通讯：银和金团簇阳离子促进 CO 氧化：不同活性氧物种的鉴定。

Communication: CO oxidation by silver and gold cluster cations: identification of different active oxygen species.

机构信息

Institute of Surface Chemistry and Catalysis, University of Ulm, Albert-Einstein-Allee 47, 89069 Ulm, Germany.

出版信息

J Chem Phys. 2011 Mar 7;134(9):091102. doi: 10.1063/1.3563631.

Abstract

The oxidation of carbon monoxide with nitrous oxide on mass-selected Au(3)(+) and Ag(3)(+) clusters has been investigated under multicollision conditions in an octopole ion trap experiment. The comparative study reveals that for both gold and silver cations carbon dioxide is formed on the clusters. However, whereas in the case of Au(3)(+) the cluster itself acts as reactive species that facilitates the formation of CO(2) from N(2)O and CO, for silver the oxidized clusters Ag(3)O(x)(+) (n=1-3) are identified as active in the CO oxidation reaction. Thus, in the case of the silver cluster cations N(2)O is dissociated and one oxygen atom is suggested to directly react with CO, whereas a second kind of oxygen strongly bound to silver is acting as a substrate for the reaction.

摘要

在八极离子阱实验中，在多碰撞条件下研究了一氧化碳与一氧化二氮在质量选择的 Au(3)(+)和 Ag(3)(+)簇上的氧化反应。比较研究表明，对于金和银阳离子，二氧化碳都在簇上形成。然而，对于 Au(3)(+)，簇本身充当反应性物种，促进 N(2)O 和 CO 形成 CO(2)，而对于银，氧化的 Ag(3)O(x)(+)（n=1-3）簇被鉴定为在 CO 氧化反应中具有活性。因此，在银簇阳离子的情况下，N(2)O 被解离，一个氧原子被建议与 CO 直接反应，而与银强烈结合的第二种氧则作为反应的底物。