We report selective electrocatalytic reduction of carbon dioxide to monoxide on gold nanoparticles (NPs) in 0.5 M KHCO3 at 25 °C. Among monodisperse 4, 6, 8, and 10 nm NPs tested, the 8 Au show maximum Faradaic efficiency (FE) (up 90% -0.67 V vs reversible hydrogen electrode, RHE). Density functional theory calculations suggest that more edge sites (active for CO evolution) than corner competitive H2 evolution reaction) NP surface facilitates stabilization intermediates, such as COOH*,...

Monodisperse nickel nanoparticles are prepared from the reduction of Ni(acac)2 with borane tributylamine in presence oleylamine and oleic acid. Without any special treatment to remove surfactants, as-synthesized Ni supported on Ketjen carbon support exhibit high catalytic activity hydrogen generation hydrolysis ammonia−borane (H3NBH3) complex a total turnover frequency value 8.8 mol H2·(mol Ni)−1·min−1. Such catalysis based represents promising step toward practical development H3NBH3 as...

A facile approach to the composition-controlled synthesis of monodisperse 2.2 nm AgPd alloy nanoparticles (NPs) is reported. The NPs are highly active and durable catalysts for dehydrogenation formic acid. study proves unique in using alloying effects enhance catalytic activity hydrogen generation from acid (see picture). Formic (FA, HCOOH) a common small organic with melting point 8.4 °C boiling 100.8 °C. It can undergo reaction, HCOOH→H2+CO2, releasing H2 that will be important...

Monodisperse 8 nm CoPd nanoparticles (NPs) with controlled compositions were synthesized by the reduction of cobalt acetylacetonate and palladium bromide in presence oleylamine trioctylphosphine. These NPs active catalysts for hydrogen generation from hydrolysis ammonia borane (AB), their activities composition dependent. Among tested AB, Co(35)Pd(65) exhibited highest catalytic activity durability. Their completion time activation energy 5.5 min 27.5 kJ mol(-1), respectively, which...

Monodisperse CoPd nanoparticles (NPs) were synthesized and studied for catalytic formic acid (HCOOH) oxidation (FAO). The NPs prepared by coreduction of Co(acac)(2) (acac = acetylacetonate) PdBr(2) at 260 °C in oleylamine trioctylphosphine, their sizes (5-12 nm) compositions (Co(10)Pd(90) to Co(60)Pd(40)) controlled heating ramp rate, metal salt concentration, or molar ratios. 8 nm activated HCOOH a simple ethanol wash. In 0.1 M HClO(4) 2 solution, activities followed the trend Co(50)Pd(50)...

We report a facile synthesis of monodisperse NiPd alloy nanoparticles (NPs) and their assembly on graphene (G) to catalyze the tandem dehydrogenation ammonia borane (AB) hydrogenation R-NO2 and/or R-CN R-NH2 in aqueous methanol solutions at room temperature. The 3.4 nm NPs were prepared by coreduction nickel(II) acetate palladium(II) acetlyacetonate borane-tert-butylamine oleylamine deposition G via solution phase self-assembly process. G-NiPd showed composition-dependent catalysis reaction...

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

Black phosphorus (BP) as a layered two-dimensional (2D) semiconductor material with tunable band gap has attracted growing attention for promising applications in diverse fields including biotechnology owing to its excellent physical and chemical properties. In this study, BP crystals were synthesized using vapor transport method exfoliated into nanosheets deoxygenated water or hexane. Next, monodisperse Au nanoparticles that surfactant-assisted reduction assembled on hexane yield BP/Au...

Charge transfer between metal sites and supports is crucial for catalysis. Redox-inert are usually unfavorable due to their less electronic interaction with sites, which, we demonstrate, not always correct. Herein, three metal-organic frameworks (MOFs) chosen mimic inert or active Pt nanoparticles (NPs) the photocatalysis studied. Results demonstrate formation of a Schottky junction MOFs, leading electron-donation effect MOFs. Under light irradiation, both MOF interband excitation dominate...

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Polymer-stabilized cobalt(0) nanoclusters were prepared from the reduction of cobalt(II) chloride in presence poly(N-vinyl-2-pyrrolidone) (PVP) stabilizer methanol solution. PVP-stabilized found to be stable solution and could isolated as solid material characterized by TEM, XPS, FT-IR, UV−visible electronic absorption spectroscopy. employed catalyst hydrolysis sodium borohydride ammonia-borane, which have been considered solid-state hydrogen storage materials for portable fuel cell...

Monodisperse Ni nanoparticles (NPs) have been synthesized by the reduction of nickel(II) acetylacetonate with borane-tributylamine complex in a mixture oleylamine and oleic acid. These NPs are an active catalyst for hydrolysis ammonia-borane (AB, H3N·BH3) under ambient conditions their activities dependent on chemical nature oxide support that they were deposited on. Among various oxides (SiO2, Al2O3, CeO2) tested, SiO2 was found to enhance NP catalytic activity due etching 3.2 nm giving...

Monodisperse CuPd alloy nanoparticles (NPs) were prepared by using a typical high-temperature organic solution phase protocol comprising the coreduction of copper(II) acetylacetonate and palladium(II) morpholine–borane complex in oleylamine 1-octadecene at 80 °C. The presented synthesis allows us to control composition NPs simply tuning initial ratio metal precursors Cu-rich Cu75Pd25 Pd-rich Cu32Pd68 synthesized besides Cu48Pd52 NPs. Transmission electron microscopy studies revealed that...

Monodisperse 7 nm CoPd nanoparticles (NPs) with controlled compositions were synthesized and studied for their catalyzing methanolysis of ammonia borane (AB). The NPs prepared by the reduction cobalt(II) acetylacetonate palladium(II) bromide in presence oleylamine trioctylphosphine. Deposited on a carbon support without any specific surface treatment, these active catalysts AB, activities composition-dependent. Among all tested, Co48Pd52 exhibited highest catalytic activity stability....

MPd (M: Co, Cu) nanoparticles were synthesized by borane–amine reduction of metal acetylacetonates and showed high catalytic performance in formic acid oxidation.