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yinjuanchen

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Originally posted by huikityy at 2011-05-12 12:33:44:
The electrochemical behaviour of silver nanoparticles in
water solution was also analysed. Stripping voltammetry of
silver nanoparticles, in dissolution in an electrolyte solution,
was carried o ...

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Mally89(½ð±Ò+1): лл½»Á÷£¡~ 2011-05-12 19:11:49
huikityy(½ð±Ò+20, ·­ÒëEPI+1): 2011-05-12 20:09:16
The electrochemical behaviour of silver nanoparticles in water solution was also analysed. Stripping voltammetry of silver nanoparticles, in dissolution in an electrolyte solution,was carried out using a 25 µmdiameter platinum ultramicroelectrode. To detect silver (I) electrochemically at low concentrations, it is necessary to electrodeposit silver onto  the electrode surface in a pre-concentration step by holding the potential of the electrode at −0.3Vversus for 60 s [18]. This procedure reduces Ag+ to Ag0,which plates onto the electrode surface. When the potential is swept positively from −0.3to+0.35 V, the deposited silver is oxidized to Ag+ and stripped from the electrode, giving a characteristic stripping peak with a
height proportional to the concentration of Ag+ in the solution.
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Mally89(½ð±Ò+1): ¸Ðл½»Á÷£¡~ 2011-05-17 21:50:01
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