Breathe easy! No registration or passwords -- nothing to hack.
... and no maddening pop-up, sticky, or floating ads :-)

Home /
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989


Silver plating on carbon for Ag4[Fe(CN)6] dep


Briefly I am attempting to plate nano carbon electrodes with silver that can later be oxidized to silver +1 in the presence of ferrocyanide to form an insoluble precipitate of Ag4[Fe(CN)6] for later use in electrochemical sensors. Unfortunately the only silver sources that I currently have are silver nitrate and silver wire. Based on an earlier thread I gather that silver nitrate cannot be electroplated without cyanide which due to safety regulations were I work is not feasible. Therefore I am wondering if it would be feasible to place a silver wire above the carbon electrode and oxidize the silver wire to form Ag+ and the subsequently reduce the Ag+ to Ag on the carbon. My concern is that oxidizing the silver wire may form some type of silver oxide that is not readily reduced or is insoluble. If you have any suggestions I would appreciate it.

Stephen W. Jones


Hi Stephen. The way to do silver electroplating is from cyanide based silver electroplating solutions, a simple proven process for 100 years now. More than 95 percent of all silver plating is still done from cyanide solutions, and with the present state of the art I would not encourage anyone to move away from this technology. But if your facility absolutely forbids cyanide solutions, you might try the cyanide-free plating silver plating processes of the site's supporting advertiser EPI (Electrochemical Products Inc.) [a supporting advertiser].

Ted Mooney,
Ted Mooney, P.E.
Striving to live Aloha - Pine Beach, New Jersey


Ferrocyanide based electrolyte (1% of potassium cyanide toxicity): 20 gm silver chloride(you can convert nitrate to chloride,add sodium chloride solution to nitrate solution)
40 gm potassium carbonate
40 gm potassium ferrocyanide [affil link]
1 lit water
optionally you can add 8o gm sodium sulphite
stainless steel anodes

pyrophosphate based electrolyte:
25 gm silver pyrophosphate(or nitrate or chloride)
25 gm ammonium carbonate
100 gm potassium pyrophosphate
1 lit water,stainless steel anodes
Hope to help and good luck!

Goran Budija

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

Chemicals &
Consult'g, Train'g
& Software

About/Contact    -    Privacy Policy    -    ©1995-2023, Pine Beach, New Jersey, USA