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  • 1
    Electronic Resource
    Electronic Resource
    Effect of oxygen and titanium contents on the stability of nanocrystalline Ti–Ru–Fe–O cathode materials for chlorate electrolysis (2000)
    Springer
    Journal of applied electrochemistry 30 (2000), S. 491-498 
    Details
    ISSN: 1572-8838
    Keywords: ball milling ; chlorate electrolysis ; electrocatalysis ; hydrogen evolution ; nanocrystalline
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Electrodes made from nanocrystalline Ti:Ru:Fe (2−y:1+y/2:1+y/2), with y varying from 0 to 1 by step of 0.25, and Ti:Ru:Fe:O (2:1:1:w), with w varying from 0 to 2 by step of 0.5, were prepared and tested as activated cathodes for the hydrogen evolution reaction in typical chlorate electrolysis conditions. These electrodes were subjected to an accelerated aging test, consisting of a succession of cycles of hydrogen discharge (HER) and open-circuit (OCP) conditions. In addition to monitoring the cathodic overpotential value during the aging test, visual inspection and mass loss measurements were performed on the electrodes at the end of the test to assess their stability. In the case of Ti:Ru:Fe (2:1:1), a large increase of the cathodic overpotential value is observed after 20 cycles. Adding O to the formulation causes a remarkable improvement of the long-term stability of the electrodes. As little as [O] = 10 at.% in nanocrystalline Ti:Ru:Fe:O (2:1:1:w) materials is sufficient for the electrode to show absolutely no sign of degradation after 50 cycles of HER/OCP, the longest accelerated test conducted. Adding more O to the formulation of the material does not lead to further stability improvement. A better stability under the conditions of the accelerated aging test can also be observed for nanocrystalline Ti:Ru:Fe (2−y:1+y/2:1+y/2) materials with y 〉 0. In that case however, the level of improvement is dependent on the value of y. The best results are obtained for y = 0.75. A hypothesis is proposed to explain the improved stability obtained by lowering the Ti content and/or by adding O. The similarity and difference between both ways of improving the stability of the nanocrystalline Ti:Ru:Fe materials are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003961417762
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  • 2
    Electronic Resource
    Electronic Resource
    A novel method to produce nanocrystalline metastable supported catalysts (1995)
    Springer
    Catalysis letters 35 (1995), S. 89-106 
    Details
    ISSN: 1572-879X
    Keywords: supported catalyst ; nanocrystalline alloys ; metastable alloys ; ball milling ; mechanical alloying ; surface
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The high energy ball-milling technique has been used to produce metastable Ni(Ru) alloys supported on alumina. This catalyst has potential application for the hydrogenation of the C=O bond. The active species are first formed by mechanical alloying pure Ni and Ru powders. The alumina support is ground independently until no structural transformation occurs. Finally, the supersaturated Ni(Ru) powder is milled with the alumina support to produce highly dispersed individual Ni(Ru) nanocrystals on the surface of Al2O3. This supported catalyst has been characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy and thermal desorption spectroscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807007
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  • 3
    Electronic Resource
    Electronic Resource
    1 3C-NMR-Spektroskopie an Polyäthern (1974)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 86 (1974), S. 450-450 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19740861216
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  • 4
    Electronic Resource
    Electronic Resource
    Polymere mit atropisomeren Biphenyl-Grundbausteinen (1967)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 79 (1967), S. 422-422 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19670790936
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  • 5
    Electronic Resource
    Electronic Resource
    Synthetische makromolekulare Stoffe mit reaktiven Gruppen (1957)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 69 (1957), S. 153-171 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird über Synthese, Eigenschaften und Reaktionen einiger makromolekularer Stoffe mit reaktiven Gruppen berichtet, und zwar über Derivate der Polyacrylsäure (Polyacrylsäure-hydrazid, Polyacrylhydroxamsäure, Polyacrylsäureamid), des Polyvinylalkohols, über Polyacrolein und Polymethacrolein, Polyvinylsulfonsäure und ihre Derivate sowie über Copolymere aus Styrol und Maleinsäureanhydrid. An den reaktiven Gruppen dieser polymeren Stoffe werden chemische Reaktionen ausgeführt. Dabei zeigt sich, daß unter Bedingungen, die dem makromolekularen Bau des Reaktionspartners angepaßt sind, eine Reihe von Reaktionen, die aus der niedermolekularen Chemie gut bekannt sind, auf solche Polymere übertragen werden können. Dadurch werden neue makromolekulare Stoffe zugänglich, die durch Polymerisation oder Polykondensation nicht zu erhalten sind.
    Additional Material: 10 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19570690502
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  • 6
    Electronic Resource
    Electronic Resource
    Neuere Untersuchungen über optisch aktive Polymere (1967)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 79 (1967), S. 280-280 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19670790621
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  • 7
    Electronic Resource
    Electronic Resource
    Recent Studies of Optically Active Polymers (1967)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 6 (1967), S. 271-271 
    Details
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.196702712
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  • 8
    Electronic Resource
    Electronic Resource
    Über den mit Säuren katalysierten Abbau von Poly-3,4-acrolein (1966)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 78 (1966), S. 613-613 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19660781156
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  • 9
    Electronic Resource
    Electronic Resource
    Methoden und Probleme beim Studium optisch aktiver Polymerer (1966)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 78 (1966), S. 909-909 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19660781821
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  • 10
    Electronic Resource
    Electronic Resource
    Acrolein Polymers (1964)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 3 (1964), S. 416-423 
    Details
    ISSN: 0570-0833
    Keywords: Polyacrolein ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The unsaturated aldehyde acrolein is a suitable source for different types of high polymers. If it is regarded as a 1,3-diene analogous to butadiene, then all the known modes of its polymerization can be systematically described and further possibilities predicted. A survey is given on this basis of the results obtained during the past decade. It is shown that acrolein is one of the few monomers which contain two polymerizable groups of differing reactivities. This fact allows the formation from acrolein of new homopolymers, copolymers, and graft copolymers, a scope which is not encountered with many other monomers.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.196404161
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