TY - JOUR
T1 - Constructing hierarchical interfaces
T2 - TiO2-supported PtFe-FeOx nanowires for room temperature CO oxidation
AU - Zhu, Huiyuan
AU - Wu, Zili
AU - Su, Dong
AU - Veith, Gabriel M.
AU - Lu, Hanfeng
AU - Zhang, Pengfei
AU - Chai, Song Hai
AU - Dai, Sheng
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/8/19
Y1 - 2015/8/19
N2 - In this communication, we report a facile approach to constructing catalytic active hierarchical interfaces in one-dimensional (1D) nanostructure, exemplified by the synthesis of TiO2-supported PtFe-FeOx nanowires (NWs). The hierarchical interface, constituting atomic level interactions between PtFe and FeOx within each NW and the interactions between NWs and support (TiO2), enables CO oxidation with 100% conversion at room temperature. We identify the role of the two interfaces by probing the CO oxidation reaction with isotopic labeling experiments. Both the oxygen atoms (Os) in FeOx and TiO2 participate in the initial CO oxidation, facilitating the reaction through a redox pathway. Moreover, the intact 1D structure leads to the high stability of the catalyst. After 30 h in the reaction stream, the PtFe-FeOx/TiO2 catalyst exhibits no activity decay. Our results provide a general approach and new insights into the construction of hierarchical interfaces for advanced catalysis.
AB - In this communication, we report a facile approach to constructing catalytic active hierarchical interfaces in one-dimensional (1D) nanostructure, exemplified by the synthesis of TiO2-supported PtFe-FeOx nanowires (NWs). The hierarchical interface, constituting atomic level interactions between PtFe and FeOx within each NW and the interactions between NWs and support (TiO2), enables CO oxidation with 100% conversion at room temperature. We identify the role of the two interfaces by probing the CO oxidation reaction with isotopic labeling experiments. Both the oxygen atoms (Os) in FeOx and TiO2 participate in the initial CO oxidation, facilitating the reaction through a redox pathway. Moreover, the intact 1D structure leads to the high stability of the catalyst. After 30 h in the reaction stream, the PtFe-FeOx/TiO2 catalyst exhibits no activity decay. Our results provide a general approach and new insights into the construction of hierarchical interfaces for advanced catalysis.
UR - http://www.scopus.com/inward/record.url?scp=84939832990&partnerID=8YFLogxK
U2 - 10.1021/jacs.5b07011
DO - 10.1021/jacs.5b07011
M3 - Article
AN - SCOPUS:84939832990
SN - 0002-7863
VL - 137
SP - 10156
EP - 10159
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 32
ER -