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Plasmonically driven photocatalytic hydrogen evolution activity of a Pt-functionalized Au@CeO2 core-shell catalyst under visible light

Authors
Van Dao, DungNguyen, Thuy T. D.Le, Thanh DucKim, Seung-HyeonYang, Jin-KyuLee, In-HwanYu, Yeon-Tae
Issue Date
28-4월-2020
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.8, no.16, pp.7687 - 7694
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF MATERIALS CHEMISTRY A
Volume
8
Number
16
Start Page
7687
End Page
7694
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/56273
DOI
10.1039/d0ta00811g
ISSN
2050-7488
Abstract
A ternary hybrid photocatalyst consisting of Au@CeO2 core-shell nanostructures coated with ultralow Pt-functionalized surface contents (Au@CeO2-Pt) was synthesized using a facile hydrothermal method. The Pt-decorated Au@CeO2 core-shell photocatalyst had a large Brunauer-Emmett-Teller (BET) surface area (86.50 m(2) g(-1)) with an abundance of catalytically active sites. The hydrogen production rate over Au@CeO2-Pt under visible light (8.7 mu mol mg(-1) h(-1)) was much higher than that observed over binary Au@CeO2 (3.9 mu mol mg(-1) h(-1)) and pure CeO2 (0.9 mu mol mg(-1) h(-1)) catalysts. Enhancement of the hydrogen evolution reaction (HER) was attributed mainly to the surface plasmon resonance (SPR) effect of the Au cores, which was highly advantageous for light absorption and conversion. In addition, the Pt co-catalyst served as an electron sink that accepted photogenerated electrons migrating from the Au@CeO2 core-shells. This extended the lifetime of the photogenerated charge carriers and resulted in HER activity that was superior to that of the Pt-free photocatalysts. The large BET surface area of the ternary core-shell nanostructure and the presence of many catalytically active sites also enhanced the HER performance.
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공과대학 (신소재공학부)
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