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2.237 Aktuelle Fachpublikationen zum Thema temperature

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Room temperature electrochemical synthesis of N-doped Graphene and its electrocatalytic activity for oxygen reduction

29.10.2014 | Feng-Xiang Ma; Jiong Wang; Feng-bin Wang; Xinghua Xia, Chemical Communication, 2014

We report a facile and green electrochemical method using graphene oxide as precursor to synthesize nitrogen doped graphene at room temperature in ammonia containing aqueous solution. The nitrogen doping content reaches of 3.3 at%, and the resultant NG shows excellent activity toward oxygen ...

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Hydrogen-bond relaxation dynamics: Resolving mysteries of water ice

26.10.2014 | Author(s): Yongli Huang , Xi Zhang , Zengsheng Ma , Yichun Zhou , Weitao Zheng , Ji Zhou , Chang Q. Sun, Coordination Chemistry Reviews, 2014

Publication date: Available online 23 October 2014 Source:Coordination Chemistry Reviews Author(s): Yongli Huang , Xi Zhang , Zengsheng Ma , Yichun Zhou , Weitao Zheng , Ji Zhou , Chang Q. Sun We present recent progress in understanding the anomalous behavior of water ice under ...

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Impact of oxygen transport properties on the kinetic modeling of polypropylene thermal oxidation. II. Effect of oxygen diffusivity

23.10.2014 | Alexandre François‐Heude, Emmanuel Richaud, Alain Guinault, Eric Desnoux, Xavier Colin, Journal of Applied Polymer Science, 2014

ABSTRACT The kinetic model, established in a previous article (François‐Heude et al., J. Appl. Polym. Sci., in press) to predict the homogeneous oxidation in iPP films typically thinner than 100 µm, is now extended to simulate the oxidation profiles in thicker plates by coupling the oxygen ...

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Nanoscale Ordering in Oxygen Deficient Quintuple Perovskite Sm2-εBa3+εFe5O15-δ: Implication for Magnetism and Oxygen Stoichiometry

23.10.2014 | Nadezhda E. Volkova; Oleg I. Lebedev; Ludmila Ya. Gavrilova; Stuart Turner; Nicolas Gauquelin; Md. Motin Seikh; Vinc ..., Chemistry of Materials, 2014

The investigation of the system Sm–Ba–Fe-O in air has allowed an oxygen deficient perovskite Sm2-εBa3+εFe5O15-δ (δ = 0.75, ε = 0.125) to be synthesized. In contrast to the XRPD pattern which gives a cubic symmetry (ap = 3.934 Å), the combined HREM/EELS study shows that this phase is nanoscale ...

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Spectroscopic Investigation of the Wettability of Multilayer Graphene Using Highly Ordered Pyrolytic Graphite as a Model Material

23.10.2014 | Ali Ashraf; Yanbin Wu; Michael C. Wang; Narayana R. Aluru; Seyed A. Dastgheib; SungWoo Nam, Langmuir, 2014

We report the intrinsic water contact angle (WCA) of multilayer graphene, explore different methods of cleaning multilayer graphene, and evaluate the efficiency of those methods on the basis of spectroscopic analysis. Highly ordered pyrolytic graphite (HOPG) was used as a model material system to ...

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Electrochemical degradation of tramadol hydrochloride: Novel use of potentiometric carbon paste electrodes as a tracer

21.10.2014 | Author(s): Nasser Abu Ghalwa , Hazem M. Abu-Shawish , Farid R. Zaggout , Salman M. Saadeh , Ayoub R. Al-Dalou , ..., Arabian Journal of Chemistry, 2014

Publication date: November 2014 Source:Arabian Journal of Chemistry, Volume 7, Issue 5 Author(s): Nasser Abu Ghalwa , Hazem M. Abu-Shawish , Farid R. Zaggout , Salman M. Saadeh , Ayoub R. Al-Dalou , Anwar A. Abou Assi The electrochemical removal of tramadol hydrochloride from aqueous ...

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In‐Situ Confined Growth of Monodisperse Pt Nanoparticle@Graphene Nanobox Composites as Electrocatalytic Nanoreactors

20.10.2014 | Yingying Lv, Yin Fang, Zhangxiong Wu, Xufang Qian, Yanfang Song, Renchao Che, Abdullah M. Asiri, Yongyao Xia, Bo Tu, ..., Small, 2014

Monodisperse Pt nanoparticles (NPs) studded in a three‐dimensional (3D) graphene nanobox are successfully synthesized through a simple in‐situ confined growth route for the first time. The nano‐zeolite A was used as a 3D substrate for in‐situ growth of tri‐layered graphenes on the ...

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Light and Atmosphere Affect the Quasi‐equilibrium States of Graphite Oxide and Graphene Oxide Powders

20.10.2014 | Chun Kiang Chua, Martin Pumera, Small, 2014

Graphite oxide (GiO) and graphene oxide (GeO) possess wide applicability in technological devices. The exact chemical compositions, structures, and properties of these materials remain vague to the graphene community despite being heavily researched. As metastable materials, the properties of ...

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Impact of oxygen transport properties on polypropylene thermal oxidation, part 1: Effect of oxygen solubility

18.10.2014 | Alexandre François‐Heude, Emmanuel Richaud, Alain Guinault, Eric Desnoux, Xavier Colin, Journal of Applied Polymer Science, 2014

ABSTRACT A general kinetic model is proposed to describe the polypropylene thermal oxidation of thin polypropylene films in a wide range of temperatures (from 60 to 200°C) and oxygen partial pressures (from 0.02 to 5 MPa) using a single set of parameters. This model was calibrated with several ...

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Transition metal oxide catalysts as an alternative for the oxidation of nitrogen monoxide to nitrogen dioxide: kinetic modelling at high space velocity

18.10.2014 | Leonardo Tecchio, Pablo Marín, Fernando V. Díez, Salvador Ordóñez, Journal of Chemical Technology & Biotechnology, 2014

Abstract Background The oxidation of NO to NO2 is a key step in environmental pollution abatement techniques, such as the “fast‐SCR” or the diesel engines catalytic traps. In both cases, the conversion of an important fraction of NO into NO2 is a key step. In this work, two commercially ...

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