Boosting Plasmonic Hot Electron Utilization for Visible-Light Photocatalysis Using Polarized Ag-TiO
            <sub>2</sub>
            Nanoparticles

Lü, Yonglong; Yu, Linfeng; Wang, Ying; Zhang, Cancan; Gao, Yangxuan; Wang, Teng; Xie, Wei

doi:10.31635/ccschem.022.202202296

Cited by 7 publications

(8 citation statements)

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“…While the as-prepared supraballs after gold deposition showed a limited activity (Figures S31, S32, and S33b), introduction of Ag + adsorbates significantly promoted the photoconversions (Figure S33a). This phenomenon was consistent with previous observations. − Ag + can serve as an electron-sacrificing agent to enhance the reactivity of hot holes by avoiding electron–hole recombination. On the other hand, Ag + can be a precursor to AgO that plays important roles in plasmon-mediated catalysis.…”

Section: Resultssupporting

confidence: 93%

DNA-Condensed Plasmonic Supraballs Transparent to Molecules

Chen,

Wang,

Deng

2023

Langmuir

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Section: Resultssupporting

confidence: 93%

DNA-Condensed Plasmonic Supraballs Transparent to Molecules

Chen,

Wang,

Deng

2023

Langmuir

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“…Such hot carriers possessing excess energy are transferred to the suitable catalytic site on the metal surface and then sequentially access two redox conversions (hot-electron-driven reduction and hot-hole-driven oxidation) under mild conditions. 10 Successful examples are plasmoninduced CO 2 reduction, 11 H 2 dissociation, 12 NH 3 oxidation, 13 and organic transformations 14 using plasmonic photocatalysts. A prominent example in organic transformations is plasmonic multielectron reactions between 4-nitrothiophenol (4-NTP), 4,4′-dimercaptoazobenzene (4,4′-DMAB), and 4-aminothiophenol (4-ATP).…”

Section: ■ Introductionmentioning

confidence: 99%

“…As their most prominent feature, the metallic NPs have strong interactions with visible light to generate coherent oscillations of free electrons within the NPs, which is called localized surface plasmon resonance (LSPR). , Via a nonradiative decay channel, excited surface plasmons in the metallic NPs would decay into energetic hot carriers (electron–hole pairs), where the high energy electrons are above the Fermi Level, while the hot holes are below it. Such hot carriers possessing excess energy are transferred to the suitable catalytic site on the metal surface and then sequentially access two redox conversions (hot-electron-driven reduction and hot-hole-driven oxidation) under mild conditions . Successful examples are plasmon-induced CO 2 reduction, H 2 dissociation, NH 3 oxidation, and organic transformations using plasmonic photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Hot-Electron-Driven Interfacial Chemistry Using Non-Noble Plasmonic Cu under Visible-Light Irradiation

Li,

Zhang,

et al. 2023

ACS Photonics

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Plasmon-excitation-driven hot electrons have been demonstrated to initiate chemical transformations when exposed to visible light. Nevertheless, achieving six-electron plasmon photocatalysis remains both rare and challenging due to the inability to maintain the persistent utilization of hot electrons. Moreover, plasmonic photocatalysts predominantly rely on noble metal nanomaterials, such as gold (Au) and silver (Ag) nanostructures. In this study, we explore the plasmonic catalysis of six-electron chemistry utilizing non-noble copper (Cu) nanoparticles under visible-light irradiation. Intriguingly, our findings reveal that in the absence of chemical reducing agents, cost-effective Cu nanoparticles can effectively catalyze the plasmonic conversion of 4-nitrothiophenol to 4-aminothiophenola transformation that remains unattainable for noble Au and Ag nanoparticles under identical conditions. Drawing upon the insights gleaned from in situ surface-enhanced Raman spectroscopy, we postulate that interfacial water (H2O) molecules compensate for the energetic hot holes generated on the plasmonic Cu surface, thereby furnishing an adequate supply of hot electrons required to activate the six-electron photocatalytic reaction. This research showcases the feasibility of multielectron photocatalysis chemistry employing earth-abundant Cu nanoparticles, thereby presenting promising opportunities for efficient solar-to-chemical energy conversion.

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“…As well, Ag + could interact with photogenerated reactive oxygen species (ROS) to form Ag 2 O layers on AuNPs, which could then get into a photocatalytic cycle. 87,89,[91][92][93]97 This result also helped us understand the improved photo-oxidation activity of Ag + -soldered AuNP dimers (Figure S16) over the H 2 O 2derived ones. We emphasize that the AuNP dimers did not aggregate or dissociate after the SERS and catalytic tests (Figure S17), which guaranteed the reliability of the SERS data.…”

Section: Raman-enhancing and Catalytic Activities Of The Surface-clea...mentioning

confidence: 96%

Assembly and Healing: Capacitive and Conductive Plasmonic Interfacing via a Unified and Clean Wet Chemistry Route

Ye,

Song,

et al. 2023

J. Am. Chem. Soc.

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Solution-based nanoparticle assembly represents a highly promising way to build functional metastructures based on a wealth of synthetic nanomaterial building blocks with well-controlled morphology and crystallinity. In particular, the involvement of DNA molecular programming in these bottom-up processes gradually helps the ambitious goal of customizable chemical nanofabrication. However, a fundamental challenge is to realize strong interunit coupling in an assembly toward emerging functions and applications. Herein, we present a unified and clean strategy to address this critical issue based on a H2O2-redox-driven “assembly and healing” process. This facile solution route is able to realize both capacitively coupled and conductively bridged colloidal boundaries, simply switchable by the reaction temperature, toward bottom-up nanoplasmonic engineering. In particular, such a “green” process does not cause surface contamination of nanoparticles by exogenous active metal ions or strongly passivating ligands, which, if it occurs, could obscure the intrinsic properties of as-formed structures. Accordingly, previously raised questions regarding the activities of strongly coupled plasmonic structures are clarified. The reported process is adaptable to DNA nanotechnology, offering molecular programmability of interparticle charge conductance. This work represents a new generation of methods to make strongly coupled nanoassemblies, offering great opportunities for functional colloidal technology and even metal self-healing.

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Boosting Plasmonic Hot Electron Utilization for Visible-Light Photocatalysis Using Polarized Ag-TiO ₂ Nanoparticles

Cited by 7 publications

References 0 publications

DNA-Condensed Plasmonic Supraballs Transparent to Molecules

DNA-Condensed Plasmonic Supraballs Transparent to Molecules

Hot-Electron-Driven Interfacial Chemistry Using Non-Noble Plasmonic Cu under Visible-Light Irradiation

Assembly and Healing: Capacitive and Conductive Plasmonic Interfacing via a Unified and Clean Wet Chemistry Route

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Boosting Plasmonic Hot Electron Utilization for Visible-Light Photocatalysis Using Polarized Ag-TiO 2 Nanoparticles

Cited by 7 publications

References 0 publications

DNA-Condensed Plasmonic Supraballs Transparent to Molecules

DNA-Condensed Plasmonic Supraballs Transparent to Molecules

Hot-Electron-Driven Interfacial Chemistry Using Non-Noble Plasmonic Cu under Visible-Light Irradiation

Assembly and Healing: Capacitive and Conductive Plasmonic Interfacing via a Unified and Clean Wet Chemistry Route

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Boosting Plasmonic Hot Electron Utilization for Visible-Light Photocatalysis Using Polarized Ag-TiO ₂ Nanoparticles