氧化物
催化作用
化学吸附
纳米颗粒
材料科学
反应性(心理学)
金属
化学物理
纳米技术
多相催化
化学工程
选择性
分子
化学
有机化学
冶金
病理
替代医学
工程类
医学
作者
Yan Zhou,Yong Li,Wenjie Shen
标识
DOI:10.1002/asia.201600115
摘要
Abstract The fabrication of oxide particles with tunable sizes and shapes at the nanoscale is one of the most crucial issues for the design and development of highly efficient heterogeneous catalysts. The shape of oxide nanoparticles has been demonstrated to affect their catalytic properties remarkably. Tuning the shape of oxide particles allows preferential exposure of specific reactive facets; this can maximize the number of active sites available to the reactants, which can improve the activity and also mediate the reaction route to a specific channel to achieve higher selectivity for a particular chemical reaction. In addition, the shape of the oxide particles affects their interaction with metal particles or clusters, and this involves interfacial strain and charge transfer. Metal particles or clusters dispersed on the reactive or polar facets of the oxide support often provide superior catalytic performance, primarily because of strong metal–support interactions. However, the geometric and electronic features of the metal‐oxide interface may change during the course of the reaction, induced by chemisorption of reactive molecules at elevated temperatures, which should be taken into account in proposing a structure–reactivity relationship.
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