Probing the Atomistic Reaction Pathways in CuO/C Catalysts.
Nano Lett
; 23(20): 9367-9374, 2023 Oct 25.
Article
em En
| MEDLINE
| ID: mdl-37807279
ABSTRACT
CuOx/C catalysts have been used in the selective catalytic reduction of NOx because of the exceptional low-temperature denitration (de-NOx) activity. A fundamental understanding of the reaction between CuO and C is critical for controlling the component of CuOx/C and thus optimizing the catalytic performance. In this study, a transmission electron microscope equipped with an in situ heating device was utilized to investigate the atomic-scale reaction between CuO and C. We report two reaction mechanisms relying on the volume ratio between C and CuO (1) The reduction from CuO to Cu2O (when the ratio is <â¯â¼31%); (2) the reduction of CuO into polycrystalline Cu (when the ratio is >â¯â¼34%). The atomistic reduction pathway can be well interpreted by considering the diffusion of O vacancy through the first-principle calculations. The atomic-scale exploration of CuO/C offers ample prospects for the design of industrial de-NOx catalysts in the future.
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MEDLINE
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En
Ano de publicação:
2023
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Article