Thermal stability and bonding in the silver complexes of ethylenediaminetetraacetic acid

Fiorucci, Antonio Rogério; Saran, Luciana Maria; Cavalheiro, Éder Tadeu Gomes; Neves, Eduardo Almeida

doi:10.1016/s0040-6031(00)00478-0

Cited by 20 publications

(20 citation statements)

References 23 publications

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“…Silver neodecanoate's molecular structure resembles that of commonly used carboxylic acid-based dispersants, such as caprylic acid (CH 3 (CH 2 ) 6 COOH), lauric acid (CH 3 (CH 2 ) 10 COOH), or oleic acid (CH 3 (CH 2 ) 7 CHCH-(CH 2 ) 7 COOH), with the exception that the hydrogen atom of its carboxylic group is substituted with a silver atom through ionic bonding. 24 After it dissolves in α-terpineol, the silver neodecanoate behaves analogously to a capping agent when its silver atom is adsorbed onto the surface of a silver particle where a polymeric dispersant is not anchored. 25 In contrast, silver acetate cannot be added to such silver paste with the solid Figure 2 shows that the contact resistivity of silver paste without silver neodecanoate generally exhibited a parabolic behavior at peak firing temperatures from 750 to 830°C.…”

Section: Resultsmentioning

confidence: 99%

Contact Resistivity Decrease at a Metal/Semiconductor Interface by a Solid-to-Liquid Phase Transitional Metallo-organic Silver

Shin

Seo

Kang

et al. 2014

ACS Appl. Mater. Interfaces

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We present a new approach to ensure the low contact resistivity of a silver paste at a metal/semiconductor interface over a broad range of peak firing temperatures by using a solid-to-liquid phase transitional metallo-organic silver, that is, silver neodecanoate. Silver nanoclusters, thermally derived from silver neodecanoate, are readily dissolved into the melt of metal oxide glass frit even at low temperatures, at which point the molten metal oxide glass frit lacks the dissociation capability of bulk silver into Ag(+) ions. In the presence of O(2-) ions in the melt of metal oxide glass frit, the redox reaction from Ag(+) to Ag(0) augments the noble-metal-assisted etching capability to remove the passivation layer of silicon nitride. Moreover, during the cooling stage, the nucleated silver atoms enrich the content of silver nanocolloids in the solidified metal oxide glass layer. The resulting contact resistivity of silver paste with silver neodecanoate at the metal/semiconductor interface thus remains low-between 4.12 and 16.08 mΩ cm(2)-whereas without silver neodecanoate, the paste exhibits a contact resistivity between 2.61 and 72.38 mΩ cm(2) in the range of peak firing temperatures from 750 to 810 °C. The advantage of using silver neodecanoate in silver paste becomes evident in that contact resistivity remains low over the broad range of peak firing temperatures, thus providing greater flexibility with respect to the firing temperature required in silicon solar cell applications.

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Section: Resultsmentioning

confidence: 99%

Contact Resistivity Decrease at a Metal/Semiconductor Interface by a Solid-to-Liquid Phase Transitional Metallo-organic Silver

Shin

Seo

Kang

et al. 2014

ACS Appl. Mater. Interfaces

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“…To synthesize the silver oxalate, 2.00 g silver nitrate (!99.0%, Sigma Aldrich) was dissolved in 20 mL milliQ water and added to oxalic acid solution at 60°C. The latter solution was obtained by dissolving 1.48 g oxalic acid dihydrate (99%, Sigma Aldrich) (2:1 M ratio) in 40 mL milliQ water at 60°C [50][51][52]. Silver oxalate started to precipitate immediately, and was obtained after centrifugation and three times washing with milliQ water and once with ethanol.…”

Section: Silver Precursormentioning

confidence: 99%

Preparation and particle size effects of Ag/α-Al2O3 catalysts for ethylene epoxidation

Reijen

Kanungo

Welling

et al. 2017

Journal of Catalysis

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a-AluminaCatalyst design Ethylene oxide Particle size effect a b s t r a c t Currently, for the industrial ethylene epoxidation a-alumina supported silver catalysts are the only catalyst of choice. We demonstrate a novel method to produce these catalysts with different silver particle sizes, but without changing other key parameters that may affect the catalytic performance such as support specific surface area or metal precursor. a-Alumina was impregnated with a silver oxalate solution, and was subsequently dried and treated in different gas atmospheres and at different temperatures to tune the silver particle sizes in the range of 20-500 nm. Particles of 20 nm exhibited a lower turnover frequency than particles of 70 nm and larger, which exhibit a constant turnover frequency, in accordance with results in literature. However, the selectivity, when measured at constant conversion, was particle size independent. This is the first time that the effect of the particle size on the selectivity of ethylene epoxidation is reported at constant conversion. This was made possible by a new method of producing supported silver catalysts, which we expect that is also applicable for silver catalysts with other supports and for the preparation of other supported metal catalysts.

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“…Since the 1970's there have been a number of mechanistic studies of the formation of alkyl radicals through the pyrolytic decarboxylation of silver carboxylates, RCO 2 Ag [20][21][22][23][24], and various R groups have been employed; for example, Karpova et al,studied trifluoroacetates [24]. Fritz and Hiemeyer [25] showed that if trifluoroacetate pyrolysis is carried out in the presence of fullerenes then addition of CF 3 groups to the fullerene cage occurs, and this has been studied in detail more recently [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Novel addition in trifluoromethylation of [70]fullerene

Darwish

Abdul‐Sada

Avent

et al. 2004

Journal of Fluorine Chemistry

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Thermal stability and bonding in the silver complexes of ethylenediaminetetraacetic acid

Cited by 20 publications

References 23 publications

Contact Resistivity Decrease at a Metal/Semiconductor Interface by a Solid-to-Liquid Phase Transitional Metallo-organic Silver

Contact Resistivity Decrease at a Metal/Semiconductor Interface by a Solid-to-Liquid Phase Transitional Metallo-organic Silver

Preparation and particle size effects of Ag/α-Al2O3 catalysts for ethylene epoxidation

Novel addition in trifluoromethylation of [70]fullerene

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