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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >Electrochemical synthesis of transition metal oxide nitrides with ε-TaN, δ-NbN and γ′-Mo2N structure type in a molten salt system
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Electrochemical synthesis of transition metal oxide nitrides with ε-TaN, δ-NbN and γ′-Mo2N structure type in a molten salt system

机译:熔盐体系中ε-TAN,δ-NBN和γ-MO2N结构型过渡金属氧化物氮化物的电化学合成

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摘要

The three nitrides ε-TaN, δ-NbN and γ′-Mo2N have been synthesized electrochemically from the elements at 450°C in a molten salt mixture LiCl/KCl:Li3N. For all compounds the working electrode consisting of a tantalum, niobium or molybdenum foil was anodically polarized and the system was fed with dry nitrogen. The applied constant voltage was 2.5 V (for ε-TaN), 2.2 V (for δ-NbN), and 2.8 V (for γ′-Mo2N). Chemical analysis on N and O resulted in compositions of TaN0.81(1)O0.13(2), NbN1.17(2)O0.28(1) and MoN0.88(1)O0.11(1), respectively. Lattice parameters of ε-TaN refined by the Rietveld method are a?=? 519.537(4) and c?=?291.021(3) pm. The other two nitrides crystallize in the cubic system (rocksalt type) with a?=?436.98(2) pm for δ-NbN and with a?=?417.25(2) pm for γ′-Mo2N.
机译:在熔融盐混合物LiCl / Kcl:Li3N中,从450℃的元素电化学中,在450℃下电化学地已经合成了三种氮ε-TAN,δ-NBN和γ-MO2N。 对于所有化合物,由钽,铌或钼箔组成的工作电极是阳极偏振的,并且用干燥的氮气进料。 施加的恒定电压为2.5V(对于ε-TAN),2.2V(对于δ-NBN)和2.8V(对于γ'-MO2N)。 N和O的化学分析得到Tan0.81(1)oO13(2),Nbn1.17(2)o0.28(1)和mon0.88(1)o0.11(1)的组合物。 。 RIETVELD方法精制的ε-TAN的晶格参数是a?=? 519.537(4)和C?=?291.021(3)PM。 另外两个氮化物在立方体系统(RocksAlt型)中结晶,具有Δ-nbn的Δ= 436.98(2)pm,并且对于γ'-mo2n,pm = 417.25(2)pm。

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