encouraged by this result, we further improved our solution phase synthesis and produced monodisperse 2.2 nm AgPd NPs with the desired composition controls. [4] For example, AgPd NPs supported on cerium oxide or AuPd NPs immobilized in a metal-organic framework showed an enhanced FA dehydrogenation catalysis with the initial turnover frequency (TOF) reaching 210 h À1 or 192 h À1 at 90 8C, respectively.…”

“…[9] Encouraged by this result, we further improved our solution phase synthesis and produced monodisperse 2.2 nm AgPd NPs with the desired composition controls. Our very recent report showed that monodisperse 4 nm AuPd NPs were more active in catalyzing the dehydrogenation of FA in water at 50 8C without using any additive and their initial TOF reached 230 h À1 .…”