Plasmonic Au nanoclusters dispersed in nitrogen-doped graphene as a robust photocatalyst for light-to-hydrogen conversion
- Authors
- Van Dao, Dung; Cipriano, Luis A.; Di Liberto, Giovanni; Nguyen, Thuy T. D.; Ki, Sang-Woo; Son, Hoki; Kim, Gyu-Cheol; Lee, Kang Hyun; Yang, Jin-Kyu; Yu, Yeon-Tae; Pacchioni, Gianfranco; Lee, In-Hwan
- Issue Date
- 19-10월-2021
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v.9, no.40, pp.22810 - 22819
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY A
- Volume
- 9
- Number
- 40
- Start Page
- 22810
- End Page
- 22819
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/136030
- DOI
- 10.1039/d1ta05445g
- ISSN
- 2050-7488
- Abstract
- Supported plasmonic Au nanoclusters (NCs) consisting of a few tens of atoms can potentially offer great advantages for the light-driven hydrogen evolution reaction (HER). Here, we report on the synthesis of well-dispersed and stable plasmonic Au NCs of 0.5-1.0 nm size on nitrogen-doped high surface area graphene (N-Gr) via freeze-drying and pyrolyzing in argon. The Au NCs/N-Gr photocatalyst exhibits under visible-light an impressive HER achievement (3.16 mu mol mg(cat)(-1) h(-1)) compared to Au single atoms/N-Gr (2.06 mu mol mg(cat)(-1) h(-1)) and Au nanoparticles (20 nm size)/N-Gr (0.92 mu mol mg(cat)(-1) h(-1)), with a maximum apparent quantum yield of 14.30%. These performances are synergistically attributed to two effects: (a) the strong surface plasmon resonance stimulated by light absorption and transferred near the surface of Au NCs, where the N-Gr conductive support can prolong the plasmon-produced hot electrons and direct the light-to-hydrogen conversion; (b) a high catalytic efficiency of Au NCs/N-Gr nanocomposites.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.