Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 9, Issue 40, Pages -Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ta05445g
Keywords
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Funding
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [NRF-2020R1A2B5B03001603, 2020R1A2C1014498, 2021R1A2C2008447]
- Italian Ministry of University and Research (MIUR) through the PRIN Project [20179337R7]
- Italian Ministry of University and Research (MIUR) through the Dipartimenti di Eccellenza-2017 Materials for Energy
- National Research Foundation of Korea [2020R1A2C1014498, 2021R1A2C2008447] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The synthesis of well-dispersed and stable plasmonic Au nanoclusters on nitrogen-doped high surface area graphene via freeze-drying and pyrolyzing in argon leads to an impressive hydrogen evolution reaction performance under visible-light, with a maximum apparent quantum yield of 14.30%.
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.
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