hydrogen spillover
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Author(s):  
Shuai Wang ◽  
Yipin Lv ◽  
Xilong Wang ◽  
Daowei Gao ◽  
Aijun Duan ◽  
...  

A well-defined catalyst with platinum (Pt) and gold (Au) encapsulated in micropore and mesopore of micro-mesoporous zeolite (TMSN), respectively, was designed to investigate the original active sites and kinetics of semi-hydrogenation. Specifically, hydrogen molecules are dissociated on Pt nanoclusters (NCs) to form hydrogen atoms that migrate to the surfaces of TMSN zeolite and Au nanoparticles (NPs). Meanwhile, the Au NPs with inferior H dissociation capability in the mesopore can be served as the detector and controller of hydrogen spillover. The Pt NCs in micropore act as H dissociation sites while both the Au NPs and zeolite surface are identified as the semi-hydrogenation sites. Noteworthy, the Pt-Au/TMSN catalyst with double active sites exhibits higher selectivity and rate constant ratio for semi-hydrogenation than Pt/TMSN, as well as higher turnover frequency (TOF) than Au/MSN. This work creates an effective regulation strategy of hydrogen spillover for improving active sites and kinetics of semi-hydrogenation.



Author(s):  
Xiang Li ◽  
Zhikun Tong ◽  
Shuang Zhu ◽  
Qiang Deng ◽  
Shixia Chen ◽  
...  


Author(s):  
Xiao Kong ◽  
Jun xiao ◽  
Aitao Chen ◽  
Long Chen ◽  
Chao Li ◽  
...  
Keyword(s):  


2021 ◽  
pp. 117281
Author(s):  
Abhishek D. Yewale ◽  
Pranav V. Kherdekar ◽  
Divesh Bhatia


Rare Metals ◽  
2021 ◽  
Author(s):  
Ruo-Yan Miao ◽  
Xue-Xiang Li ◽  
Qian Lei ◽  
Hu Liu ◽  
Zhen-Hui Ma ◽  
...  


Author(s):  
Yukari Yamazaki ◽  
Kohsuke Mori ◽  
Yasutaka Kuwahara ◽  
Hisayoshi Kobayashi ◽  
Hiromi Yamashita








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