Study on the nanostructures enhancing the activity for dechlorination of aromatic organic chlorides

本文用铂和银在乙腈溶液中的低指数面研究了结构对氯苯脱氯速率的影响。以萘为介体，在2.94 V（Ag/Ag^+）下，氯苯在铂电极上电解。苯作为主要产品生产。通过介体的反应通常不依赖于电极，因为它是均相催化反应。而表面结构则影响苯的部分电流密度（j_<C6H6>）：Pt（111）&lt; Pt（110）Pt（100）。在银电极上，<C6H6>在使用介体的反应中，j_不显示结构效应。在没有介体的情况下，电解产生的结构效应与在铂电极上有介体时相同，而在没有介体的情况下，没有银电极在2.94 V（Agf Ag^+）下还原氯苯。氯苯的直接还原路径导致铂电极上与介体反应的反常结构效应。银电极在更负的电位-3.17 V（Ag/Ag^+）下将氯苯还原为苯，而不需要介体。价值。Ag<C6H6>（110）N Ag（111）&lt; Ag（100）。（100）阶地对氯苯具有较高的脱氯活性。

Structural effects on the rate of the dechlorination of chlorobenzene have been studied using the low index planes of platinum and silver in acetonilrile solution. Chlorobenzene is electrolyzed on platinum electrodes using naphthalene as a mediator at 2.94 V (Ag/Ag^+). Benzene is produced as a main product. A reaction via a mediator does not depend on electrodes generally, because it is a homogeneous catalytic reaction. Surface structure, however, affects the partial current density of benzene (j_<C6H6>): Pt(111) < Pt(110) Pt(100). On silver electrodes, j_<C6H6> shows no structural effect in the reaction using a mediator. Electrolysis without a mediator gives the same structural effect as that with a mediator on platinum electrodes, whereas no silver electrode reduces chlorobenzene at 2.94 V (Agf Ag^+) without a mediator. The direct reduction path of chlorobenzene causes the anomalous structural effect on the reaction with a mediator on platinum electrodes. Silver electrodes reduce chlorobenzene to benzene at more negative potential -3.17 V (Ag/Ag^+) without a mediator. The value. of j_<C6H6> depends on the surface structure as follows : Ag(110) N Ag(111) < Ag(100). The (100) terrace has high activity for the dechlorination of chlorobenzene.