Water-Soluble Pd Nanoparticles Capped with Glutathione: Synthesis, Characterization, and Magnetic Properties

Sharma, Sachil; Kim, Bit; Lee, Dongil

doi:10.1021/la303326u

Cited by 42 publications

(41 citation statements)

References 53 publications

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“…[39] Water-soluble palladium nanoparticles were also synthesized with glutathione and w-carboxyl-S-alkanethiosulfate as a protecting ligand. [40,41] However, thiolateprotected palladium nanoclusters containing tens of atoms have not yet been successfully fabricated.…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

Ultrasmall Palladium Nanoclusters as Effective Catalyst for Oxygen Reduction Reaction

et al. 2016

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“…[28][29][30]41 Most of these studies were oriented toward catalytic applications [42][43][44] and sensor devices. 45,46 The direct reduction route that was developed in this study makes use of biocompatible molecules (AA DMSA), enabling the synthesis of Pd and Pd@Au NPs.…”

Section: Resultsmentioning

confidence: 99%

“…Indeed, Pd 3d 5/2 of S1 NPs are characterised by two peaks: the first peak at 336.3 eV can be attributed to the metallic specie (Pd 0 ), while the second peak (337.8 eV) is generally associated to oxidised Pd. 30,54,55 The deconvolution of Pd 3d 5/2 in S3 and S2 NPs, revealed only one peak around 337 eV (between Pd 0 and Pd). The observed shift was attributed to the same ligand configuration that led to the FTIR bands at 1600 and 1360 cm -1 , corresponding to the antisymmetric and symmetric vibrations of carboxylate groups upon chelation with Pd NPs.…”

Section: Physico-chemical Analysis Of S1-s3 Nps Surfacementioning

confidence: 99%

“…Indeed, before reduction, the precursor H 2 PdCl 4 solution exhibited two UV-Vis peaks at 420 nm and 305 nm, attributed to metal-ligand charge transfer. 30,47 Because Pd 2+ ions were reduced in Pd 0 , the bands do not appear in S1-S3 (Fig. 1b-d).…”

Section: Synthesis Of Pd (S1-s3) Npsmentioning

confidence: 99%

“…In fact, direct reduction techniques are possibly the most efficient routes to achieve high synthesis yields, and to facilitate manipulation and purification of Au and Pd NPs in aqueous media. [28][29][30][31] However, such methods are mainly based on the use of potentially toxic reducing agents, 32 shape-directing additives (e.g. CTAB 33 ) as well as organic solvents 27,34 .…”

Section: Introductionmentioning

confidence: 99%

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Rapid, one-pot procedure to synthesise¹⁰³Pd:Pd@Au nanoparticles en route for radiosensitisation and radiotherapeutic applications

et al. 2015

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ARTICLEThis journal is © The Royal Society of Chemistry 2013 J. Name., 2013, 00, 1--3 | 1 The radioisotope palladium ( 103 Pd), encapsulated in millimetre-size seed implants, is widely used in prostate cancer brachytherapy. Gold nanoparticles (Au NPs) distributed in the vicinity of 103 Pd radioactive implants, strongly enhance the therapeutic dose of radioactive implants (radiosensitisation effect). A new strategy under development to replace millimetre-size implants, consist in injecting radioactive NPs in the affected tissues. The development of 103 Pd@Au NPs distributed in the diseased tissue, could increase the uniformity of treatment (compared with massive seeds), while enhancing the radiotherapeutic dose to the cancer cells (through Au-mediated radiosensitisation effect). To achieve this goal, it is necessary to develop a rapid, efficient, one-pot and easy-to-automatise procedure, allowing the synthesis of coreshell Pd@Au NPs. The novel synthesis route proposed here enables the production of Pd@Au NPs in not more than 4h, in aqueous media, with minimal manipulations, and relying on biocompatible and non-toxic molecules. This rapid multi-step process consists of the preparation of ultra-small Pd NPs by chemical reduction of an aqueous solution of H 2 PdCl 4 supplemented with ascorbic acid (AA) as reducing agent and 2, 3-meso-dimercaptosuccinic acid (DMSA) as a capping agent. Pd conversion yields close to 87% were found, indicating the efficiency of the reaction process. Then Pd NPs were used as seeds for the growth of a gold shell (Pd@Au), followed by grafting with polyethylene glycol (PEG) to ensure colloidal stability. Pd@Au-PEG (TEM: 20.2 ± 12.1 nm) formed very stable colloids in saline solution as well as in cell culture medium. The physico-chemical properties of the particles were characterised by FTIR, XPS, and UV-vis. spectroscopies. The viability of PC3 human prostate cancer cells was not affected after a 24-h incubation cycle with Pd@Au-PEG NPs to concentrations up to 4.22 mM Au. Finally, suspensions of Pd@Au-PEG NPs measured in computed tomography (CT) are found to attenuate X-rays more efficiently than commercial Au NPs CT contrast media. A proof-of-concept was performed to demonstrate the possibility synthesise radioactive 103 Pd:Pd@Au-PEG NPs. This study reveals the possibility to synthesise Pd@Au NPs rapidly (including radioactive 103 Pd:Pd@Au-PEG NPs), and following a methodology that respects all the strict requirements underlying the production of NPs for radiotherapeutic use (rapidity, reaction yield, colloidal stability, NPs concentration, purification). Journal of Materials Chemistry B RSCPublishing ARTICLEThis journal is

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Pd Sulfidation‐Induced 1T‐Phase Tuning in Monolayer MoS₂ for Hydrogen Evolution Reaction

Duy

Jeong

Bae

et al. 2023

Advanced Energy Materials

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For single-atom-layer hydrogen evolution reaction catalysts, enrichment of the 1T-phase in monolayer molybdenum disulfide is important to achieve ideal metal utilization efficiency and exposure of active surface atoms. Herein, it is discovered that the 1T-phase degree in monolayer MoS 2 can be enhanced through sulfidation of the Pd species deposited on MoS 2 (Pd x S y /1T-MoS 2 ). Raman and X-ray photoelectron spectroscopy reveal that the sulfidation-assisted phase transition results in considerably greater proportions of 1T-phase fraction (up to 86%) without using alkali-metal-based approaches. Observations of S-atom displacement/translation at the atomic level contribute to the understanding of the phase transformation of MoS 2 . The maximized surface atom activation and metal utilization efficiency in Pd x S y /1T-MoS 2 lead to unprecedentedly high mass activity (−3444 A mg Pd −1 ) and turnover frequency (1892 s −1 ), three orders of magnitude higher than those of commercial Pt/C 10 wt% (3.6 A mg Pt −1 and 3.6 s −1 ). The sulfidation-assisted 1T-phase enrichment has major implications for the designs of efficient electrocatalysts through MoS 2 phase engineering.

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Water-Soluble Pd Nanoparticles Capped with Glutathione: Synthesis, Characterization, and Magnetic Properties

Cited by 42 publications

References 53 publications

Ultrasmall Palladium Nanoclusters as Effective Catalyst for Oxygen Reduction Reaction

Ultrasmall Palladium Nanoclusters as Effective Catalyst for Oxygen Reduction Reaction

Rapid, one-pot procedure to synthesise¹⁰³Pd:Pd@Au nanoparticles en route for radiosensitisation and radiotherapeutic applications

Pd Sulfidation‐Induced 1T‐Phase Tuning in Monolayer MoS₂ for Hydrogen Evolution Reaction

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Water-Soluble Pd Nanoparticles Capped with Glutathione: Synthesis, Characterization, and Magnetic Properties

Cited by 42 publications

References 53 publications

Ultrasmall Palladium Nanoclusters as Effective Catalyst for Oxygen Reduction Reaction

Ultrasmall Palladium Nanoclusters as Effective Catalyst for Oxygen Reduction Reaction

Rapid, one-pot procedure to synthesise103Pd:Pd@Au nanoparticles en route for radiosensitisation and radiotherapeutic applications

Pd Sulfidation‐Induced 1T‐Phase Tuning in Monolayer MoS2 for Hydrogen Evolution Reaction

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Product

Resources

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Rapid, one-pot procedure to synthesise¹⁰³Pd:Pd@Au nanoparticles en route for radiosensitisation and radiotherapeutic applications

Pd Sulfidation‐Induced 1T‐Phase Tuning in Monolayer MoS₂ for Hydrogen Evolution Reaction