C<sub>2</sub>H<sub>2</sub> Treatment as a Facile Method to Boost the Catalysis of Pd Nanoparticulate Catalysts

Dai, Yan; Liu, Shengjie; Zheng, Nanfeng

doi:10.1021/ja501530n

Cited by 85 publications

(65 citation statements)

References 43 publications

(56 reference statements)

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“…It has been reported that the monolayer obtained by the reaction of alkynes with hydroxyl‐terminated surfaces shows a higher stability compared to that obtained by the reactions of silanes, phosphonates, and alkenes . The contact angles of water droplets on TNA were measured to verify the change in their surface hydrophilicity . As shown in Figure b, the contact angle on the nanotube arrays changed from 0° to 14° after the PA treatment, implying that TNA became more hydrophobic.…”

Section: Resultsmentioning

confidence: 91%

Atomically Precise Bimetallic Nanoclusters as Photosensitizers in Photoelectrochemical Cells

Wang

Liu

Kovalenko

et al. 2019

Chemistry A European J

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The atomically precise bimetallic nanocluster (NC), Au24Ag20(PhCC)20(SPy)4Cl2 (1) (Py=pyridine), was employed for the first time as a stable photosensitizer for photoelectrochemical applications. The sensitization of TiO2 nanotube arrays (TNA) with 1 greatly enhances the light‐harvesting ability of the composite because 1 shows a high molar extinction coefficient (ϵ) in the UV/Vis region. Compared to a more standard Au25(SG)18‐TNA (2‐TNA; SG=glutathione) composite, 1‐TNA shows a much better stability under illumination in both neutral and basic conditions. The precise composition of the photosensitizers enables a direct comparison of the sensitization ability between 1 and 2. With the same cluster loading, the photocurrent produced by 1‐TNA is 15 times larger than that of 2‐TNA. The superior performance of 1‐TNA over 2‐TNA is attributed not only to the higher light absorption ability of 1 but also to the higher charge‐separation efficiency. Besides, a ligand effect on the stability of the photoelectrode and charge‐transfer between the NCs and the semiconductor is revealed. This work paves the way to study the role of metal nanoclusters as photosensitizers at the atomic level, which is essential for the design of better material for light energy conversion.

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Section: Resultsmentioning

confidence: 91%

Atomically Precise Bimetallic Nanoclusters as Photosensitizers in Photoelectrochemical Cells

Wang

Liu

Kovalenko

et al. 2019

Chemistry A European J

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“…The resulting coated-nanostructures where surprisingly more active in the hydrogenation of styrene than their naked counterparts [100].…”

Section: Modelling the Kinetics And The Diffusion Process In Capped Nmentioning

confidence: 97%

Untangling the Role of the Capping Agent in Nanocatalysis: Recent Advances and Perspectives

et al. 2016

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Capping agents (organic ligands, polymers, surfactants, etc.) are a basic component in the synthesis of metal nanoparticles with controlled size and well-defined shape. However, their influence on the performances of nanoparticle-based catalysts is multifaceted and controversial. Indeed, capping agent can act as a "poison", limiting the accessibility of active sites, as well as a "promoter", producing improved yields and unpredicted selectivity control. These effects can be ascribed to the creation of a metal-ligand interphase, whose unique properties are responsible for the catalytic behavior. Therefore, understanding the structure of this interphase is of prime interest for the optimization of tailored nanocatalyst design. This review provides an overview of the interfacial key features affecting the catalytic performances and details a selection of related literature examples. Furthermore, we highlight critical points necessary for the design of highly selective and active catalysts with surface and interphase control.

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“…Zheng et al . obtained a surface hydrophobic Pd catalyst by depositing trans‐polyacetylene layer on Pd nanoparticles . This modified catalyst showed higher activity than the unmodified catalyst in the hydrogenation of styrene and nitrobenzene.…”

Section: Figurementioning

confidence: 99%

Fabrication of Pd/SiO₂ with Controllable Wettability for Enhanced Catalytic Hydrogenation Activity at Ambient H₂ Pressure

et al. 2019

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The wettability had great influence on the catalytic performance of heterogeneous catalyst. In this manuscript, relationship between wettability and catalytic performance was studied by the preparation of Pd/SiO2 with controllable wettability employing surface‐bonded vinyl as the reductant. The surface‐bonded vinyl ensured the reduction of PdCl2 on the hydrophobic surface of SiO2 to afford the hydrophobic Pd/SiO2. The wettability of the catalysts could be adjusted by changing the content of phenyl on the surface. The catalysts were characterized by solid‐state CP/MAS NMR, TEM, HRTEM, XPS, XRD and ICP‐AES as well as water droplet contact angles. The catalysts showed zero‐order kinetics for the hydrogenation of styrene under mild conditions. The activation energy for this reaction was measured by the Arrhenius formula. The wettability was proved to influence the reaction activity by changing the activation energy. The increase in hydrophobicity led to higher activity by decreasing the activation energy for hydrogenation of styrene to ethylbenzene.

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C₂H₂ Treatment as a Facile Method to Boost the Catalysis of Pd Nanoparticulate Catalysts

Cited by 85 publications

References 43 publications

Atomically Precise Bimetallic Nanoclusters as Photosensitizers in Photoelectrochemical Cells

Atomically Precise Bimetallic Nanoclusters as Photosensitizers in Photoelectrochemical Cells

Untangling the Role of the Capping Agent in Nanocatalysis: Recent Advances and Perspectives

Fabrication of Pd/SiO₂ with Controllable Wettability for Enhanced Catalytic Hydrogenation Activity at Ambient H₂ Pressure

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C2H2 Treatment as a Facile Method to Boost the Catalysis of Pd Nanoparticulate Catalysts

Cited by 85 publications

References 43 publications

Atomically Precise Bimetallic Nanoclusters as Photosensitizers in Photoelectrochemical Cells

Atomically Precise Bimetallic Nanoclusters as Photosensitizers in Photoelectrochemical Cells

Untangling the Role of the Capping Agent in Nanocatalysis: Recent Advances and Perspectives

Fabrication of Pd/SiO2 with Controllable Wettability for Enhanced Catalytic Hydrogenation Activity at Ambient H2 Pressure

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Product

Resources

About

C₂H₂ Treatment as a Facile Method to Boost the Catalysis of Pd Nanoparticulate Catalysts

Fabrication of Pd/SiO₂ with Controllable Wettability for Enhanced Catalytic Hydrogenation Activity at Ambient H₂ Pressure