Abstract
Plasmonic metal@semiconductor core–shell nanoparticles (CSNPs) are considered as promising candidates for artificial photosynthesis. Herein, Au@CeO2 CSNPs are hydrothermally fabricated for photocatalytic hydrogen evolution reaction (HER). CSNPs deliver superior HER performance compared to free CeO2. In particular, Au@CeO2-18 model (shell thickness of 18 nm) produces an HER rate of 4.05 μmol mg–1 h–1, which is ∼10 times higher than that of pure CeO2 (0.40 μmol mg–1 h–1) under visible-light. Additionally, Au@CeO2-18 photocatalyst demonstrates long-term stability after five repetitive runs, at which point it only loses approximately 5% of the activity, while core-free CeO2 decreases by 37.5 %. Such improvements are attributed to the electronic interactions between Au and CeO2, which not only enriches Ce3+ active sites to narrow bandgap of ceria toward visible, but also increases the affinity for hydrogen ions on the CSNPs surface. Moreover, localized surface plasmon resonance is light-excited and decays to efficiently produce hot-carrier to drive catalytic reactions.
Original language | English |
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Article number | 119947 |
Journal | Applied Catalysis B: Environmental |
Volume | 286 |
DOIs | |
Publication status | Published - 2021 Jun 5 |
Bibliographical note
Funding Information:This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) ( NRF-2020R1A2B5B03001603 , 2020R1A2C1014498 ), and BK21-FOUR program of the MOE and NRF of Korea . Computing time was provided by the National Institute of Supercomputing and Network/Korea Institute of Science and Technology Information (KSC-2019-CRE-0210).
Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2020R1A2B5B03001603, 2020R1A2C1014498), and BK21-FOUR program of the MOE and NRF of Korea. Computing time was provided by the National Institute of Supercomputing and Network/Korea Institute of Science and Technology Information (KSC-2019-CRE-0210).
Publisher Copyright:
© 2021 Elsevier B.V.
Keywords
- Au@CeOcore–shell
- Hot-carrier
- Hydrogen production
- Photocatalyst
- Plasmonic
ASJC Scopus subject areas
- Catalysis
- Environmental Science(all)
- Process Chemistry and Technology