Showing papers on "Nickel boride published in 2003"
TL;DR: In this article, a nickel boride catalyst (NixB) was used for catalytic hydrolysis of alkaline NaBH4 solution and it was found that after heat treatment at 150°C in vacuum the NixB catalyst shows greatly enhanced catalytic activity and operational stability.
320 citations
TL;DR: In this article, the scope of nickel boride mediated reduction of nitriles has been extended further to allow the preparation of Boc protected amines via a mild catalytic process.
118 citations
TL;DR: In this article, a one-pot approach for the synthesis of aryl substituted quinazolin-4(3H)-ones and 2,3-dihydro-4 (1H)-quinazolinones has been reported.
64 citations
TL;DR: In this paper, the fine structure of the BK ionization edge of the nano-scalic product with that of amorphous boron and crystalline nickel boride was analyzed by means of X-ray diffraction, electron microscopy and electron energy loss spectroscopy.
38 citations
TL;DR: An environmentally benign SBA-15-supported amorphous nickel boride alloy catalyst, prepared by a novel reductant-impregnation method, exhibits superior activity, selectivity, and stability in the selective hydrogenation of 2-ethylanthraquinone (eAQ) to H 2 eAQ, which is the dominating process for the production of hydrogen peroxide in industrial scale as discussed by the authors.
31 citations
TL;DR: In this paper, the authors used an electroless nickel boron (EN-B) plating preceded by the application of a protective zincating/electroless nickel phosphorus coating.
10 citations
Patent•
26 Mar 2003TL;DR: In this paper, a conductive paste for a terminal electrode which suppresses oxidation of the Ni surface of an internal conductor and therefore brings about excellent joining with Ni even when baking is performed in the atmosphere is presented.
Abstract: Provided is a Ag-based conductive paste for a terminal electrode which suppresses oxidation of the Ni surface of an internal conductor and therefore brings about excellent joining with Ni even when baking is performed in the atmosphere in the case where Ni is used as the internal conductor of a laminated ceramic electronic component. The conductive paste includes at least one of an Ag powder and an Ag alloy powder, a nickel boride powder, an inorganic binder and an organic vehicle, wherein the quantity of the nickel boride powder is within the range of about 5% by weight or more, but less than about 60% by weight of the total paste.
6 citations
TL;DR: In this article, the scope of nickel boride mediated reduction of nitriles has been extended further to allow the preparation of Boc protected amines via a mild catalytic process.
Abstract: The scope of nickel boride mediated reduction of nitriles has been extended further to allow the preparation of Boc protected amines via a mild catalytic process. It is noteworthy that the toxicity of this procedure is greatly reduced due to its catalytic nature in nickel(II) chloride used in combination with excess sodium borohydride. The protocol is marked by its resilience towards air and moisture and hence an easy and general practical protocol.
6 citations
TL;DR: In this paper, the fine structure of the BK ionization edge of the nano-scalic product with that of amorphous boron and crystalline nickel boride was analyzed by means of X-ray diffraction, electron microscopy and electron energy loss spectroscopy.
Abstract: Black amorphous precipitates of unknown composition have been obtained from aqueous solutions of sodium tetrahydridoborate and nickel salts. These precipitates have been analyzed by means of X-ray diffraction, electron microscopy, and electron energy loss spectroscopy, especially focussing on the energy-loss near-edge structure. By comparing the fine structure of the BK ionization edge of the nano-scalic product with that of amorphous boron and crystalline nickel boride, we show that the primary precipitate contains a metal boride formed at room temperature. The precipitate exhibits catalytic activity, e.g. for arylations of arylhalogenides. When annealed, the primary product transforms into crystalline Ni3B. An earlier crystal structure determination of Ni3B was confirmed by Rietveld refinement of highly resolved synchrotron data.
TL;DR: Nickel boride is reported to bring about desulfurization and reductive cleavage of N,N′-diarylthioureas to give corresponding anilines and N-methylanilines.
Abstract: Nickel boride is reported to bring about desulfurization and reductive cleavage of N,N′-diarylthioureas to give corresponding anilines and N-methylanilines while N,N′-dialkylthioureas have been observed to undergo desulfurization to give formamidines; benzimidazoline-2-thiones are reported to undergo desulfurization to benzimidazoles and 1,3-dihydro-1,3-diaryl-2-thioxopyrimidine-4,6(2H,5H)-diones have been observed to yield corresponding hexahydropyrimidine-4,6-diones in high yields in dry methanol at ambient temperature.