Influence of organic ligands on the stabilization of palladium nanoparticles

Ramirez, Esther; Jansat, Susanna; Philippot, Karine; Lecante, Pierre; Gómez, Montserrat; Masdeu‐Bultó, Anna M.; Chaudret, Bruno

doi:10.1016/j.jorganchem.2004.09.006

Cited by 174 publications

(145 citation statements)

References 51 publications

Supporting

Mentioning

132

Contrasting

Unclassified

Order By: Relevance

“…hydrolysis of the titanium precursor and the subsequent condensation reactions to form a Ti-O-Ti network [38]. By using surfactants with different functional groups and distinct binding strengths, the morphology of resulting particles could be controlled [39][40][41]. In our case it has been suggested that O A strongly binds to the Ti0 2 {001} faces [25,28], whereas OM tends to adhere on the {101} ones [18].…”

Section: Effect Of Surfactants and Surfactants Ratiomentioning

confidence: 71%

Soft solution fluorine-free synthesis of anatase nanoparticles with tailored morphology

Calatayud

Jardiel

Rodríguez

et al. 2013

Ceramics International

View full text Add to dashboard Cite

Ti0 2 nanoparticles with tailored morphology have been synthesized under exceptionally soft conditions. The strategy is based on the use of a non-aqueous alcoholic reaction medium in which water traces, coming either from the air (atmospheric water) or from an ethanol-water azeotropic mixture (ethanol 96%), are incorporated in order to accelerate hydrolysis of the Ti-precursor. Moreover, organic surfactants have been used as capping agents so as to tailor crystal growth in certain preferential directions. Combinations of oleic acid and oleylamine, which lead to the formation of another surfactant, dioleamide, are employed instead of fluorine-based compounds, thus increasing the sustainability of the process. As a result, Ti0 2 nanostructured hierarchical microspheres and individual nanoparticles with exposed high-energy facets can be obtained at atmospheric pressure and temperatures as low as 78 °C.

show abstract

Section: Effect Of Surfactants and Surfactants Ratiomentioning

confidence: 71%

Soft solution fluorine-free synthesis of anatase nanoparticles with tailored morphology

Calatayud

Jardiel

Rodríguez

et al. 2013

Ceramics International

View full text Add to dashboard Cite

show abstract

“…[43][44][45][46] In a similar manner it is expected that only one set of resonances should be observed in the 1 H NMR spectrum of the DMAP stabilized palladium nanoparticle dispersion that can be attributed to DMAP physisorbed on the nanoparticles and free in solution. Griffin has previously observed the presence of additional resonances similar to those observed here in the 1 H NMR spectrum of a deliberately under-reduced preparation of DMAP stabilized gold nanoparticles.…”

Section: H Nmr Characterisation Of the Dmap Stabilized Palladium Nanomentioning

confidence: 74%

Preparation and Characterization of 4-Dimethylaminopyridine-Stabilized Palladium Nanoparticles

2007

View full text Add to dashboard Cite

Abstract.DMAP stabilized palladium nanoparticles with a mean diameter of 3.4 0.5 nm are prepared from the aqueous phase reduction of Na 2 PdCl 4 using NaBH 4 in the presence of DMAP. TEM and UV-Vis spectroscopy characterization of the nanoparticle dispersion shows no obvious change in the nanoparticles several months after preparation.1 H NMR spectroscopy of the nanoparticles shows that the nanoparticle dispersion also contains a boron/DMAP complex and two palladium/DMAP complexes. One of the palladium complexes crystallizes out of the dispersion and is identified as Pd(DMAP) 4 (OH) 2 by X-Ray Crystallography. Following extensive analysis it is believed that the palladium/DMAP complexes are formed following the oxidation of the palladium nanoparticles. The prepared nanoparticle dispersion promotes selective hydrogen/deuterium (H/D) exchange on the carbon atoms to the endocyclic nitrogen atom on the DMAP stabilizing ligands through reaction with D 2 O. This activity is attributed to the presence of the nanoparticles rather than to the presence of the oxidized palladium/DMAP complexes.

show abstract

“…Therefore, general pathways for pure metal functionalization may lead to unstable bonds that can be impaired through the input of thermal, chemical or electrical energy 221,222 . Pure metal nanoparticles have been successfully functionalized with thiols 204,223,224 , di-sulfides 200 , amines 223,[225][226][227] , nitriles, carboxylic acids and phosphines 225,226,228 . Selected examples will be presented in the following sections.…”

Section: Chemistry On Pure Metal Surfacesmentioning

confidence: 99%

The fabrication and surface functionalization of porous metal frameworks – a review

Dumée

Bao

et al. 2013

J. Mater. Chem. A

View full text Add to dashboard Cite

Porous metal frameworks offer potentially useful applications for the aerospace, automotive and bio-medical industries. They can be used as electrodes, actuators, or as selective membrane films. The versatility of the physical features (pore size, pore depth, overall porosity and pore surface coverage) as well as the large range of surface chemistries for both metal oxides and pure noble metals offers scope to functionalise metal nano-particles and networks of nano-porous metal structures. As well as traditional routes to producing metal structures, such as metal sintering or foaming, novel high-throughput techniques have recently been investigated. Nanoparticle self-assembly, metal ion reduction and deposition as well as metal alloy de-alloying were identified as sustainable routes to produce large surface areas of such nano-porous metal frameworks. The main limitations of the current fabrication techniques include the difficulty to process stable and homogeneous arrays of nano-scale pores and the control of their morphology due to the high reactivity of nano-structured metal structures. This paper aims at critically reviewing the various fabrication techniques and surface functionalization routes used to produce advanced functional porous metal frameworks. The limitations and advantages of the different fabrication techniques will be discussed in light of the final material properties and targeted applications. Keywordsporous metal frameworks; porous metal fabrication routes; metal surface chemistry; application of metal frameworks; 3

show abstract

Influence of organic ligands on the stabilization of palladium nanoparticles

Cited by 174 publications

References 51 publications

Soft solution fluorine-free synthesis of anatase nanoparticles with tailored morphology

Soft solution fluorine-free synthesis of anatase nanoparticles with tailored morphology

Preparation and Characterization of 4-Dimethylaminopyridine-Stabilized Palladium Nanoparticles

The fabrication and surface functionalization of porous metal frameworks – a review

Contact Info

Product

Resources

About