In situ monitoring of Suzuki-Miyaura cross-coupling reaction by using surface-enhanced Raman spectroscopy on a bifunctional Au-Pd nanocoronal film

Zhang, Cancan; Lü, Yonglong; Zhu, Aonan; Yang, Ling; Du, Xiaohui; Hu, Yunfeng; Yang, Xian; Zhang, Feng; Xie, Wei

doi:10.1016/j.cclet.2022.06.078

Cited by 10 publications

(4 citation statements)

References 46 publications

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“…The synthesized AuNPs@COF-PdNPs nanostructure was also applied to catalyze the Suzuki−Miyaura coupling reaction monitored through SERS (Figure 5a). 40 First, 4-BTP molecules were modified on the nanostructure. According to the SERS spectrum in Figure 5b (top curve), the peak at 1067 cm −1 can be attributed to the hybrid mode of the C−Br bond and benzene ring, while the peak at 1558 cm −1 belonged to the benzene ring symmetric stretching mode of 4-BTP.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Core–Shell Gold Nanoparticles@Pd-Loaded Covalent Organic Framework for In Situ Surface-Enhanced Raman Spectroscopy Monitoring of Catalytic Reactions

Huang,

Xu,

Zhu

et al. 2024

ACS Sens.

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A core−shell nanostructure of gold nanoparticles@covalent organic framework (COF) loaded with palladium nanoparticles (AuNPs@ COF-PdNPs) was designed for the rapid monitoring of catalytic reactions with surface-enhanced Raman spectroscopy (SERS). The nanostructure was prepared by coating the COF layer on AuNPs and then in situ synthesizing PdNPs within the COF shell. With the respective SERS activity and catalytic performance of the AuNP core and COF-PdNPs shell, the nanostructure can be directly used in the SERS study of the catalytic reaction processes. It was shown that the confinement effect of COF resulted in the high dispersity of PdNPs and outstanding catalytic

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Section: ■ Results and Discussionmentioning

confidence: 99%

“…The synthesized AuNPs@COF-PdNPs nanostructure was also applied to catalyze the Suzuki–Miyaura coupling reaction monitored through SERS (Figure a) . First, 4-BTP molecules were modified on the nanostructure.…”

Section: Resultsmentioning

confidence: 99%

Core–Shell Gold Nanoparticles@Pd-Loaded Covalent Organic Framework for In Situ Surface-Enhanced Raman Spectroscopy Monitoring of Catalytic Reactions

Huang,

Xu,

Zhu

et al. 2024

ACS Sens.

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“…It can be found that the peak at 1560 cm –1 (BTP) weakened as the reaction proceeded while the peaks at 1600 cm –1 (MBP) intensified. There is no peak of byproduct 4,4′-biphenyldithiol observed (details available in section IV of the Supporting Information, Figures S10–S17). − For comparison, the typical SERS spectra and contour plots employing the VSe 2– x O x @Pd sensor under 532 nm laser are displayed in Figure d,e. According to the PICT resonance theory, the charge transfer between the VSe 2– x O x @Pd and BTP would be efficiently promoted when the laser energy (E 633 = 1.96 eV) is closed to the energy gap between the Fermi level of the Pd cluster and the LUMO level of BTP (∼1.86 eV) (details available in section V of the Supporting Information, Figures S18 and S19).…”

Section: Resultsmentioning

confidence: 99%

VSe_2–xO_x@Pd Sensor for Operando Self-Monitoring of Palladium-Catalyzed Reactions

Wei

Fan

et al. 2023

JACS Au

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Operando monitoring of catalytic reaction kinetics plays a key role in investigating the reaction pathways and revealing the reaction mechanisms. Surface-enhanced Raman scattering (SERS) has been demonstrated as an innovative tool in tracking molecular dynamics in heterogeneous reactions. However, the SERS performance of most catalytic metals is inadequate. In this work, we propose hybridized VSe 2−x O x @Pd sensors to track the molecular dynamics in Pd-catalyzed reactions. Benefiting from metal−support interactions (MSI), the VSe 2−x O x @Pd realizes strong charge transfer and enriched density of states near the Fermi level, thereby strongly intensifying the photoinduced charge transfer (PICT) to the adsorbed molecules and consequently enhancing the SERS signals. The excellent SERS performance of the VSe 2−x O x @Pd offers the possibility for self-monitoring the Pd-catalyzed reaction. Taking the Suzuki−Miyaura coupling reaction as an example, operando investigations of Pd-catalyzed reactions were demonstrated on the VSe 2−x O x @Pd, and the contributions from PICT resonance were illustrated by wavelength-dependent studies. Our work demonstrates the feasibility of improved SERS performance of catalytic metals by modulating the MSI and offers a valid means to investigate the mechanisms of Pd-catalyzed reactions based on VSe 2−x O x @Pd sensors.

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“…For further study of the fresh foam, it was treated with gold nanoparticles (with a 5 nm diameter and silica coating) to enhance its spectroscopic characteristics. Then, it was characterized using surface-enhanced Raman spectroscopy. – The spectrum after treatment with gold nanoparticles shows some peaks at 340, 356, 420, 440, 470, 490, 500, 520, and 560 cm –1 , which are related to the presence of different FeNi (hydr)oxides on the surface of the fresh foam (Figure b). – A sharp peak at 440 cm –1 could be related to Ni(OH) 2 . , Thus, oxidation of an FeNi foam in air results in the formation of different FeNi (hydr)oxides on the surface (for the Raman spectra of Ni(OH) 2 , NiO(OH), and Fe 3 O 4 , see Figures S2–S4). Raman spectroscopy of the anodized foam indicates the presence of phosphate groups, – with a peak appearing at 1015 cm –1 (Figure a).…”

Section: Resultsmentioning

confidence: 99%

Unveiling the Oxygen Evolution Mechanism with FeNi (Hydr)oxide under Neutral Conditions

Akbari,

Nandy,

Chae

et al. 2023

Inorg. Chem.

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Large-scale solar-driven water splitting is a way to store energy, but it requires the development of practical and durable oxygen evolution reaction (OER) catalysts. The present paper aims to investigate the mechanism of the OER, local pH, high-valent metal ions, limitations, conversions, and details during the OER in the presence of FeNi foam using in situ surface-enhanced Raman spectroscopy. This research also explores the use of in situ surface-enhanced Raman spectroscopy for detecting species on foam surfaces during the OER. The acidic media around the electrode not only limit the process but also affect the phosphate ion protonation and overall catalysis effectiveness. The study proposes that FeNi hydroxides serve as true catalysts for OER under neutral conditions, rather than FeNi phosphates. However, phosphate species remain crucial for proton transfer and water molecule adsorption. Changes observed in pH at the open-circuit potential suggest new insights concerning the coordination of Ni(II) to phosphate ions under certain conditions. By extrapolating the Tafel plot, the overpotential for the onset of OER was determined to be 470 mV. Furthermore, the overpotentials for current densities of 1 and 5 mA/cm2 were 590 and 790 mV, respectively. These findings offer valuable insights into the advancement of the OER catalysts and our understanding of the underlying mechanism for efficient water splitting; both are crucial elements for the purpose of energy storage.

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In situ monitoring of Suzuki-Miyaura cross-coupling reaction by using surface-enhanced Raman spectroscopy on a bifunctional Au-Pd nanocoronal film

Cited by 10 publications

References 46 publications

Core–Shell Gold Nanoparticles@Pd-Loaded Covalent Organic Framework for In Situ Surface-Enhanced Raman Spectroscopy Monitoring of Catalytic Reactions

Core–Shell Gold Nanoparticles@Pd-Loaded Covalent Organic Framework for In Situ Surface-Enhanced Raman Spectroscopy Monitoring of Catalytic Reactions

VSe_2–xO_x@Pd Sensor for Operando Self-Monitoring of Palladium-Catalyzed Reactions

Unveiling the Oxygen Evolution Mechanism with FeNi (Hydr)oxide under Neutral Conditions

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In situ monitoring of Suzuki-Miyaura cross-coupling reaction by using surface-enhanced Raman spectroscopy on a bifunctional Au-Pd nanocoronal film

Cited by 10 publications

References 46 publications

Core–Shell Gold Nanoparticles@Pd-Loaded Covalent Organic Framework for In Situ Surface-Enhanced Raman Spectroscopy Monitoring of Catalytic Reactions

Core–Shell Gold Nanoparticles@Pd-Loaded Covalent Organic Framework for In Situ Surface-Enhanced Raman Spectroscopy Monitoring of Catalytic Reactions

VSe2–xOx@Pd Sensor for Operando Self-Monitoring of Palladium-Catalyzed Reactions

Unveiling the Oxygen Evolution Mechanism with FeNi (Hydr)oxide under Neutral Conditions

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VSe_2–xO_x@Pd Sensor for Operando Self-Monitoring of Palladium-Catalyzed Reactions