The pursuit of modern sustainable chemistry has stimulated the development of innovative catalytic processes that enable chemical transformations to be performed under mild and clean conditions with high efficiency. Here, an amorphous sheet‐like MnO₂ (Ce‐doped MnO₂: CMBO) was obtained after Ce doping, which exhibits excellent catalytic performance for the oxidation coupling of alcohol and aniline. Conversion of 99% and a selectivity of 99% could be achieved within 6 h at 60 ^oC under air atmosphere, and the formation rate of target product was up to 30.2 μmol·h^–1·m^–2. Based on a series of characterizations, it was found that the doping of Ce into the MnO₂ could increase the concentration of the oxygen vacancies, thus forming abundant active surface oxygen species and favoring the mobility of lattice oxygen, which are the main reasons for the greatly enhanced catalytic performance of CMBO. This work indicates that increasing oxygen vacancy by element doping may serve as a facile and efficient way to enhance catalytic performance of transition metal oxide.

中文翻译：

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Ce掺杂的Mno2上亚胺催化Ce掺杂诱导的氧空位的见解

对现代可持续化学的追求促进了创新催化工艺的发展，该催化工艺使化学转化能够在温和干净的条件下高效地进行。此处，在Ce掺杂后获得了无定形的片状MnO ₂（Ce掺杂的MnO ₂：CMBO），它对醇和苯胺的氧化偶联具有优异的催化性能。在空气中60 ^o C下，在6 h内可实现99％的转化率和99％的选择性，目标产物的形成率高达30.2μmol·h ^–1 ·m ^–2。基于一系列表征，发现将Ce掺杂到MnO _2中可以增加氧空位的浓度，从而形成丰富的活性表面氧，并有利于晶格氧的迁移，这是CMBO催化性能大大提高的主要原因。这项工作表明，通过元素掺杂增加氧空位可作为一种简便有效的方法来增强过渡金属氧化物的催化性能。