.......
Here are comments from a more recent 2006 article:
"The reaction between silver and nitric acid is of electrochemical nature. Because of considerable conductivity of the metallic layer, there is no
resistance to charge transfer through the solid region. The only remaining resistance is thus related to the NO3- and Ag+ ion transfer through the
aqueous electrolyte that fills the porous region of the solid phase. This resistance is considered by the inter-diffusion coefficient De in the
present system."
Also:
"...further measurements (Fig.2). The extraction rate decreases, for example, by increasing of the size of the particles dissolving in the nitric acid
solution as shown in Fig.2. This result is in obvious contradiction with chemical reaction mechanism reported by previous authors[6]."
Source: S.K. Sadrnezhaad, et al, 'Kinetics of Silver Dissolution in Nitric Acid from Ag-Au0.04-Cu0.10 and Ag-Cu0.23 Scraps', in J. Mater. Sci.
Technol., Vol.22 No.5, 2006. Link to download free pdf at https://www.researchgate.net/publication/259560528_Kinetics_...
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Just found a source article: 'Temperature Dependence of Hydrogen Atom Reaction with Nitrate and Nitrite Species in Aqueous Solution' by Stephen P.
Mezyk
Research Chemistry Branch, AECLWhiteshell Laboratories, published in J. Phys. Chem. A, 1997, 101 (35), pp 6233–6237, DOI: 10.1021/jp970934i. Link:
https://pubs.acs.org/doi/abs/10.1021/jp970934i .
[Edited on 14-12-2018 by AJKOER] |