Metal doping in cerium metal-organic frameworks for visible-response water splitting photocatalysts
Journal Article
·
· Journal of Chemical Physics
- Univ. of Minnesota, Minneapolis, MN (United States). Minnesota Supercomputing Inst., Chemical Theory Center, Dept. of Chemistry; Nanoporous Materials Genome Center
- Univ. of Minnesota, Minneapolis, MN (United States). Minnesota Supercomputing Inst., Chemical Theory Center, Dept. of Chemistry
Cerium metal-organic frameworks (MOFs) show great promise for photocatalytic water splitting as they have low-lying unoccupied 4f orbitals with energies lower than the unoccupied linker orbitals to drive the ligand-to-metal charge transfer (LMCT) of the photo- generated electron at the linker to separate the photo-excited charges. Nevertheless, the large and negative LMCT energies of Ce-MOFs are often accompanied by high photon-absorption energies, which then limits the application of Ce-MOFs as visible-light-driven water splitting photocatalysts. In this work, we propose that metal (Zr or Ti) doping can raise the very negative LMCT energies of Ce-MOFs, consequently leading to the decrease of the absorption energy and promoting the response of Ce-MOFs to visible light. By functionalizing the linker of the mixed-metal MOFs, we found two possible visible-response photocatalysts for water splitting using a single photocatalyst.
- Research Organization:
- Univ. of Minnesota, Minneapolis, MN (United States). Nanoporous Materials Genome Center
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division
- Grant/Contract Number:
- SC0008688
- OSTI ID:
- 1507012
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 4 Vol. 150; ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Computational Studies of Photocatalysis with Metal–Organic Frameworks
|
journal | September 2019 |
Mixed-metal metal–organic frameworks
|
journal | January 2019 |
Cerium-based UiO-66 metal–organic frameworks explored as efficient redox catalysts: titanium incorporation and generation of abundant oxygen vacancies
|
journal | January 2019 |
Special Topic on Interfacial Electrochemistry and Photo(electro)catalysis
|
journal | January 2019 |
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