Preparation, characterization, and application of fine metal particles and metal colloids using hydrotriorganoborates

Bönnemann, Helmut; Brijoux, W.; Brinkmann, Rainer; Fretzen, Rainer; Joußen, Thomas; Köppler, Rainer; Korall, Barbara; Neiteler, Peter; Richter, Jonas

doi:10.1016/0304-5102(93)e0148-a

Cited by 291 publications

(152 citation statements)

References 54 publications

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“…Up till now, no test has been performed using carbon as support for application in electrocatalysis. The other chemical methods are the historical methods developed by Bönnemann and co-workers [94,120,121]. They have been adapted for electrocatalysts preparation [58,94].…”

Section: Other Synthetic Routesmentioning

confidence: 99%

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

et al. 2015

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Abstract:The oxygen reduction reaction (ORR) is the oldest studied and most challenging of the electrochemical reactions. Due to its sluggish kinetics, ORR became the major contemporary technological hurdle for electrochemists, as it hampers the commercialization of fuel cell (FC) technologies. Downsizing the metal particles to nanoscale introduces unexpected fundamental modifications compared to the corresponding bulk state. To address these fundamental issues, various synthetic routes have been developed in order to provide more versatile carbon-supported low platinum catalysts. Consequently, the approach of using nanocatalysts may overcome the drawbacks encountered in massive materials for energy conversion. This review paper aims at summarizing the recent important advances in carbon-supported metal nanoparticles preparation from colloidal methods (microemulsion, polyol, impregnation, Bromide Anion Exchange…) as cathode material in low temperature FCs. Special attention is devoted to the correlation of the structure of the nanoparticles and their catalytic properties. The influence of the synthesis method on the electrochemical properties of the resulting catalysts is also discussed. Emphasis on analyzing data from theoretical models to address the intrinsic and specific electrocatalytic properties, depending on the synthetic method, is incorporated throughout. The synthesis process-nanomaterials structure-catalytic activity relationships highlighted herein, provide ample new rational, convenient and OPEN ACCESSCatalysts 2015, 5 311 straightforward strategies and guidelines toward more effective nanomaterials design for energy conversion.

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Section: Other Synthetic Routesmentioning

confidence: 99%

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

et al. 2015

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“…In biology and biochemistry, nanoparticles have attracted much attention. Especially, PNPs with size in the range of 10 to 50 nm are most attractive for practical reasons [2][3][4][5][6]. Cancer killed 7.9 million people worldwide in 2007 [7].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of synthesized platinum nanoparticles on the MCF-7 and HepG-2 cancer cell lines

et al. 2013

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Platinum nanoparticles (PNPs) were synthesized by chemical reduction of potassium hexachloroplatinate (IV) with trisodium citrate under vigorous stirring and addition of sodium dodecyl sulfate as stabilizer reagent. Reducing agent was chosen depending on the oxidation reactions and potential values of the chemical materials used in the experiment. The aim of this study is to investigate the effects of PNPs on the different cancer cell lines and cytotoxicity study of this nanomaterial. The morphology of PNPs was investigated by scanning electron microscope (XL30, Philips Electronics, Amsterdam, The Netherlands) with the ability to perform elemental analysis by EDX. Malvern Zetasizer 3000 HSA (Malvern Instruments, Worcestershire, UK) was used to determine the distribution of particle size and zeta potential of PNPs. The cytotoxicity property of the nanoparticles was evaluated by MTT assay on MCF-7 and HepG-2 cell lines, and the cytotoxic concentration 50% values were determined for 24 h.

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“…In some cases, chemo-and enantioselectivities have been achieved with colloids which differ from those achieved with classical heterogeneous catalysts based on highly disperse metals. [2] More recently, metal colloids have also been studied as catalysts for reactions, for which it is not obvious that they can occur on a metal surface. Most notably, Heck and Suzuki coupling by palladium colloids has been investigated intensely.…”

Section: Introductionmentioning

confidence: 99%

Hydroformylation with Dendritic‐Polymer‐Stabilized Rhodium Colloids as Catalyst Precursors

Tuchbreiter

Mecking

2007

Macro Chemistry & Physics

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Hydroformylation of 1‐hexene with rhodium colloids stabilized by poly(ethylene imine) amides with a hyperbranched polyamine core and a lipophilic periphery is reported. The catalyst selectivity for aldehydes increases with increasing temperature or pressure. The ratio of linear to branched aldehydes decreases with increasing temperature. At 80 °C and 90 atm, 1‐hexene is converted completely with 96% selectivity for aldehydes, with a ratio of linear/branched aldehydes of 58:42. Turnover numbers up to 3 × 104 (calculated with respect to the entire amount of Rh present) were observed. The results indicate that the catalyst precursor colloids serve as a reservoir for the formation of soluble Rh(I) complexes as the active species.magnified image

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Preparation, characterization, and application of fine metal particles and metal colloids using hydrotriorganoborates

Cited by 291 publications

References 54 publications

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

Evaluation of synthesized platinum nanoparticles on the MCF-7 and HepG-2 cancer cell lines

Hydroformylation with Dendritic‐Polymer‐Stabilized Rhodium Colloids as Catalyst Precursors

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