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Molecular material based on electropolymerized cobalt macrocycle for electrocatalytic hydrogen evolution

23-Apr-2015 | Stephane Rioual; Benoit Lescop; François Quentel; Frederic Gloaguen, Physical Chemistry Chemical Physics, 2015

Electrocatalytic material for the H2 evolution reaction (HER) in acidic aqueous solution has been prepared by electropolymerization of Co(II) dibenzotetraaza[14] annulene (CoTAA). Chemical analysis by X-ray photoelectron spectroscopy (XPS) confirms that the structural integrity of the [CoII-N4] ...

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Sustainable Hydrogen Production by Ethanol Steam Reforming using a Partially Reduced Copper–Nickel Oxide Catalyst

16-Apr-2015 | Li‐Chung Chen, Hongkui Cheng, Chih‐Wei Chiang, Shawn D. Lin, ChemSusChem, 2015

Abstract Hydrogen production through the use of renewable raw materials and renewable energy is crucial for advancing its applications as an energy carrier. In this study, we fabricated a solid oxide solution of Cu and Ni within a confined pore space, followed by a partial reduction, to ...

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The Stabilizing Role of the Intramolecular C–H···O Hydrogen Bond in Cyclic Amides Derived From α-Methylbenzylamine

14-Apr-2015 | Jacinto Sandoval-Lira; Lilia Fuentes; Leticia Quintero; Herbert Höpfl; Julio M. Hernández-Pérez; Joel L. Terán; Fern ..., The Journal of Organic Chemistry, 2015

A series of five-, six-, seven-, and eight-membered lactams containing the chiral auxiliary α-methylbenzylamine were structurally analyzed and further studied by DFT calculations with the purpose to examine with detail the previously detected intramolecular C–H···O hydrogen-bonding interaction ...

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The Cobalt Hydride that Never Was: Revisiting Schrauzer’s “Hydridocobaloxime”

06-Apr-2015 | David C. Lacy; Gerri M. Roberts; Jonas C. Peters, Journal of the American Chemical Society, 2015

Molecular cobalt-dmg (dmg = dimethylglyoxime) complexes are an important class of electrocatalysts used heavily in mechanistic model studies of the hydrogen evolution reaction (HER). Schrauzer’s early isolation of a phosphine-stabilized “[H-CoIII(dmgH)2P(nBu)3]” complex has long provided ...

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High Strength Chitosan Hydrogels with Biocompatibility via New Avenue Based on Constructing Nanofibrous Architecture

06-Apr-2015 | Jiangjiang Duan; Xichao Liang; Yan Cao; Sen Wang; Lina Zhang, Macromolecules, 2015

Breaking the limitation of traditional acid dissolving methods for chitosan by creating an alkali/urea hydrogen-bonded chitosan complex, a new solvent (4.5 wt % LiOH/7 wt % KOH/8 wt % urea aqueous solution) was used to successfully dissolve chitosan via the freezing–thawing process, for the first ...

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Mechanism of fiber/matrix bond and properties of wood polymer composites produced from alkaline treated Daniella oliveri wood flour

05-Apr-2015 | Eyitayo Olatunde Olakanmi, Emmanuel Ademola Ogunesan, Ephraim Vunain, Ruth Anayimi Lafia‐Araga, Mulalo Doyoyo, Reino ..., Polymer Composites, 2015

The effects of sodium hydroxide (NaOH) concentration and time of treatment on the mechanism of fiber/matrix bond and functional properties of Daniella oliveri reinforced wood polymer composites (WPCs) were investigated. The WPCs were evaluated using Fourier transform infrared (FTIR) ...

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Sol Processing of Conjugated Carbon Nitride Powders for Thin‐Film Fabrication

01-Apr-2015 | Jinshui Zhang, Mingwen Zhang, Lihua Lin, Xinchen Wang, Angewandte Chemie International Edition, 2015

Abstract The chemical protonation of graphitic carbon nitride (CN) solids with strong oxidizing acids, for example HNO3, is demonstrated as an efficient pathway for the sol processing of a stable CN colloidal suspension, which can be translated into thin films by dip/disperse‐coating ...

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Dynamics of Bimolecular Reactions in Solution

01-Apr-2015 | Andrew J. Orr-Ewing, Annual Review of Physical Chemistry, 2015

Mechanisms of bimolecular chemical reactions in solution are amenable to study on picosecond timescales, both by transient absorption spectroscopy and by computer simulation. The dynamics of exothermic reactions of CN radicals and of Cl and F atoms with organic solutes in commonly used solvents ...

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Supramolecular Self‐Assembly of Cucurbit[6]uil and Ionic Liquid in Non‐aqueous System

30-Mar-2015 | Xuzhuo Sun, Bo Li, Haibo Zhang, Xiaohai Zhou, Chinese Journal of Chemistry, 2015

Abstract A novel [2]pseudorotaxane of cucurbit[6]uril(CB[6]) and 1‐butyl‐3‐methyl‐imidazolium bromide ([C4mim]Br) was synthesized by directly mixing the host and the guest molecules in non‐aqueous system. Structural characterizations of the [2]pseudorotaxane were carried out by 1D, 2D NMR and ...

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Tailoring the Properties of Ammine Metal Borohydrides for Solid‐State Hydrogen Storage

27-Mar-2015 | Lars H. Jepsen, Morten B. Ley, Yaroslav Filinchuk, Flemming Besenbacher, Torben R. Jensen, ChemSusChem, 2015

Abstract A series of halide‐free ammine manganese borohydrides, Mn(BH4)2⋅nNH3, n=1, 2, 3, and 6, a new bimetallic compound Li2Mn(BH4)4⋅6NH3, and the first ammine metal borohydride solid solution Mg1−xMnx(BH4)2⋅6NH3 are presented. Four new crystal structures have been determined by synchrotron ...

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