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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Reactivity of niobium-carbon cluster ions with hydrogen molecules in relation to formation mechanism of Met-Car cluster ions
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Reactivity of niobium-carbon cluster ions with hydrogen molecules in relation to formation mechanism of Met-Car cluster ions

机译:铌-碳簇离子与氢分子的反应性与Met-Car簇离子的形成机理相关

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摘要

It is known that a niobium-carbon Met-Car cluster ion (Nb8C12+) and its intermediates (Nb4C4+, Nb6C7+, etc.) are selectively formed by the aggregation of the Nb atoms in the presence of hydrocarbons. To elucidate the formation mechanism, we prepared NbnCm+ with every combination of n and m in the gas phase by the laser vaporization technique. The reactivity of NbnCm+ with H-2 was examined under the multiple collision condition, finding that NbnCm+ between Nb2C3+ and Nb8C12+ are not reactive with H-2. On the basis of the H-2 affinity of NbnCm+ experimentally obtained, we propose a dehydrogenation-controlled formation mechanism of niobium-carbon Met-Car cluster ions.
机译:已知在碳氢化合物的存在下通过Nb原子的聚集选择性地形成铌-碳的Met-Car簇离子(Nb8C12 +)及其中间体(Nb4C4 +,Nb6C7 +等)。为了阐明其形成机理,我们通过激光汽化技术制备了NbnCm +,其中n和m分别在气相中存在。在多次碰撞条件下检查了NbnCm +与H-2的反应性,发现Nb2C3 +和Nb8C12 +之间的NbnCm +与H-2不反应。基于实验获得的NbnCm +的H-2亲和力,我们提出了脱碳控制的铌碳Met-Car簇离子的形成机理。

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