Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 6, Pages 2092-2099Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201504588
Keywords
cerium oxide; density functional calculations; single-atom catalysts; water adsorption; water dissociation
Categories
Funding
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences [Y290011011]
- National Natural Science Foundation of China [21273268, 11574340]
- Hundred People Project from Chinese Academy of Sciences
- Pu-jiang Rencai Project from the Science and Technology Commission of Shanghai Municipality [13J1410400]
Ask authors/readers for more resources
Single-atom catalysts have attracted wide attention owing to their extremely high atom efficiency and activities. In this paper, we applied density functional theory with the inclusion of the on-site Coulomb interaction (DFT+U) to investigate water adsorption and dissociation on clean CeO2(111) surfaces and single transition metal atoms (STMAs) adsorbed on the CeO2(111) surface. It is found that the most stable water configuration is molecular adsorption on the clean CeO2(111) surface and dissociative adsorption on STMA/CeO2(111) surfaces, respectively. In addition, our results indicate that the more the electrons that transfer from STMA to the ceria substrate, the stronger the binding energies between the STMA and ceria surfaces. A linear relationship is identified between the water dissociation barriers and the d band centers of STMA, known as the generalized BrOnsted-Evans-Polanyi principle. By combining the oxygen spillovers, single-atom dispersion stabilities, and water dissociation barriers, Zn, Cr, and V are identified as potential candidates for the future design of ceria-supported single-atom catalysts for reactions in which the dissociation of water plays an important role, such as the water-gas shift reaction.
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