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nickel, etc ; electrodes; ligands; light; liquid-solid interface; oxidation; perchlorates; phenol; photocatalysis; China; Show all 10 Subjects
Abstract:
... Nickel (hydr)oxide (NiOH) is known to be good co-catalyst for the photoelectrochemical oxidation of water, and for the photocatalytic oxidation of organics on different semiconductors. Herein we report a greatly improved activity of Bi₂MoO₆ (BMO) by nickel hexammine perchlorate (NiNH). Under visible light, phenol oxidation on BMO was slow. After NiNH, NiOH, and Ni²⁺ loading, a maximum rate of phen ...
nickel, etc ; adsorption; dyes; electrocoagulation; electrolysis; heavy metals; industry; methyl orange; polymers; spectroscopy; wastewater; China; Show all 12 Subjects
Abstract:
... Electrocoagulation (EC) has been widely used to treat the heavy metal wastewater in industry. A novel process of sinusoidal alternating current electrocoagulation (SACC) is adopted to remove Ni²⁺ in wastewater in this study. The morphology of precipitates and the distribution of the main functional iron configurations were investigated. Ferron timed complex spectroscopy can identify the monomeric ...
nickel; nickel oxide, etc ; air; carbon; carbonization; catalysts; catalytic activity; ceramics; hydrogenation; particle size; temperature; Show all 11 Subjects
Abstract:
... The preparation method of porous carbon coated honeycomb ceramic monolithic catalysts is limited to traditional ideas. The porous carbon and the active metal particles are formed step by step. We have designed a novel preparation method and constructed a series of nickel-embedded porous carbon-coated (Ni@C) monolithic catalysts with different carbonization temperatures. Through the synchronous for ...
... Reactions of β-formyl-β-nitroenamine with anilines afforded N,N’-diaryl-α-nitro-β-dialdimines; however, only small amounts of dialdimines were obtained when anilines possessing an electron-withdrawing group were employed. This disadvantage was overcome by adding anilinium salts to control the equilibrium, which resulted in the formation of dialdimines in considerably improved yields. This method f ...
... C(aryl)–C(═O) bonds of aryl amides can be activated and added across alkenes with the aid of a nickel catalyst. This 1,2-carboaminocarbonylation reaction enables the dicarbofunctionalization of alkenes with an atom economy of 100%. ...
... Graphene oxide being a low-cost material with multiple functionalities and well-known spectroscopic properties is studied for its preferential binding through its functional groups with Fe₃O₄, CoO, NiO, CuO and ZnO NPs using various techniques, where CoO nanoparticles have shown the highest binding affinity among these metal oxide nanoparticles. Transition metal oxide nanoparticles along with carb ...
... A nickel-catalyzed C–H heteroarylation of arenes has been described using a removable oxazoline-aniline derived directing group. Utilization of an inexpensive nickel(ii)-catalyst, substrate scope, functional group diversity and late-stage functionalization of xanthine-derived commercial drugs are the important practical features. ...
nickel, etc ; air; coagulants; hydrogen; microstructure; Show all 5 Subjects
Abstract:
... Highly-asymmetric metallic Ni hollow fiber membranes (NHFMs) with a dense inner skin layer and an outer porous substrate were fabricated by a modified phase inversion and sintering technique. A triple-orifice spinneret was used for spinning the hollow fiber precursors with water as the internal coagulant and a solvent-ethanol mixture as the temporary external coagulant. The hollow fiber precursors ...
... Five nickel chalcogenides have been studied and they showed high selectivity towards selective ethanol electro-oxidation to acetic acid. The activities of the different nickel chalcogenides are correlated with the Ni–Ni projected distances of the catalysts. ...
... The oxidative addition of aryl halides to bipyridine- or phenanthroline-ligated nickel(I) is a commonly proposed step in nickel catalysis. However, there is a scarcity of complexes of this type that both are well-defined and undergo oxidative addition with aryl halides, hampering organometallic studies of this process. We report the synthesis of a well-defined Ni(I) complex, [(Cᴼ²ᴱᵗbpy)NiᴵCl]₄ (1) ...
nickel; nickel oxide, etc ; Gibbs free energy; density functional theory; electrochemistry; electrodes; foams; nanorods; nanosheets; oxidation; oxygen production; Show all 11 Subjects
Abstract:
... Surface reconstruction of non-oxide oxygen evolution reaction (OER) electrocatalysts has been intensively studied to improve their catalytic performances. However, further modification of the reconstructed active surfaces for better catalytic performances has not been reported. In this work, NiSe nanorods are prepared on nickel foam (NiSe@NF) as the pre-catalyst for electrochemical OER. It is reve ...
nickel; nickel oxide, etc ; batteries; cobalt; electric potential difference; electrical conductivity; electrochemistry; electrodes; energy density; energy efficiency; oxygen; Show all 11 Subjects
Abstract:
... Hybrid Zn batteries, which couple two electrochemical reactions in one cell, attract research interests owing to the combination of high energy density and energy efficiency, and the electrode material is usually focused on metal oxides, such as nickel and cobalt oxides, which are restricted by the poor electric conductivity and limited cycling stability. In this work, a free-standing NiO@Co₃S₄ el ...
... A series of metal- and metal oxide-modified biochars were prepared to remove ammonia (NH₃). Maize straw was used as the precursor to fabricate biochar, four kinds of biochar with different metal modification were prepared by impregnation method, and the part of metal on the surface of biochar was converted to metal oxide after secondary pyrolysis. It was found that adsorption capacity of BC-Ni–O o ...
nickel, etc ; kinetics; phosphates; soil; solutes; sorption; Show all 6 Subjects
Abstract:
... In this study, the effect of phosphate on Ni sorption by Mahan soil was investigated. In batch experiments, an initial solution concentration of 1 mM phosphate increased Ni sorption by 15.1%, and initial concentrations of 1 mM Ni increased phosphate sorption by 12.8%. The effect of phosphate on Ni sorption, and vice versa, was dependent on initial concentrations of either solute, with greater effe ...
nickel oxide, etc ; acetone; ethanol; liquids; nanocrystals; Show all 5 Subjects
Abstract:
... Fabrication and processing approaches that facilitate the ease of patterning and the integration of nanomaterials into sensor platforms are of significant utility and interest. In this work, we report the use of laser-induced thermal voxels (LITV) to fabricate microscale, planar gas sensors directly from solutions of metal salts. LITV offers a facile platform to directly integrate nanocrystalline ...
nickel, etc ; catalytic activity; ligands; phosphine; regioselectivity; Show all 5 Subjects
Abstract:
... Herein, the first catalytic protocol for nickel-catalyzed ortho or para position difluoromethylation of various aromatic amines has been developed with the assistance of a bidentate phosphine ligand, offering an invaluable synthesis means to construct extensive p-difluoromethylated products and difluorooxindole derivatives with significant functional fragments. Furthermore, the gram-scale reaction ...
nickel, etc ; benzene; carboxylation; catalysts; free radicals; Show all 5 Subjects
Abstract:
... It has always been a challenge in free radical chemistry to control site selectivity during the reaction of free radicals with aromatic rings. Herein, we report the site-selective carboxylation of anisoles through the direct reaction of the bromoform radical with a benzene ring at the para position under the assistance of 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline with nickel(II) as the catalys ...
nickel, etc ; capacitance; electrochemical capacitors; electrochemistry; energy; Show all 5 Subjects
Abstract:
... Owing to the tremendous energy storage capacity of two-dimensional transition metal carbides (MXenes), they have been efficiently utilized as a promising candidate in the field of super-capacitors. The energy storage capacity of MXenes can be further enhanced using metal dopants. Herein, we have reported the synthesis of pristine and nickel doped niobium-carbide (Nb₂C) MXenes, their computational ...
nickel oxide, etc ; iodides; lighting; photostability; semiconductors; Show all 5 Subjects
Abstract:
... The heterointerface between a semiconducting metal oxide and a perovskite critically impacts on the overall performance of perovskite solar cells (PVSCs). Herein, we report a feasible yet effective strategy to suppress the interfacial reaction between nickel oxide and the perovskite via chemical passivation with self-assembled dyad molecules, which leads to the simultaneous improvement of the powe ...
nickel, etc ; acetone; alkenes; biomass; diamines; glycols; sulfur; Show all 7 Subjects
Abstract:
... 5,5-Dithiospiroketals are prepared by a double radical addition of α,α′-bisxanthyl acetone to an alkene followed by ionic or thermal cleavage of the xanthate groups and acid-catalyzed ring closure. A modification employs α-chloro-α′-xanthyl acetone to give unsymmetrical derivatives. Reductive removal of the sulfur atoms with Raney nickel furnishes long-chain α,ω-diacids, diols, and diamines. Using ...