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

利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。在铂电极上，以萘为介体，在2.94V(Ag/Ag^+)下电解氯苯。苯是生产的主要产品。通过介体的反应一般不依赖于电极，因为它是均相催化反应。然而，表面结构影响苯(J&lt；C6H6&gt；)的部分电流密度：PT(111)&lt；铂(110)铂(100)。在银电极上，在介体的作用下，J&lt；C6H6&gt；在反应中没有显示出结构效应。在没有介体的情况下，在铂电极上进行电解时，可以得到与有介体时相同的结构效应，而在没有介体的情况下，没有银电极在2.94V(AgF银离子)下还原氯苯。氯苯的直接还原路径导致了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-3.17V(Ag/Ag^+)下将氯苯还原为苯，而不需要介体。价值。J&lt；C6H6&gt；取决于表面结构如下：Ag(110)N Ag(111)和lt；Ag(100)。(100)阶梯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.