Abstract Toluene is one of the most toxic pollutants of the air and catalytic oxidation is an effective technology for toluene removal. A series of mesoporous Co3O4 catalysts for toluene oxidation were successfully synthesized via pyrolysis of different morphologic Co-MOFs, involving ZIF-67, MOF-74 and ZSA-1 with N-donor, O-donor and N-O-donor linkers, respectively. The resulting Co3O4 catalysts exhibited different physicochemical properties such as exposed facets, Co3+/Co2+, Oads/Olatt, specific surface area, low temperature reducibility and so on. The morphology of the parent Co-MOFs and the content of C, N and O in the linkers are both pivotal in these differences. The Co3O4 catalysts also displayed differential catalytic activity and stability for toluene oxidation in the catalytic test. T90% of toluene over the Co3O4 catalysts is in the following order: ZSA-1-Co3O4 (N-O-ligand with octahedra shape) > MOF-74-Co3O4 (O-ligand with rod shape) > ZIF-67-Co3O4 (N-ligand with dodecahedral shape).

中文翻译：

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由具有不同形态和配体的 Co-MOF 衍生的介孔 Co3O4 用于甲苯催化氧化

摘要 甲苯是空气中毒性最强的污染物之一，催化氧化是去除甲苯的有效技术。通过热解不同形态的 Co-MOFs，成功合成了一系列用于甲苯氧化的介孔 Co3O4 催化剂，包括分别带有 N-供体、O-供体和 NO-供体接头的 ZIF-67、MOF-74 和 ZSA-1。所得Co3O4催化剂表现出不同的物理化学性质，如暴露面、Co3+/Co2+、Oads/Olatt、比表面积、低温还原性等。母体 Co-MOF 的形态和接头中 C、N 和 O 的含量都是造成这些差异的关键。在催化试验中，Co3O4 催化剂对甲苯氧化也表现出不同的催化活性和稳定性。