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Adjacent single-atom irons boosting molecular oxygen activation on MnO₂.

ABSTRACT: Efficient molecular oxygen activation is crucial for catalytic oxidation reaction, but highly depends on the construction of active sites. In this study, we demonstrate that dual adjacent Fe atoms anchored on MnO₂ can assemble into a diatomic site, also called as MnO₂-hosted Fe dimer, which activates molecular oxygen to form an active intermediate species Fe(O = O)Fe for highly efficient CO oxidation. These adjacent single-atom Fe sites exhibit a stronger O₂ activation performance than the conventional surface oxygen vacancy activation sites. This work sheds light on molecular oxygen activation mechanisms of transition metal oxides and provides an efficient pathway to activate molecular oxygen by constructing new active sites through single atom technology.

SUBMITTER: Gu H

PROVIDER: S-EPMC8440510 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature

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Adjacent single-atom irons boosting molecular oxygen activation on MnO2.

Gu Huayu H Liu Xiao X Liu Xiufan X Ling Cancan C Wei Kai K Zhan Guangming G Guo Yanbing Y Zhang Lizhi L

Nature communications 20210914 1

Efficient molecular oxygen activation is crucial for catalytic oxidation reaction, but highly depends on the construction of active sites. In this study, we demonstrate that dual adjacent Fe atoms anchored on MnO2 can assemble into a diatomic site, also called as MnO2-hosted Fe dimer, which activates molecular oxygen to form an active intermediate species Fe(O = O)Fe for highly efficient CO oxidation. These adjacent single-atom Fe sites exhibit a stronger O2 acti ...[more]

PMID: 34521832

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