Investigation of the Redispersion of Pt Nanoparticles on Polyhedral Ceria Nanoparticles.
Redispersion of platinum nanoparticles (Pt NPs) on ceria is an important route for catalyst regeneration and antisintering. Here, we investigate the redispersion of Pt on ceria nanoparticles with defined surface planes including cubes ({100}) and octahedra ({111}). It is observed that Pt redispersion takes place only on ceria cubes in an alternating oxidation and reduction atmosphere. A quicker alternation rate is beneficial for such redispersion. On the basis of our experimental results and understandings toward this process, we proposed that the redispersion takes place at the moment of alternation of oxidation and reduction.
†State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China.|‡University of Chinese Academy of Sciences, Beijing 100039, China.
Tianxiao
T
Wu
†State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China.
Xiqiang
X
Pan
†State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China.
Yibo
Y
Zhang
†State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China.|‡University of Chinese Academy of Sciences, Beijing 100039, China.
Zhenzhen
Z
Miao
†State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China.|‡University of Chinese Academy of Sciences, Beijing 100039, China.
Bin
B
Zhang
†State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China.|‡University of Chinese Academy of Sciences, Beijing 100039, China.
Jingwei
J
Li
†State Key Laboratory of Rare Earth Resource Utilization, Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences, Changchun, Jilin 130022, China.
Xiangguang
X
Yang
aggregation; stability; supported catalysts; surface chemistry; treatment