Boosting CO Catalytic Oxidation Performance via Highly Dispersed Copper Atomic Clusters: Regulated Electron Interaction and Reaction Pathways

• DOI: 10.1021/acs.est.2c07687
• Publication Date: 2023-02-08T12:55:49Z
• Authors: Deli Chen; Ziang Su; Wenzhe Si; Yakun Qu; Xiaoguang Zhao; Hao Liu; Yu Yang; Yu Wang; Yue Peng; Jianjun Chen; Junhua Li
• Keywords: Oxidation state; Noble metal; Bimetallic strip

Copper-loaded ceria (Cu/CeO2) catalysts have become promising for the catalytic oxidation of industrial CO emissions. Since their superior redox property mainly arises from synergistic effect between Cu and CeO2 support, dispersion state species may dominate performance Cu/CeO2 catalysts: extremely high or low dispersity is disadvantageous performance. The nanoparticle usually present few contact sites, while single-atom tend to be passivated due relatively single valence state. To achieve a suitable state, we synthesized catalyst with atomic clusters, realizing exposure unit activity simultaneously via favorable electron interaction an anchoring effect. reaches 90% conversion at 130 °C, comparable noble-metal catalysts. According combined in situ spectroscopy density functional theory calculations, cluster results joint efforts effective adsorption electrophilic spillover phenomenon, efficient bicarbonate pathway triggered by hydroxyl. By providing uncovering mechanism Cu-Ce dual-active our work enlighten future research on gaseous pollutant removal.