Feng Xilan, Liu Dapeng, Yan Baolin, Shao Mingzhe, Hao Zhimin, Yuan Guobao, Yu Haohan, Zhang Yu
Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, P. R. China.
Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, 100191, P. R. China.
Angew Chem Int Ed Engl. 2021 Aug 16;60(34):18552-18556. doi: 10.1002/anie.202107226. Epub 2021 Jul 19.
In this work, we have successfully triggered the aqueous auto-redox reactions between reductive Ce(OH) and oxidative MnO /Pd ions to form PdO/Mn O /CeO (PMC) nanocomposites. PMC could spontaneously self-assemble into compact encapsulation on the surface of halloysite nanotubes (HNTs) to form the final one dimensional HNTs supported PMCs (HPMC). It is identified that there exists strong synergistic effects among the components of PdO, Mn O , and CeO , and hence HPMC could show excellent performance on photoassisted thermal catalytic CH combustion that its light-off temperature was sharply reduced to be 180 °C under visible light irradiation. Based on detailed studies, it is found that the catalytic reaction process well follows the classic MVK mechanism, and adsorption/activation of O into active oxygen species (O*) should be the rate-determining step for CH conversion.
在本工作中，我们成功触发了还原性Ce(OH)与氧化性MnO /Pd离子之间的水相自氧化还原反应，以形成PdO/MnO /CeO (PMC)纳米复合材料。PMC能够自发地在埃洛石纳米管(HNTs)表面自组装成致密的封装结构，从而形成最终的一维HNTs负载的PMCs (HPMC)。研究发现，PdO、MnO 和CeO 的组分之间存在强烈的协同效应，因此HPMC在光辅助热催化CH燃烧方面表现出优异的性能，在可见光照射下其起燃温度急剧降至180°C。基于详细研究，发现催化反应过程很好地遵循经典的MVK机理，并且O吸附/活化为活性氧物种(O*)应该是CH转化的速率决定步骤。
