Send to

Choose Destination
ACS Appl Mater Interfaces. 2018 Nov 7;10(44):38134-38140. doi: 10.1021/acsami.8b15585. Epub 2018 Oct 24.

In Situ Formation of Isolated Bimetallic PtCe Sites of Single-Dispersed Pt on CeO2 for Low-Temperature CO Oxidation.

Li J1,2, Tang Y3,4, Ma Y2, Zhang Z2, Tao FF3,4, Qu Y2.

Author information

Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, College of Chemistry and Chemical Engineering , Liaocheng University , Liaocheng 252059 , China.
Center for Applied Chemical Research, Frontier Institute of Science and Technology and Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology , Xi'an Jiaotong University , Xi'an 710049 , China.
State Key Laboratory of Photocatalysis on Energy and Environment and College of Chemistry , Fuzhou University , Fuzhou 350116 , China.
Department of Chemical and Petroleum Engineering , University of Kansas , Lawrence , Kansas 66047 , United States.


Identification of the chemical states of catalytic sites is critical for an atomic-level understanding of catalytic mechanisms. Herein, hydrogen thermal pretreatment of the Pt single atoms on porous nanorods of CeO2 (Pt1/ PN-CeO2) induced the formation of isolated bimetallic PtCe sites as a new type of active center for CO oxidation. The evolutions of Pt1/ PN-CeO2 catalysts during the hydrogen pretreatment and CO oxidation were examined by various in situ techniques including infrared, ambient-pressure X-ray photoelectron and X-ray absorption spectroscopy. The experimental results demonstrate that these bimetallic sites can be partially preserved or reoxidized into Pt-O-Ce with a low coordination number with oxygen under realistic conditions, leading to the appropriate CO adsorption and activating the efficient activity of Pt1/ PN-CeO2 for CO oxidation at low temperature.


CO oxidation; Pt single atoms; bimetallic PtCe sites; in situ formation; porous nanorods of CeO2


Supplemental Content

Full text links

Icon for American Chemical Society
Loading ...
Support Center