Journal
CHEMCATCHEM
Volume 13, Issue 10, Pages 2434-2443Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.202100256
Keywords
Metal Oxides; Ceria; Porous Materials; Ball Milling; CO oxidation
Categories
Funding
- National Natural Science Foundation of China [21776174]
- Shanghai Rising-Star Program [20QA1405200]
- Shanghai Jiao Tong University Scientific and Technological Innovation Funds [2019QYB06]
- National Key R D Plan [2020YFB0606400]
- Zhejiang XinAn Chemical Group
- Inner Mongolia ERDOS Group
Ask authors/readers for more resources
Transition metal-doped CeO2 prepared through mechanochemical redox chemistry exhibits higher surface area compared to traditional methods, leading to excellent catalytic activity and stability in CO oxidation due to well dispersed heteroatoms and high porosity. DFT calculations indicate that Mn and Cu dopants facilitate electron transfer and oxygen releasing in the reaction mechanism.
Transition metal-doped CeO2 (MCeOx) is of great importance in industrial catalysis. However, current synthetic methods often result in the separation of MOx phases, which significantly decreases their catalytic activity. Toward this end, the chemistry of mechanochemical redox was introduced to prepare Ce1-xMnxO2-delta catalyst. The redox behavior between MnO4- and Ce3+ could in situ produces atomically dispersed Ce1-xMnxO2-delta solid solution without calcination. Moreover, the mechanochemical synthesis endows Ce1-xMnxO2-delta a surface area (302 m(2)/g) that is much higher than the counterparts prepared by traditional methods, such as co-precipitation method (66 m(2)/g) CTAB-assisted precipitation method (122 m(2)/g) and sol-gel method (136 m(2)/g). Importantly, the well dispersed heteroatoms and high porosity afford doped ceria excellent activity and stability during CO oxidation. The reaction mechanism was finally explored by DFT calculation, which reveals that Mn and Cu dopants facilitate electron transfer and oxygen releasing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available