Catalyst‐On‐Hotspot Nanoarchitecture: Plasmonic Focusing of Light onto Co‐Photocatalyst for Efficient Light‐To‐Chemical Transformation

Author:

Chong Carice1,Boong Siew Kheng1,Raja Mogan Tharishinny1,Lee Jinn‐Kye1,Ang Zhi Zhong1,Li Haitao2,Lee Hiang Kwee134

Affiliation:

1. Division of Chemistry and Biological Chemistry School of Chemistry Chemical Engineering, and Biotechnology Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore

2. School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 P. R. China

3. Institute of Materials Research and Engineering The Agency for Science, Technology and Research (A∗STAR) 2 Fusionopolis Way, #08‐03, Innovis Singapore 138634 Singapore

4. Centre for Hydrogen Innovations National University of Singapore E8, 1 Engineering drive 3 Singapore 117580 Singapore

Abstract

AbstractPlasmon‐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@Cu2O) enhances photocatalytic advanced oxidation processes to achieve superior organic‐pollutant degradation at ≈81% albeit having lesser Cu2O co‐photocatalyst than the fully deposited design (full‐AgOcta@Cu2O). Mass‐normalized rate constants of edge‐AgOcta@Cu2O reveal up to 20‐fold and 3‐fold more efficient utilization of Cu2O and Ag nanoparticles, respectively, compared to full‐AgOcta@Cu2O 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.

Publisher

Wiley

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Effect of crystal facets in plasmonic catalysis;Nature Communications;2024-05-09

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