Platinum nanoparticles stabilized by CO and octanethiol ligands or polymers: FT-IR, NMR, HREM and WAXS studies

Dassenoy, Fabrice; Philippot, Karine; Ould‐Ely, Teyeb; Amiens, Catherine; Lecante, Pierre; Snoeck, E.; Mosset, A.; Casanove, M. J.; Chaudret, Bruno

doi:10.1039/a709245h

Cited by 146 publications

(110 citation statements)

References 21 publications

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“…These lattice effects are similar to what may be observed in high vacuum and evidence the lack of stress experienced by the particles in these media [28] structure of the surface of such Pt particles was investigated by infrared spectroscopy of adsorbed CO (Fig. 2) [29].…”

Section: Stabilization By Polymersmentioning

confidence: 63%

Organometallic Nanoparticles of Metals or Metal Oxides

Chaudret

Philippot

2007

Oil & Gas Science and Technology - Rev. IFP

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*Dedicated to Yves Chauvin for his exceptional and exemplary contribution to organometallic chemistry and catalysis Ce manuscrit est dédié à Yves Chauvin pour sa contribution exceptionnelle et exemplaire à la chimie organométallique et à la catalyse Résumé -Revue sur la synthèse de nanoparticules de métaux et d'oxydes métalliques -Nous présentons dans cet article une revue sur la synthèse de nanoparticules de métaux et d'oxydes métalliques utilisant une approche organométallique et plus précisément des complexes de ligands hydrocarbures comme précurseurs. L'avantage principal de cette approche réside dans la décomposition facile de ces précurseurs qui peut être effectuée dans des conditions douces et qui ne génère aucun polluant potentiel des nanoparticules. Ceci permet le contrôle de la taille, de la forme et de l'état de surface des nanoparticules formées. Les résultats sont présentés par métaux et par mode de stabilisation (polymères, ligands, liquides ioniques). Nous présentons également quelques résultats concernant l'utilisation de cette approche pour la préparation de matériaux hybrides contenant des nanoparticules incluses dans des matrices minérales (membranes d'alumine, silice mésoporeuse). Enfin nous décrivons également une extension de cette approche pour la synthèse directe de nanoparticules en lit fluidisé. Abstract -Organometallic Nanoparticles of Metals or Metal Oxides

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Section: Stabilization By Polymersmentioning

confidence: 63%

Organometallic Nanoparticles of Metals or Metal Oxides

Chaudret

Philippot

2007

Oil & Gas Science and Technology - Rev. IFP

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“…[30] Related difficulties in observing all the expected NMR signals are also documented for colloidal metal nanoparticles stabilized by ligands. [31] Attempts to gather direct evidence for the presence of hydrogen in [H 6Àn Ni 34 C 4 (CO) 38 ] nÀ and [H 6Àn Ni 30 C 4 (CO) 34 30 …”

Section: Resultsmentioning

confidence: 99%

Synthesis, Molecular Structure and Properties of the [H_6−nNi₃₀C₄(CO)₃₄(CdCl)₂]ⁿ⁻ (n=3–6) Bimetallic Carbide Carbonyl Cluster: A Model for the Growth of Noncompact Interstitial Metal Carbides

Bernardi

Femoni

Iapalucci

et al. 2008

Chemistry A European J

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Reaction of the [Ni(9)C(CO)(17)](2-) dianion with CdCl(2)2.5 H(2)O in THF affords the novel bimetallic Ni--Cd carbide carbonyl clusters [H(6-n)Ni(30)C(4)(CO)(34)(micro(5)-CdCl)(2)](n-) (n=3-6), which undergo several protonation-deprotonation equilibria in solution depending on the basicity of the solvent or upon addition of acids or bases. Although the occurrence in solution of these equilibria complicates the pertinent electrochemical studies on their electron-transfer activity, they clearly indicate that the clusters [H(6-n)Ni(30)C(4)(CO)(34)(micro(5)-CdCl)(2)](n-) (n=3-6), as well as the structurally related [H(6-n)Ni(34)C(4)(CO)(38)](n-) (n=4-6), undergo reversible or partially reversible redox processes and provide circumstantial and unambiguous evidence for the presence of hydrides for n=3, 4 and 5. Three of the [H(6-n)Ni(30)C(4)(CO)(34)(micro(5)-CdCl)(2)](n-) anions (n=4-6) have been structurally characterized in their [NMe(3)(CH(2)Ph)](4)[H(2)Ni(30)C(4)(CO)(34)(CdCl)(2)]2 COMe(2), [NEt(4)](5)[HNi(30)C(4)(CO)(34)(CdCl)(2)]2 MeCN and [NMe(4)](6)[Ni(30)C(4)(CO)(34)(CdCl)(2)]6 MeCN salts, respectively. All three anions display almost identical geometries and bonding parameters, probably because charge effects are minimized by delocalization over such a large metal carbonyl anion. Moreover, the Ni(30)C(4) core in these Ni-Cd carbide clusters is identical within experimental error to those present in the [HNi(34)C(4)(CO)(38)](5-) and [Ni(35)C(4)(CO)(39)](6-) species, suggesting that the stepwise assembly of their nickel carbide cores may represent a general pathway of growth of nickel polycarbide clusters. The fact that the [H(6-n)Ni(30)C(4)(CO)(34)(micro(5)-CdCl)(2)](n-)(n=4-6) anions display two valence electrons more than the structurally related [H(6-n)Ni(34)C(4)(CO)(38)](n-) (n=4-6) species has been rationalized by extended Hückel molecular orbital (EHMO) analysis.

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“…7 Since Brust et al 8 reported on the monolayerprotected clusters (MPCs), significant advance in designing and synthesizing the MPCs has been demonstrated over the past decades. The platinum MPCs have been protected with thiol ligands such as octanethiol, 9 dodecanethiol, 10 which were soluble in various organic solvents, and β-cyclodextrin 11 and mercaptosuccinic acid, 12 which were soluble in water. However, the electrocatalytic activity, which involved the metal surface, suffered from a great extent of loss in the case of noble metal nanoparticles capped with strongly bonded molecules such as thiols.…”

Section: Introductionmentioning

confidence: 99%

Layer‐by‐layer Assembly of Noble Metal Nanoparticles on Glassy Carbon Electrode

Chen

Zheng

2008

Chin. J. Chem.

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Silver, gold, platinum and palladium nanoparticles were initially prepared in the AOT [sodium bis(2-ethylhexyl)-sulfosuccinate] micelle and characterized by ultraviolet-visible spectroscopy, transmission electron macroscopy, X-ray diffraction, Fourier transform-infrared spectroscopy, and zeta potential analysis. The negatively charged Pt nanoparticles were self-assembled on a glassy carbon electrode by a layer-by-layer method and the modified electrode electrocatalytic reactivity toward methanol oxidation was studied.

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Platinum nanoparticles stabilized by CO and octanethiol ligands or polymers: FT-IR, NMR, HREM and WAXS studies

Cited by 146 publications

References 21 publications

Organometallic Nanoparticles of Metals or Metal Oxides

Organometallic Nanoparticles of Metals or Metal Oxides

Synthesis, Molecular Structure and Properties of the [H_6−nNi₃₀C₄(CO)₃₄(CdCl)₂]ⁿ⁻ (n=3–6) Bimetallic Carbide Carbonyl Cluster: A Model for the Growth of Noncompact Interstitial Metal Carbides

Layer‐by‐layer Assembly of Noble Metal Nanoparticles on Glassy Carbon Electrode

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Platinum nanoparticles stabilized by CO and octanethiol ligands or polymers: FT-IR, NMR, HREM and WAXS studies

Cited by 146 publications

References 21 publications

Organometallic Nanoparticles of Metals or Metal Oxides

Organometallic Nanoparticles of Metals or Metal Oxides

Synthesis, Molecular Structure and Properties of the [H6−nNi30C4(CO)34(CdCl)2]n− (n=3–6) Bimetallic Carbide Carbonyl Cluster: A Model for the Growth of Noncompact Interstitial Metal Carbides

Layer‐by‐layer Assembly of Noble Metal Nanoparticles on Glassy Carbon Electrode

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Synthesis, Molecular Structure and Properties of the [H_6−nNi₃₀C₄(CO)₃₄(CdCl)₂]ⁿ⁻ (n=3–6) Bimetallic Carbide Carbonyl Cluster: A Model for the Growth of Noncompact Interstitial Metal Carbides