TY - GEN
T1 - Electrodeposition of iron in aqueous ferrous sulfate solution
T2 - 7th International Symposium on Electrochemistry in Mineral and Metal Processing - 209th Meeting of the Electrochemical Society
AU - Deelo, M.
AU - Weil, K.
AU - Osseo-Asare, K.
PY - 2006
Y1 - 2006
N2 - The role of the ammonium ion during iron deposition in a ferrous sulfate bath was investigated. When cathodic polarizations were performed in a solution of 0.02 M FeSO4 at pH 3, quartz crystal microbalance measurements showed that the presence of ammonium sulfate led to increased mass growth of Fe metal on the cathode surface. The surface pH was measured by placing a flat-bottom electrode behind a stainless steel cathode mesh. Potentiodynamic sweeps generated pH versus potential curves which revealed that in the presence of ammonium sulfate surface pH rose to alkaline levels. These two sets of findings (i.e., mass growth rate of Fe metal and surface pH results) suggest that the ammonium ion enables formation of ferrous ammine species (e.g., Fe(NH3)22+ and Fe(NH3) 42+). This inhibits Fe(OH)2 precipitation on the electrode, a process that can lead to surface passivation, and therefore, limited Fe metal deposition. Copyright The Electrochemical Society.
AB - The role of the ammonium ion during iron deposition in a ferrous sulfate bath was investigated. When cathodic polarizations were performed in a solution of 0.02 M FeSO4 at pH 3, quartz crystal microbalance measurements showed that the presence of ammonium sulfate led to increased mass growth of Fe metal on the cathode surface. The surface pH was measured by placing a flat-bottom electrode behind a stainless steel cathode mesh. Potentiodynamic sweeps generated pH versus potential curves which revealed that in the presence of ammonium sulfate surface pH rose to alkaline levels. These two sets of findings (i.e., mass growth rate of Fe metal and surface pH results) suggest that the ammonium ion enables formation of ferrous ammine species (e.g., Fe(NH3)22+ and Fe(NH3) 42+). This inhibits Fe(OH)2 precipitation on the electrode, a process that can lead to surface passivation, and therefore, limited Fe metal deposition. Copyright The Electrochemical Society.
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M3 - Conference contribution
AN - SCOPUS:33745451649
SN - 1566774403
SN - 9781566774406
T3 - ECS Transactions
SP - 293
EP - 303
BT - Electrochemistry in Mineral and Metal Processing VII
PB - Electrochemical Society Inc.
Y2 - 8 May 2006 through 10 May 2006
ER -