Nucleation and growth kinetics of Ag7NO11 on a platinum single crystal electrode

Michailova, E.; Milchev, A.

doi:10.1007/bf01022259

Cited by 25 publications

(19 citation statements)

References 6 publications

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“…Fig. 2 a Ag 7 NO 11 crystals [13] and b copper crystals [14] electrochemically deposited on a mechanically polished glassy carbon electrode. Magnification 500X The considerations performed thus far clearly show that the supersaturation dependence of the stationary nucleation rate I st can be schematically presented by the line shown in Fig.…”

Section: Atomistic Nucleation Theorymentioning

confidence: 99%

Nucleation phenomena in electrochemical systems: kinetic models

Milchev

2016

ChemTexts

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The classical thermodynamics allow deriving theoretical expressions for the nucleation work and for the size of the critical nuclei in a supersaturated system. However, information on the rate of nucleus formation should be determined by means of kinetic considerations. This article sheds light on the nucleation kinetics in electrochemical systems at a constant thermodynamic supersaturation Dl. Theoretical expressions are derived for the stationary and non-stationary nucleation rate.

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Section: Atomistic Nucleation Theorymentioning

confidence: 99%

Nucleation phenomena in electrochemical systems: kinetic models

Milchev

2016

ChemTexts

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“…When an anode deposit is formed, silver can oxi dize to valences higher than Ag(I) [6,7], which was confirmed by a spectral method [8].…”

mentioning

confidence: 67%

“…The deposits formed on anode were identified as Ag 7 [3]. For a nitric acid medium, the following formula has been proposed:…”

mentioning

confidence: 99%

Physicochemical investigation of anodic processes involved in silver electrowinning in refining technology

Lebed¹,

Zaikov

Potapov

et al. 2013

Russ. J. Inorg. Chem.

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“…Ag 7 O 8 NO 3 is a mixed‐valence compound formed from Ag + , Ag 2+ , and Ag 3+ ions . Previous studies have investigated the formation mechanism of anodically deposited Ag 7 O 8 NO 3 structures . Briefly, Ag + ions are first oxidized into Ag 2+ and Ag 3+ ions near the anode electrode surface.…”

mentioning

confidence: 99%

“…The nucleation and growth kinetics of Ag 7 O 8 NO 3 during anodic deposition have been studied previously, which are highly dependent on the overpotential. Similar to wet chemical synthesis, the morphology evolution of the Ag 7 O 8 NO 3 structures at different deposition conditions depends on the ratio of the growth rate between different crystal planes .…”

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confidence: 99%

Electrocarving during Electrodeposition Growth

Wang

Zhao

et al. 2018

Advanced Materials

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Controllable synthesis of micro/nanomaterials with unique structures has been a central focus of materials scientists and chemists as structure determines material properties. Wet chemical methods have been extensively explored to fabricate metal, [1][2][3][4][5][6][7] semiconductor, [8] upconversion, [9,10] and organic [11,12] nanoparticle colloids with controllable structures. Recently, controllable etching has been employed to carve nanoparticles as they are being synthesized by wet chemical methods into well-defined morphologies. [13][14][15][16] Noteworthy, the manipulation of controllable etching during wet chemical growth allows for the preparation of very unique structures of high complexity (e.g., single-and doublewalled open nanoboxes). [17] Compared with wet chemical methods, electrochemical deposition (ECD) can fabricate micro/ nanostructures affixed to a substrate, [18][19][20][21][22][23][24][25] facilitating subsequent applications where nanoparticle colloids cannot be applied. However, shape-and size-controlled synthesis of micro/nanostructures using ECD has remained extremely challenging and has barely been explored. Inspired by the advantages of wet chemical methods to control the growth/etching of nanocrystals, we have investigated the electrochemical design of micro/nanostructures by manipulating the electrocarving process during electrodeposition growth (MEDEG). Silver-oxide clathrate (Ag 7 , etc.) has many interesting properties due to the unique clathrate-type structure which consists of Ag 6 O 8 cages that enclose X anions. [26,27] However, it is extremely challenging to controllably fabricate silver-oxide clathrate using existing approaches. [26][27][28][29][30] We start with the ECD of oxysilver nitrate (Ag 7 O 8 NO 3 , an important inorganic clathrate-type structure) as a model to reveal that controllable electrocarving of the electrodeposited micro/nanostructures can be achieved during electrodeposition growth. This top-down electrocarving process is then harnessed to sculpt Ag 7 O 8 NO 3 structures in real-time during electrodeposition growth. The electrocarving process is driven by the change in pH value during electrodeposition, as verified by both our experimental and simulation results. The electrocarving and the electrodeposition growth rates can be manipulated by adjusting the deposition voltage and/or the composition of the electrolyte, which allows us to prepare Ag 7 O 8 NO 3 particles with extremely complex structures. The sculpted Ag 7 O 8 NO 3 micro/nanostructures Shape-and size-controlled synthesis of micro/nanostructures is of fundamental importance in many applications of physics and chemistry. Wet chemical growth methods have achieved shape-and size-controlled synthesis of colloidal nanocrystals of various compositions. Compared with wet chemical methods, electrochemical deposition (ECD) yields micro/nanostructures affixed to a substrate, but the resulting structures are poorly controlled. Herein, the controllable electrochemical fabrication of well-defined silver-oxid...

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Nucleation and growth kinetics of Ag7NO11 on a platinum single crystal electrode

Cited by 25 publications

References 6 publications

Nucleation phenomena in electrochemical systems: kinetic models

Nucleation phenomena in electrochemical systems: kinetic models

Physicochemical investigation of anodic processes involved in silver electrowinning in refining technology

Electrocarving during Electrodeposition Growth

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