Selective determination of dopamine using quantum-sized gold nanoparticles protected with charge selective ligands

Kwak, Kyuju; Kumar, Santosh; Lee, Dongil

doi:10.1039/c2nr30481c

Cited by 58 publications

(55 citation statements)

References 43 publications

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“…Thiolate-protected palladium nanoclusters with a mass of approximately 5 kDa are synthesized by using a one-phase method, and the chemical formula is estimated to be Pd [13][14][15][16][17] (SR) [18][19][20][21][22] . The ultrasmall palladium nanoclusters exhibit excellent performance for the ORR in alkaline solutions.…”

Section: Discussionmentioning

confidence: 99%

Ultrasmall Palladium Nanoclusters as Effective Catalyst for Oxygen Reduction Reaction

et al. 2016

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The recent prosperity of ultrasmall gold nanoclusters makes it desirable to expand the family of clusters to other metals. Here, we present a one‐phase approach for synthesizing thiolate‐protected palladium nanoclusters with a mass of approximately 5 kDa. Such nanoclusters are further evaluated for the oxygen reduction reaction in alkaline solutions. Ligand‐on palladium nanoclusters exhibit an onset potential of −0.09 V (vs. Ag/AgCl) and superior durability in open air. With ligands removed, the palladium nanoclusters display an onset potential of −0.02 V and a higher mass activity (272.4 A g−1 at the potential of −0.15 V) than that of Pt/C (166.6 A g−1). Kinetic investigation indicates a direct four‐electron reduction pathway over palladium nanoclusters, which is preferred in oxygen reduction, owing to enhanced power generation. The efficient catalytic performance of palladium nanoclusters makes them an excellent candidate as electrocatalysts in fuel cell technology.

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Section: Discussionmentioning

confidence: 99%

Ultrasmall Palladium Nanoclusters as Effective Catalyst for Oxygen Reduction Reaction

et al. 2016

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“…Recently, thiolate‐protected gold nanoclusters—Au n (SR) m (where n and m represent the numbers of gold atoms and thiolate ligands, respectively)—have emerged as a new class of nanomaterials and hold promising applications in areas such as photovoltaics, sensing, catalysis, optics, etc. Gold nanoclusters of different magic sizes have been obtained and the atomic structures of some of the gold nanoclusters have been elucidated by single crystal X‐ray diffraction analysis .…”

Section: Xps‐measured Mo:s:au Relative Atomic Ratio Of the Working Elmentioning

confidence: 99%

Atomically Precise Gold Nanoclusters Accelerate Hydrogen Evolution over MoS₂ Nanosheets: The Dual Interfacial Effect

Zhao

Jin

Song

et al. 2017

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Hydrogen generation via electrocatalytic water splitting holds great promise for future energy revolution. It is desirable to design abundant and efficient catalysts and achieve mechanistic understanding of hydrogen evolution reaction (HER). Here, this paper reports a strategy for improving HER performance of molybdenum disulfide (MoS ) via introducing gold nanoclusters as a cocatalyst. Compared to plain MoS nanosheets, the Au (SR) /MoS nanocomposite exhibits enhanced HER activity with a small onset potential of -0.20 V (vs reversible hydrogen electrode) and a higher current density of 59.3 mA cm at the potential of -0.4 V. In addition to the interfacial interaction between nanoclusters and MoS , the interface between the Au core and the surface ligands (thiolate vs selenolate) is also discovered to distinctly affect the catalytic performance. This work highlights the promise of metal nanoclusters in boosting the HER performance via tailoring the interfacial electronic interactions between gold nanoclusters and MoS nanosheets, as well as the interface between metal core and surface ligands.

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“…Particularly,t he knowledge of stable gold clusters has been well developed leading to the understanding of both structural and electronic properties, [11][12][13][14][15][16][17][18] with promising applicationsi nb iomedicine, catalysis, and sensing, among others. [9,10,[19][20][21][22][23][24] The last decadeh as witnessed tremendous advances in synthetic strategies for atomically precise aggregates,w here ligand-protected architectures rise as an effective method towards obtaining size-controlled structures. [12,17] In such systems, an inner metallic core composed of af inite number of atomsi se mbedded into an outer protecting layer made of various stabilizing groups.U sually,c halcogenolate, halogenide, and/or phosphine ligandsa re employed:t he former often leads to ap rotectingl ayer involving both ligands and M I atoms, [6,[25][26][27] whichp revents further degradation.…”

Section: Introductionmentioning

confidence: 99%

Coinage Metal Superatomic Cores: Insights into Their Intrinsic Stability and Optical Properties from Relativistic DFT Calculations

Gam

Páez‐Hernández

Arratia‐Pérez

et al. 2017

Chemistry A European J

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Coinage-metal atomically precise nanoclusters are made of a well-defined metallic core embedded in a ligand-protecting outer shell. Whereas gold derivatives are particularly well documented, examples of silver nanoclusters are somewhat limited and copper species remain particularly scare. Our DFT relativistic calculations on superatomic metallic cores indicate that copper species are almost as stable as gold clusters and more stable than their silver counterparts. Thus, for silver superatomic cores, the role of the stabilizing ligands is more crucial in the stabilization of the overall structure, in comparison to copper and gold. Hence, the chemistry of the earlier counterparts of gold, especially copper, should grow quickly with at least characterizations of species related to that found in the heavier elements in the triad, which requires tackling synthetic challenges. Time-dependent (TD)-DFT calculations show that with an increase of the cluster core nuclearity, the absorption bands are redshifted, allowing us to differentiate between the clusters types. Moreover, the optical properties of the silver cores are fairly different from that of their Cu and Au relatives.

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Selective determination of dopamine using quantum-sized gold nanoparticles protected with charge selective ligands

Cited by 58 publications

References 43 publications

Ultrasmall Palladium Nanoclusters as Effective Catalyst for Oxygen Reduction Reaction

Ultrasmall Palladium Nanoclusters as Effective Catalyst for Oxygen Reduction Reaction

Atomically Precise Gold Nanoclusters Accelerate Hydrogen Evolution over MoS₂ Nanosheets: The Dual Interfacial Effect

Coinage Metal Superatomic Cores: Insights into Their Intrinsic Stability and Optical Properties from Relativistic DFT Calculations

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Selective determination of dopamine using quantum-sized gold nanoparticles protected with charge selective ligands

Cited by 58 publications

References 43 publications

Ultrasmall Palladium Nanoclusters as Effective Catalyst for Oxygen Reduction Reaction

Ultrasmall Palladium Nanoclusters as Effective Catalyst for Oxygen Reduction Reaction

Atomically Precise Gold Nanoclusters Accelerate Hydrogen Evolution over MoS2 Nanosheets: The Dual Interfacial Effect

Coinage Metal Superatomic Cores: Insights into Their Intrinsic Stability and Optical Properties from Relativistic DFT Calculations

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Atomically Precise Gold Nanoclusters Accelerate Hydrogen Evolution over MoS₂ Nanosheets: The Dual Interfacial Effect