Abstract

Tuning the shape of tricobalt tetraoxide (Co₃O₄) nanoparticles has been verified to significantly alter the redox feature and the catalytic property. This morphology-dependent nanocatalysis is frequently interpreted with respect to the preferential exposure of the reactive crystal facets that allowed a dense population of active sites for catalysis. In particular, the rod-shaped Co₃O₄ nanoparticles, typically exposing a substantial fraction of the (110) facet, are featured by the coexistence of tetrahedral Co²⁺ and octahedral Co³⁺ sites that are intimately linked to the catalytic activity toward oxidation reactions. Continuous accumulation of experimental data over various Co₃O₄ nanostructures has gradually clarified that identifying the active sites requires to consider the restructuring of the nanoparticles under the reaction conditions. Moreover, the synergistic effect between the reactive facet and its neighboring less-active facets could not be simply ruled out.

Graphical abstract

中文翻译：

---

形态学依赖的纳米催化：三氧化三钴

摘要

已经证明调节三氧化三钴（Co ₃ O ₄）纳米颗粒的形状可以显着改变氧化还原特性和催化性能。这种形态学相关的纳米催化经常被解释为优先暴露的反应性晶面，从而允许密集的活性位点进行催化。尤其是，棒状的Co ₃ O ₄纳米颗粒通常会暴露大部分（110）面，其特征是四面体Co ²⁺和八面体Co ³⁺位点并存，这些位点与催化活性密切相关。氧化反应。不断积累各种Co上的实验数据₃ O ₄纳米结构已逐渐阐明，识别活性位点需要考虑在反应条件下纳米颗粒的重构。此外，不能简单地排除反应性小平面与其相邻的不太活跃的小平面之间的协同效应。

图形概要