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Sharma G, Verma R, Masuda S, Badawy KM, Singh N, Tsukuda T, Polshettiwar V. Pt-doped Ru nanoparticles loaded on 'black gold' plasmonic nanoreactors as air stable reduction catalysts. Nat Commun 2024; 15:713. [PMID: 38267414 PMCID: PMC10808126 DOI: 10.1038/s41467-024-44954-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 01/10/2024] [Indexed: 01/26/2024] Open
Abstract
This study introduces a plasmonic reduction catalyst, stable only in the presence of air, achieved by integrating Pt-doped Ru nanoparticles on black gold. This innovative black gold/RuPt catalyst showcases good efficiency in acetylene semi-hydrogenation, attaining over 90% selectivity with an ethene production rate of 320 mmol g-1 h-1. Its stability, evident in 100 h of operation with continuous air flow, is attributed to the synergy of co-existing metal oxide and metal phases. The catalyst's stability is further enhanced by plasmon-mediated concurrent reduction and oxidation of the active sites. Finite-difference time-domain simulations reveal a five-fold electric field intensification near the RuPt nanoparticles, crucial for activating acetylene and hydrogen. Kinetic isotope effect analysis indicates the contribution from the plasmonic non-thermal effects along with the photothermal. Spectroscopic and in-situ Fourier transform infrared studies, combined with quantum chemical calculations, elucidate the molecular reaction mechanism, emphasizing the cooperative interaction between Ru and Pt in optimizing ethene production and selectivity.
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Affiliation(s)
- Gunjan Sharma
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Mumbai, 40005, India
| | - Rishi Verma
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Mumbai, 40005, India
| | - Shinya Masuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo, 113-0033, Japan
| | | | - Nirpendra Singh
- Department of Physics, Khalifa University, Abu Dhabi, 127788, United Arab Emirates
| | - Tatsuya Tsukuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo, 113-0033, Japan.
| | - Vivek Polshettiwar
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Mumbai, 40005, India.
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Wang Y, Wang Y, Aravind I, Cai Z, Shen L, Zhang B, Wang B, Chen J, Zhao B, Shi H, Dawlaty JM, Cronin SB. In Situ Investigation of Ultrafast Dynamics of Hot Electron-Driven Photocatalysis in Plasmon-Resonant Grating Structures. J Am Chem Soc 2022; 144:3517-3526. [PMID: 35188777 DOI: 10.1021/jacs.1c12069] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Understanding the relaxation and injection dynamics of hot electrons is crucial to utilizing them in photocatalytic applications. While most studies have focused on hot carrier dynamics at metal/semiconductor interfaces, we study the in situ dynamics of direct hot electron injection from metal to adsorbates. Here, we report a hot electron-driven hydrogen evolution reaction (HER) by exciting the localized surface plasmon resonance (LSPR) in Au grating photoelectrodes. In situ ultrafast transient absorption (TA) measurements show a depletion peak resulting from hot electrons. When the sample is immersed in solution under -1 V applied potential, the extracted electron-phonon interaction time decreases from 0.94 to 0.67 ps because of additional energy dissipation channels. The LSPR TA signal is redshifted with delay time because of charge transfer and subsequent change in the dielectric constant of nearby solution. Plateau-like photocurrent peaks appear when exciting a 266 nm linewidth grating with p-polarized (on resonance) light, accompanied by a similar profile in the measured absorptance. Double peaks in the photocurrent measurement are observed when irradiating a 300 nm linewidth grating. The enhancement factor (i.e., reaction rate) is 15.6× between p-polarized and s-polarized light for the 300 nm linewidth grating and 4.4× for the 266 nm linewidth grating. Finite-difference time domain (FDTD) simulations show two resonant modes for both grating structures, corresponding to dipolar LSPR modes at the metal/fused silica and metal/water interfaces. To our knowledge, this is the first work in which LSPR-induced hot electron-driven photochemistry and in situ photoexcited carrier dynamics are studied on the same plasmon resonance structure with and without adsorbates.
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Affiliation(s)
- Yu Wang
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, United States
| | - Yi Wang
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Indu Aravind
- Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089, United States
| | - Zhi Cai
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, United States
| | - Lang Shen
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, United States
| | - Boxin Zhang
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, United States
| | - Bo Wang
- Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089, United States
| | - Jihan Chen
- Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, United States
| | - Bofan Zhao
- Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, United States
| | - Haotian Shi
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Jahan M Dawlaty
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Stephen B Cronin
- Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, United States.,Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States.,Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089, United States
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Wang Y, Aravind I, Cai Z, Shen L, Gibson GN, Chen J, Wang B, Shi H, Song B, Guignon E, Cady NC, Page WD, Pilar A, Cronin SB. Hot Electron Driven Photocatalysis on Plasmon-Resonant Grating Nanostructures. ACS APPLIED MATERIALS & INTERFACES 2020; 12:17459-17465. [PMID: 32212673 DOI: 10.1021/acsami.0c00066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We demonstrate the hot electron injection of photoexcited carriers in an Ag-based plasmon resonant grating structure. By varying the incident angle of irradiation, sharp dips are observed in the reflectance with p-polarized light (electric field perpendicular to grating lines) when there is wavevector matching between the incident light and the plasmon resonant modes of the grating and no angle dependence is observed with s-polarized light. This configuration enables us to compare photoelectrochemical current produced by plasmon resonant excitation with that of bulk metal interband absorption simply by rotating the polarization of the incident light while keeping all other parameters of the measurement fixed. With 633 nm light, we observed a 12-fold enhancement in the photocurrent (i.e., reaction rate) between resonant and nonresonant polarizations at incident angles of ±7.6° from normal. At 785 nm irradiation, we observed similar resonant profiles to those obtained with 633 nm wavelength light but with a 44-fold enhancement factor. Using 532 nm light, we observed two resonant peaks (with approximately 10× enhancement) in the photocurrent at 19.4° and 28.0° incident angles, each corresponding to higher order modes in the grating with more nodes per period. The lower enhancement factors observed at shorter wavelengths are attributed to interband transitions, which provide a damping mechanism for the plasmon resonance. Finite difference time domain (FDTD) simulations of these grating structures confirm the resonant profiles observed in the angle-dependent spectra of these gratings and provide a detailed picture of the electric field profiles on and off resonance.
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Affiliation(s)
| | | | | | | | - George N Gibson
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, United States
- Ciencia Inc., East Hartford, Connecticut 06108, United States
| | | | | | | | | | - Ernest Guignon
- Ciencia Inc., East Hartford, Connecticut 06108, United States
| | - Nathaniel C Cady
- Colleges of Nanoscale Science & Engineering, SUNY Polytechnic Institute, Albany, New York 12203, United States
| | - William D Page
- Ciencia Inc., East Hartford, Connecticut 06108, United States
| | - Arturo Pilar
- Ciencia Inc., East Hartford, Connecticut 06108, United States
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