Preparation of Silver Powder used for Solar Cell Paste by Reduction Process

Moudir, N.; Boukennous, Y.; Moulai‐Mostefa, Nadji; Bozetine, I.; Maoudj, M.; Kamel, N.; Kamel, Ziane; Moudir, Dalila

doi:10.1016/j.egypro.2013.07.134

Cited by 25 publications

(18 citation statements)

References 15 publications

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“…XRD analysis confirmed the crystal structures of poly Ag, poly Au, Au2Ag, Au5Ag, and Au10Ag. Figure shows the XRD spectra of each AuAg catalyst, which display the expected diffraction peaks of Au (JCPDS 004-0784) and Ag (JCPDS 004-0783) . These data reveal four peaks assigned to the (111), (200), (220), and (311) planes of the face-centered cubic structure.…”

Section: Resultsmentioning

confidence: 95%

“…Figure 2 shows the XRD spectra of each AuAg catalyst, which display the expected diffraction peaks of Au (JCPDS 004-0784) 31 and Ag (JCPDS 004-0783). 32 These data reveal four peaks assigned to the (111), ( 200), (220), and (311) planes of the face-centered cubic structure. Previous studies have reported that the lattice constants of AuAg bimetallic catalysts are similar to those of monometallic Au and Ag.…”

Section: Resultsmentioning

confidence: 98%

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Enhancing Electrochemical CO₂ Reduction Activity via Charge Transfer and sp-Band Filling in a Au Thin Layer on Ag

Guo

Shim

Jung

et al. 2020

ACS Appl. Energy Mater.

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Producing practical chemical feedstocks via electrochemical CO 2 reduction is a promising technology for carbon recycling and renewable energy storage. To improve CO 2 reduction performance, electrocatalysts with high activity and selectivity must be developed. In this study, Au layers of varying thicknesses were sputtered on polycrystalline Ag catalysts to promote the selective reduction of CO 2 to CO. The results show that a 2 nm Au layer sputtered on polycrystalline Ag exhibited a faradaic efficiency of 83.9% at −0.9 V versus the reversible hydrogen electrode with a current density of 5.93 mA cm −2 . The superior performance of the layered catalyst resulted from the facile charge transfer from Ag to Au, which enhanced the catalytic activity. Furthermore, because the increased electron population in the sp-band resulted in strong CO surface interactions, the layered catalyst exhibited enhanced selectivity for CO production. Thus, this study presents an efficient approach to develop effective layered catalysts for electrochemical CO 2 reduction.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 98%

Enhancing Electrochemical CO₂ Reduction Activity via Charge Transfer and sp-Band Filling in a Au Thin Layer on Ag

Guo

Shim

Jung

et al. 2020

ACS Appl. Energy Mater.

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“…For example, the particles in the form of agglomerates consisted of spherical grains like those shown in Figure 5 are widely used in fabrication of conductive pastes for electronic industry [41]. The particles of dendritic shape have very high surface area and, as such, are widely used in catalysis [42], fabrication of sensors [5], as superhydrophobic surface [24], in surface-enhanced Raman scattering (SERS) [24], as well as in surface-enhanced fluorescence (SEF) [24].…”

Section: Discussionmentioning

confidence: 99%

Comparative Morphological and Crystallographic Analysis of Electrochemically- and Chemically-Produced Silver Powder Particles

Avramović

Pavlović

Maksimović

et al. 2017

Metals

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Silver powders chemically synthesized by reduction with hydrazine and those produced by electrolysis from the basic (nitrate) and complex (ammonium) electrolytes were examined by X-ray diffraction (XRD) and scanning electron microscopic (SEM) analysis of the produced particles. Morphologies of the obtained particles were very different at the macro level. The needle-like dendrites, as well as the mixture of irregular and regular crystals, were formed from the nitrate electrolyte, while the highly-branched pine-like dendrites with clearly noticeable spherical grains were formed from the ammonium electrolyte. The agglomerates of spherical grains were formed by reduction with hydrazine. In the particles obtained from the nitrate electrolyte, Ag crystallites were strongly oriented in the (111) plane. Although morphologies of Ag particles were very different at the macro level, the similarity at the micro level was observed between chemically-synthesized particles and those obtained by electrolysis from the ammonium electrolyte. Both types of particles were constructed from the spherical grains. This similarity at the micro level was accompanied by the similar XRD patterns, which were very close to the Ag standard with a random orientation of Ag crystallites. For the first time, morphologies of powder particles were correlated with their crystal structure.

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“…[7,8]. Similar, ideal silver powder for the conductive pastes is one with non-agglomerated crystalline particles with a narrow size distribution and 1−2 µm or sub-micrometer size [9,10].…”

Section: Introductionmentioning

confidence: 99%

Influence of reducing agents and surfactants on size and shape of silver fine powder particles

Dimitrijević¹,

Kamberović²,

Korać³

et al. 2014

Metall Mater Eng

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Silver fine powder with different shapes and sizes were prepared by chemical reduction and characterized by scanning electron microscope. In this paper was presented the method for the preparation of the fine Ag powder with particles size smaller than 2.5 µm with suitability for the mass-production scale. Reduction was performed from nitrate solution directly by vigorous stirring at room temperature by three different reduction agents, with and without presence of two dispersants. Scanning electron microscopy revealed the preferred size of the particles obtained in all experiments with aim of the protecting agent. Larger particles and wider size distribution were obtained without surfactants although with average size of about 1 µm and small quantity of larger clusters of primary particles that is out of the fine powder classification. High purity, 99.999%, of silver was obtained in every experiment.

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Preparation of Silver Powder used for Solar Cell Paste by Reduction Process

Cited by 25 publications

References 15 publications

Enhancing Electrochemical CO₂ Reduction Activity via Charge Transfer and sp-Band Filling in a Au Thin Layer on Ag

Enhancing Electrochemical CO₂ Reduction Activity via Charge Transfer and sp-Band Filling in a Au Thin Layer on Ag

Comparative Morphological and Crystallographic Analysis of Electrochemically- and Chemically-Produced Silver Powder Particles

Influence of reducing agents and surfactants on size and shape of silver fine powder particles

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Preparation of Silver Powder used for Solar Cell Paste by Reduction Process

Cited by 25 publications

References 15 publications

Enhancing Electrochemical CO2 Reduction Activity via Charge Transfer and sp-Band Filling in a Au Thin Layer on Ag

Enhancing Electrochemical CO2 Reduction Activity via Charge Transfer and sp-Band Filling in a Au Thin Layer on Ag

Comparative Morphological and Crystallographic Analysis of Electrochemically- and Chemically-Produced Silver Powder Particles

Influence of reducing agents and surfactants on size and shape of silver fine powder particles

Contact Info

Product

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Enhancing Electrochemical CO₂ Reduction Activity via Charge Transfer and sp-Band Filling in a Au Thin Layer on Ag

Enhancing Electrochemical CO₂ Reduction Activity via Charge Transfer and sp-Band Filling in a Au Thin Layer on Ag