钠催化石墨层间化合物的快速形成
Dramatically Accelerated Formation of Graphite Intercalation Compounds Catalyzed by Sodium
摘要：
石墨层间化合物（GIC）由于其丰富的材料变化而具有多种功能，并且因此，用于其合成的创新方法对于实际应用是期望的。我们已经发现Na具有催化性质，其显著加速GIC的形成。我们证明了LiC 6 n（n = 1，2），KC 8，KC 12 n（n = 2，3，4）和NaCx可以通过在室温（~25 °C）下将碱金属和石墨粉与Na混合来简单地合成，而AEC 6（AE = Ca，Sr，Ba）可以通过在250 °C下加热Na添加的试剂几个小时来合成。通过C和Na的混合形成的NaCx被理解为充当催化剂的反应中间体，从而通过降低嵌入的活化能来加速GIC的形成。钠催化的方法，使快速和大规模合成均匀的GIC样品在一个显着简单的方式比传统的方法，预计将刺激研究和开发GIC应用。
英文摘要：
Graphite intercalation compounds (GICs) have a variety of functions due to their rich material variations, and thus,innovative methods for their synthesis are desired for practical applications. We have discovered that Na has a catalytic property that dramatically accelerates the formation of GICs. We demonstrate that LiC6n (n = 1, 2), KC8, KC12n (n = 2, 3, 4), and NaCx are synthesized simply by mixing alkali metals and graphite powder with Na at room temperature (~25 °C), and AEC6 (AE = Ca, Sr, Ba) are synthesized by heating Na-added reagents at 250 °C only for a few hours. The NaCx, formed by the mixing of C and Na, is understood to act as a reaction intermediate for a catalyst, thereby accelerating the formation of GICs by lowering the activation energy of intercalation. The Na-catalyzed method, which enables the rapid and mass synthesis of homogeneous GIC samples in a significantly simpler manner than conventional methods, is anticipated to stimulate research and development for GIC applications.
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