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2.328 Aktuelle Fachpublikationen zum Thema temperature

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BaCoO2.22 : the most oxygen-deficient certified cubic perovskite

28.02.2015 | Olivier Mentré; Mihaela IORGULESCU; Marielle Huvé; Houria Kabbour; Nicolas Renaut; Sylvie Daviero-Minaud; silviu Col ..., Dalton Transactions, 2015

The cubic BaCoO±2.2 was announced in the early 50’s as the final product of high temperature self-reduction within the BaCoO3-δ series. However apart from this report no clear characterization was provided up-to-date. Here we confirm after preparation of single crystal and powder samples that in ...

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Surface controlled reduction kinetics of nominally undoped polycrystalline CeO2

27.02.2015 | Nicole Knoblauch; Lars Dörrer; Peter Fielitz; Martin Schmücker; Günter Borchardt, Physical Chemistry Chemical Physics, 2015

Ceria is an interesting material for high temperature redox applications like solar-thermal splitting of CO2 and H2O. Technical implementation and reactor design for solar-thermal redox-based fuel generation requires reliable data for the chemical surface exchange coefficient and the chemical ...

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A one-pot strategy to synthesize [small beta]-ketophosphonates: silver/copper catalyzed direct oxyphosphorylation of alkynes with H-phosphonates and oxygen in the air

27.02.2015 | Xin Chen; Xu Li; Xiao-Lan Chen; Ling-Bo Qu; Jian-Yu Chen; Kai Sun; Zhi-Dong Liu; Wen-Zhu Bi; Ying-Ya Xia; Hai-Tao Wu ..., Chemical Communication, 2015

A highly efficient one-pot strategy has been developed for the synthesis of β-ketophosphonates directly from alkynes and dialkyl H-phosphonates in the presence of widely available AgNO3/CuSO4 and K2S2O8 at room temperature under open-air conditions.

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Oxygen nonstoichiometry, defect equilibrium model and thermodynamic quantities in the Ruddlesden?Popper oxide Sr3Fe2O7-?

26.02.2015 | Yihan Ling; Fang WANG; Riyan Achmad Budiman; Takashi Nakamura; Koji Amezawa, Physical Chemistry Chemical Physics, 2015

Oxygen nonstoichiometry of the Ruddlesden–Popper oxide Sr3Fe2O7-δ was measured at intermediate temperatures (773–1073K) by the coulometric titration and the high temperature gravimetry. The oxygen nonstoichiometric behavior was analyzed by the defect equilibrium model with localized electrons. ...

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Post-synthesis functionalization of a zeolitic imidazolate structure ZIF-90: a study on removal of Hg(II) from water and epoxidation of alkenes

25.02.2015 | Samiran Bhattacharjee; Yu-Ri Lee; Wha-Seung Ahn, CrystEngComm, 2015

Thiol-functionalized ZIF-90 (ZIF-90-SH) and its Mn(II)-immobilized form (ZIF-90-S[Mn]) were prepared. The former exhibited an Hg2+ adsorption capacity of ca.22.4 mgg-1 at room temperature and ZIF-90-S[Mn] showed good catalytic performance in the epoxidation of several important alkenes using ...

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Microwave selective effect: a new approach towards oxygen inhibition removal for highly-effective NO decomposition by microwave catalysis over BaMnxMg1−xO3 mixed oxides at low temperature under excess oxygen

24.02.2015 | Wentao Xu; Jicheng Zhou; Yingpiao Ou; Yushang Luo; Zhimin You, Chemical Communication, 2015

A significant microwave selective effect on oxygen inhibition removal was found for NO decomposition through microwave catalysis over BaMnxMg1−xO3 catalysts. Especially, the NO conversion and N2 selectivity were up to 99.8% and 99.9%, respectively for the BaMn0.9Mg0.1O3 catalyst even with the ...

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Point defects assisted NH3 gas sensing properties in ZnO nanostructures

22.02.2015 | Author(s): P. Sundara Venkatesh , P. Dharmaraj , V. Purushothaman , V. Ramakrishnan , K. Jeganathan, Sensors and Actuators B: Chemical, 2015

Publication date: June 2015 Source:Sensors and Actuators B: Chemical, Volume 212 Author(s): P. Sundara Venkatesh , P. Dharmaraj , V. Purushothaman , V. Ramakrishnan , K. Jeganathan In this report, the NH3 gas sensing properties of ZnO nanostructures fabricated by radio frequency ...

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New Ruthenium Nitrosyl Pincer Complexes Bearing an O2 Ligand. Mono-Oxygen Transfer

19.02.2015 | Eran Fogler; Irena Efremenko; Moti Gargir; Gregory Leitus; Yael Diskin-Posner; Yehoshoa Ben-David; Jan M. L. Martin; ..., Inorganic Chemistry, 2015

We report on Ru(II)(μ2-O2) nitrosyl pincer complexes that can return to their original Ru(0) state by reaction with mono-oxygen scavengers. Potential intermediates were calculated by density functional theory (DFT) and a mechanism is proposed, revealing a new type of metal–ligand cooperation ...

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Electronic Structure of Low‐Temperature Solution‐Processed Amorphous Metal Oxide Semiconductors for Thin‐Film Transistor Applications

18.02.2015 | Josephine Socratous, Kulbinder K. Banger, Yana Vaynzof, Aditya Sadhanala, Adam D. Brown, Alessandro Sepe, Ullrich St ..., Advanced Functional Materials, 2015

The electronic structure of low temperature, solution‐processed indium–zinc oxide thin‐film transistors is complex and remains insufficiently understood. As commonly observed, high device performance with mobility >1 cm2 V−1 s−1 is achievable after annealing in air above typically 250 °C but ...

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Titanium-Defected Undoped Anatase TiO2 with p-Type Conductivity, Room-Temperature Ferromagnetism, and Remarkable Photocatalytic Performance

18.02.2015 | Songbo Wang; Lun Pan; Jia-Jia Song; Wenbo Mi; Ji-Jun Zou; Li Wang; Xiangwen Zhang, Journal of the American Chemical Society, 2015

Defects are critically important for metal oxides in chemical and physical applications. Compared with the often studied oxygen vacancies, engineering metal vacancies in n-type undoped metal oxides is still a great challenge, and the effect of metal vacancies on the physiochemical properties is ...

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