Cu–Cu2O Heterogeneous Architecture for the Enhanced CO Catalytic Oxidation. Issue 7 (11th February 2020)

• Record Type: Journal Article
• Authors: Ma, Bo; Kong, Chuncai; Lv, Jian; Zhang, Xiaojing; Yang, Sen; Yang, Tao; Yang, Zhimao
• Is Part Of: Advanced materials interfaces. Volume 7:Issue 7(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-02-11
• Subjects: CO oxidation -- composite interfaces -- cuprous oxides -- Eley–Rideal mechanism -- oxygen dissociation; Materials science -- Periodicals; 620.11
• DOI: 10.1002/admi.201901643
• Languages: English
• ISSNs: 2196-7350

Abstract

Abstract: Heterogeneous architecture of Cu2 O‐based composite has exhibited beneficial effort in the CO oxidation, due to the low cost and the multiple oxidation states. In this work, Cu–Cu2 O heterogeneous particles (HPs) comprising uniformly distributed Cu nanoparticles anchored on the Cu2 O surface are synthesized by in situ reduction reaction. Comparing with the pure Cu2 O particles, Cu–Cu2 O HPs exhibit enhanced and stable catalytic performance during CO oxidation. Moreover, both the transformation of interface and the role of loaded Cu nanoparticle at a molecular level are investigated to analyze the promotion, suggesting that the surface of Cu–Cu2 O HPs can be spontaneously oxidized to a composite interface during the CO oxidation. The density functional theory (DFT) simulations indicate that due to loaded Cu nanoparticles, the heterogeneous architecture promotes the catalytic reaction under both the Eley–Rideal mechanism as well as Langmuir–Hinshelwood mechanism. As a result, the composite interface and loaded Cu nanoparticles together play the synergistic effect of enhanced CO oxidation. Abstract : Cu–Cu2 O heterogeneous crystals are synthesized by in situ reduction reaction. The heterogeneous architecture enhances CO oxidation performance. The composite interface after a cycle could strongly promote the CO oxidation. Loaded Cu nanoparticles promote the key step of O2 dissociation followed by the Eley–Rideal mechanism as well as Langmuir–Hinshelwood (LH) mechanism.