Gold clusters: reactions and deuterium uptake

Cox, D. M.; Brickman, R. O.; Creegan, K. M.; Kaldor, A.

doi:10.1007/978-3-642-76178-2_84

Cited by 27 publications

(35 citation statements)

References 13 publications

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“…As shown in Fig. 7(b), about 90% of the chlorinated aromatic compound was reduced within 24 h. Small amounts of chlorinated compounds (1,2,3-trichlorobenzene, 1,2,4,5-tetrachlorobenzene, hexachlorobenzene) that remained in the solution were completely (detention limits <10 mg) reduced within 48 h. Similar results were also observed for dechlorination of PCB mixtures by using the nanoscale Pd/Fe particles [15]. …”

Section: Resultssupporting

confidence: 77%

“…Nanoscale metal particles, with diameter in the range 1±100 nm, are synthesized in the laboratory. These particles are characterized by high surface area to volume ratio, high level of stepped surface, and high surface energy [14,15]. Furthermore, a bimetallic structure [16,17] is adopted in which a thin layer of catalyst (e.g., Pd, Pt) is doped on the surface of a reductant (e.g., Fe, Zn).…”

Section: Introductionmentioning

confidence: 99%

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Treatment of chlorinated organic contaminants with nanoscale bimetallic particles

1998

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Section: Resultssupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Treatment of chlorinated organic contaminants with nanoscale bimetallic particles

1998

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“…9 For Au n O 2 − with odd n, Wang and coworkers prepared Au 5 O 2 − and Au 7 O 2 − in a molecular beam and determined from photoelectron spectroscopy that O 2 is weakly physisorbed on Au 5 − and Au 7 − . 7 These spectroscopic findings are consistent with the pioneering work of Cox et al 20 Although O 2 molecularly adsorbed on Au n − has been investigated extensively, theoretical calculations suggest that O 2 dissociatively adsorbed on Au 4 O 2 − is the most stable structure. 14 Au n O 2 − with molecularly adsorbed O 2 is found in all cases except Au 3 O 2 − , in which the clusters are prepared by reaction of Au n − with O 2 , owing to the energy barrier between molecularly and dissociatively adsorbed forms.…”

Section: ■ Introductionsupporting

confidence: 82%

Isomers of Anionic Gold Oxide Clusters, Au_nO₂^–, Investigated by Thermal Desorption Spectrometry

Yamaguchi

Mafuné

2017

J. Phys. Chem. C

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Anionic gold oxide clusters, Au n O2 – (n = 2–5), were prepared by sequential O atom transfer reactions from N2O to Au n –. Response of the clusters to heat was investigated by gas-phase thermal desorption spectrometry and was compared with the behavior of Au n O2 – prepared by the reaction of Au n – with O2. No desorption of O2 was observed from Au4O2 – prepared with N2O until 1000 K, but O2 desorbed from Au4O2 – prepared with O2 at 500 K, indicating the formation of structural isomers. Theoretical calculations show that the most stable form of Au4O2 –, which contains dissociated O atoms, is produced by oxidation with N2O and that the third most stable form of Au4O2 –, which contains molecular O2, is produced by oxidation with O2. The desorption energy of O2 from Au5O2 –, in which O2 is dissociatively chemisorbed on Au5 –, was estimated from the temperature dependence of the cluster signal intensities. The experimentally determined desorption energies were consistent with the values obtained by theoretical calculation.

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“…Palladium, with its catalytic ability, produces dramatic results as well. Nanoscale metal particles, with diameter in the range of 1-100 nm (10 -9 to 10 -7 m), are characterized by high surface area to volume ratios, high levels of stepped surface, and high surface energies (12,13). The Pd/Fe bimetallic complexes have also been found to degrade PCBs with all the chlorines replaced by hydrogen to yield biphenyl (11).…”

Section: Introductionmentioning

confidence: 99%

Synthesizing Nanoscale Iron Particles for Rapid and Complete Dechlorination of TCE and PCBs

Wang

Zhang

1997

Environ. Sci. Technol.

1,490

918

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Transformation of halogenated organic compounds (HOCs) by zero-valent iron represents one of the latest innovative technologies for environmental remediation. For example, iron can be used to construct a reactive wall in the path of a contaminated groundwater plume to degrade HOCs. In this paper, an efficient method of synthesizing nanoscale (1−100 nm) iron and palladized iron particles is presented. Nanoscale particles are characterized by high surface area to volume ratios and high reactivities. BET specific surface area of the synthesized metal particles is 33.5 m2/g. In comparison, a commercially available Fe powder (<10 μm) has a specific surface area of just 0.9 m2/g. Batch studies demonstrated that these nanoscale particles can quickly and completely dechlorinate several chlorinated aliphatic compounds and a mixture of PCBs at relatively low metal to solution ratio (2−5 g/100 mL). Surface-area-normalized rate constants (K SA) are calculated to be 10−100 times higher than those of commercially available iron particles. The approach presented offers unique opportunities for both fundamental research and technological applications of zero-valent metals. For example, a potential application of the nanoscale particles is to inject the metal particles directly into contaminated aquifers instead of building iron walls.

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Gold clusters: reactions and deuterium uptake

Cited by 27 publications

References 13 publications

Treatment of chlorinated organic contaminants with nanoscale bimetallic particles

Treatment of chlorinated organic contaminants with nanoscale bimetallic particles

Isomers of Anionic Gold Oxide Clusters, Au_nO₂^–, Investigated by Thermal Desorption Spectrometry

Synthesizing Nanoscale Iron Particles for Rapid and Complete Dechlorination of TCE and PCBs

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Gold clusters: reactions and deuterium uptake

Cited by 27 publications

References 13 publications

Treatment of chlorinated organic contaminants with nanoscale bimetallic particles

Treatment of chlorinated organic contaminants with nanoscale bimetallic particles

Isomers of Anionic Gold Oxide Clusters, AunO2–, Investigated by Thermal Desorption Spectrometry

Synthesizing Nanoscale Iron Particles for Rapid and Complete Dechlorination of TCE and PCBs

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Isomers of Anionic Gold Oxide Clusters, Au_nO₂^–, Investigated by Thermal Desorption Spectrometry