journal article·2020-02-14

Photophysical Effects behind the Efficiency of Hot Electron Injection in Plasmon-Assisted Catalysis: The Joint Role of Morphology and Composition

Yoel Negrín-Montecelo, Miguel Comesaña-Hermo, Larousse Khosravi Khorashad, Ana Sousa-Castillo, Zhiming Wang, Moisés Pérez-Lorenzo, Tim Liedl, Alexander O. Govorov, Miguel A. Correa-Duarte

ACS Energy Letters· Volume 5· Issue 2
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Abstract

Plasmonic materials are intensively used to extend the photoactivity of large bandgap semiconductors into the visible light region. In this framework, the present study examines the joint role played by the morphology and composition of plasmonic nanoparticles in their photosensitizing capabilities. The critical influence of these parameters is evidenced by the effect of Au and core–shell Au@Ag nanorods on a TiO2-driven photochemical probe reaction. In this case, the use of the bimetallic composites leads to a remarkable increase in the photocatalytic activity of the semiconductor compared to that found for the monometallic Au sensitizers. The mechanism behind this observation has then been computed theoretically concluding that, in terms of hot electron injection, the contribution of the transversal modes of the Au@Ag NRs and the low damping of these nanostructures are responsible for the photocatalytic properties reported herein. The great potential of these architectures is confirmed by their notable performance toward photocatalytic hydrogen generation, rendering this approach an appealing strategy in the search for efficient solar-driven energy systems.
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Research context

OpenAlex topics: Advanced Photocatalysis Techniques · Copper-based nanomaterials and applications · Gold and Silver Nanoparticles Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physical Chemistry, Biomedical Research Center (CINBIO), Southern Galicia Institute of Health Research (IISGS), and Biomedical Research Networking Center for Mental Health (CIBERSAM), Universidade de Vigo, 36310 Vigo, Spain

Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J-A de Baïf, F-75013 Paris, France

Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, United States

Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China

Fakultät für Physik and Center for Nanoscience, Ludwig-Maximilians-Universität, Geschwister-Scholl-Platz 1, 80539 München, Germany

Funding

Ministry of Science and Technology of the People's Republic of China · Ministerio de Econom?a y Competitividad · Xunta de Galicia · Centre National de la Recherche Scientifique · National Natural Science Foundation of China · Volkswagen Foundation · Cluster of excellence e-conversion

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