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Title: Catalyst-on-hotspot nanoarchitecture: plasmonic focusing of light onto co-photocatalyst for efficient light-to-chemical transformation
Authors: Chong, Carice
Boong, Siew Kheng
Raja Mogan, Tharishinny
Lee, Jinn-Kye
Ang, Zhi Zhong
Li, Haitao
Lee, Hiang Kwee
Keywords: Chemistry
Issue Date: 2024
Source: Chong, C., Boong, S. K., Raja Mogan, T., Lee, J., Ang, Z. Z., Li, H. & Lee, H. K. (2024). Catalyst-on-hotspot nanoarchitecture: plasmonic focusing of light onto co-photocatalyst for efficient light-to-chemical transformation. Small.
Project: RS13/20 
Journal: Small 
Abstract: Plasmon-mediated catalysis utilizing hybrid photocatalytic ensembles promises effective light-to-chemical transformation, but current approaches suffer from weak electromagnetic field enhancements from polycrystalline and isotropic plasmonic nanoparticles as well as poor utilization of precious co-catalyst. Here, efficient plasmon-mediated catalysis is achieved by introducing a unique catalyst-on-hotspot nanoarchitecture obtained through the strategic positioning of co-photocatalyst onto plasmonic hotspots to concentrate light energy directly at the point-of-reaction. Using environmental remediation as a proof-of-concept application, the catalyst-on-hotspot design (edge-AgOcta@Cu2 O) enhances photocatalytic advanced oxidation processes to achieve superior organic-pollutant degradation at ≈81% albeit having lesser Cu2 O co-photocatalyst than the fully deposited design (full-AgOcta@Cu2 O). Mass-normalized rate constants of edge-AgOcta@Cu2 O reveal up to 20-fold and 3-fold more efficient utilization of Cu2 O and Ag nanoparticles, respectively, compared to full-AgOcta@Cu2 O and standalone catalysts. Moreover, this design also exhibits catalytic performance >4-fold better than emerging hybrid photocatalytic platforms. Mechanistic studies unveil that the light-concentrating effect facilitated by the dense electromagnetic hotspots is crucial to promote the generation and utilization of energetic photocarriers for enhanced catalysis. By enabling the plasmonic focusing of light onto co-photocatalyst at the single-particle level, the unprecedented design offers valuable insights in enhancing light-driven chemical reactions and realizing efficient energy/catalyst utilizations for diverse chemical, environmental, and energy applications.
ISSN: 1613-6810
DOI: 10.1002/smll.202309983
Schools: School of Chemistry, Chemical Engineering and Biotechnology 
Organisations: Institute of Materials Research and Engineering, A*STAR 
Rights: © 2024 Wiley-VCH GmbH. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at
Fulltext Permission: embargo_20250111
Fulltext Availability: With Fulltext
Appears in Collections:CCEB Journal Articles

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