Metal Nanoclusters Stabilized with Simple Ions and Solvents—Promising Building Blocks for Future Catalysts

Wang, Yuan; Zhang, Junling; Wang, Xiaodong; Ren, Jiawen; Zuo, Bin; Tang, Youqi

doi:10.1007/s11244-005-3811-7

Cited by 68 publications

(52 citation statements)

References 48 publications

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“…The Pt-Rh nanoparticle are synthesized by variety of experiments including polyol synthesis method for clusters stabilized by ethylene glycol and OH À , NaY-supported clusters using ionexchange method, colloid synthesis in polymer solutions using borohydride-reduction, and pulsed laser ablation. 1,[9][10][11][12][13][14][15] Since the catalytic property should significantly depend on its atomic arrangements, size, and composition, their structure have been carefully studied using such as Transmission Electron Microscope (TEM), Extended X-ray Absorption FineStructure (EXAFS), dispersive X-ray (EDX) analysis, and X-ray photoelectron spectroscopy (XPS). The synthesized particle typically has diameter with 1-4 nm and its atomic arrangements or preferably segregated species depends on sample preparation condition or method.…”

Section: Introductionmentioning

confidence: 99%

First-Principles Study on Stability and Electronic Structures of Pt-Rh Bimetallic Nanoparticles

2010

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Energetic stability and electronic structures of Pt atoms in Pt-Rh nanoparticle is investigated by first-principles calculation. Pt atom energetically prefer surface sites (vertex, edge, and (100)) rather than subsurface and core site, which is attributed to lower Pt surface energy compared with Rh. Vertex of nanoparticle is the most favorable site for Pt atom, which has lowest coordination numbers. Band center of d-state electronic contribution for Pt atom measured from the Fermi energy exhibit negative dependence with respect to Pt coordination number. This can be attributed to positive dependence of second-order moment of density of states for the Pt d-band on the coordination number. Pt segregation to the surface is expected due mainly to contribution from Pt on-site segregation energy compared with weak ordering tendency of Pt-Rh unlike-atom pairs.

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Section: Introductionmentioning

confidence: 99%

First-Principles Study on Stability and Electronic Structures of Pt-Rh Bimetallic Nanoparticles

2010

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“…Na niskim pH vrednostima (do 6) interakcija između Pt i kisele forme etilen glikola (sirćetna kiselina) je mala, pa zbog toga Pt čestice nisu stabilne i više aglomeriraju. Wang [14] je istakao da se i dodatkom vode tj. kontrolisanim odnosom etilen gikola i vode (20:1) kao i kontrolisanim molarnim odnosom hidroksida prema molarnom odnosu metala takođe postiže optimalna veličina metalnih čestica.…”

Section: Uvodunclassified

Influence of the synthesis procedures on pt catalyst activity for ethanol electrooxidation reaction

Stevanovic¹,

Jovanović²,

Rogan³

et al. 2016

Zas Mat

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“…The Pt/MWNT nanocomposites displayed a significantly higher catalytic performance than that of the commercial catalyst Pt/XC-72 (Vulcan CS-72, Cabot Corporation, MA, USA) having a BrunauerEmmett-Teller (BET) surface area of 237 m 2 /g. Thus, the preparation of the small metal nanoparticles by the surfactant-free polyol process is an attractive way of obtaining heterogeneous catalysts [122] .…”

Section: Electrocatalysismentioning

confidence: 99%

Surfactant-free solution-based synthesis of metallic nanoparticles toward efficient use of the nanoparticles’ surfaces and their application in catalysis and chemo-/biosensing

Kawasaki

2013

Nanotechnology Reviews

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Abstract:The choice of stabilizer and the stabilizer-toprecursor ions molar ratio during metal nanoparticle synthesis are important for controlling the shape, size, and dispersion stability of the nanoparticles. However, the active sites on the nanoparticles surfaces may be blocked by the stabilizing agents used, resulting in a less-than-effective utilization of the surfaces. In this review, various surfactant-free solution-based methods of synthesizing metal nanoparticles are described, along with the applications of such nanoparticles in catalysis and sensing. " Surfactant-free " synthesis does not imply truly bare metal nanoparticles synthesis but implies one where the metal nanoparticles are prepared in the absence of additional stabilizing agents such as thiolate and phosphine compounds, surfactants, and polymers. These metal nanoparticles are stabilized by the solvents or the simple ions of the reducing agents or low-molecular-weight salts used. Surfactant-free synthesis of metal nanoparticles via photochemical-, ultrasonochemical-, and laser ablation-mediated synthesis methods is also described. Because of the effective utilization of their surfaces, metal nanoparticles prepared without surfactants, polymers, templates, or seeds are expected to exhibit high performance when used in catalysis (synthetic catalysis and electrocatalysis) and sensing (surface-enhanced Raman scattering (SERS)), surfaceassisted laser desorption/ionization-mass spectrometry (SALDI-MS)).

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Metal Nanoclusters Stabilized with Simple Ions and Solvents—Promising Building Blocks for Future Catalysts

Cited by 68 publications

References 48 publications

First-Principles Study on Stability and Electronic Structures of Pt-Rh Bimetallic Nanoparticles

First-Principles Study on Stability and Electronic Structures of Pt-Rh Bimetallic Nanoparticles

Influence of the synthesis procedures on pt catalyst activity for ethanol electrooxidation reaction

Surfactant-free solution-based synthesis of metallic nanoparticles toward efficient use of the nanoparticles’ surfaces and their application in catalysis and chemo-/biosensing

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