TY - JOUR
T1 - An EQCM investigation of electrochemical precipitation of Mn (OH) 2 and its capacitance behavior
AU - Nayak, Prasant Kumar
AU - Devaraj, S.
AU - Munichandraiah, N.
PY - 2010
Y1 - 2010
N2 - Electrochemical quartz crystal microbalance (EQCM) has been used to study the electrochemical precipitation of Mn (OH) 2 on a Au crystal and its capacitance properties. From the EQCM data, it is inferred that NO 3- ions get adsorbed on the Au crystal and then undergo reduction, resulting in an increase in pH near the electrode surface. Precipitation of Mn2+ occurs as Mn (OH) 2, with an increase in mass of the Au crystal. Mn (OH) 2 undergoes oxidation to MnO2, which exhibits electrochemical supercapacitor behavior on subjecting to electrochemical cycling in a Na2 SO4 electrolyte. EQCM data indicate mass variations corresponding to surface insertion/extraction of Na+ ions during discharge/charge cycling.
AB - Electrochemical quartz crystal microbalance (EQCM) has been used to study the electrochemical precipitation of Mn (OH) 2 on a Au crystal and its capacitance properties. From the EQCM data, it is inferred that NO 3- ions get adsorbed on the Au crystal and then undergo reduction, resulting in an increase in pH near the electrode surface. Precipitation of Mn2+ occurs as Mn (OH) 2, with an increase in mass of the Au crystal. Mn (OH) 2 undergoes oxidation to MnO2, which exhibits electrochemical supercapacitor behavior on subjecting to electrochemical cycling in a Na2 SO4 electrolyte. EQCM data indicate mass variations corresponding to surface insertion/extraction of Na+ ions during discharge/charge cycling.
UR - http://www.scopus.com/inward/record.url?scp=77956571064&partnerID=8YFLogxK
U2 - 10.1149/1.3479665
DO - 10.1149/1.3479665
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AN - SCOPUS:77956571064
SN - 1099-0062
VL - 13
SP - F29-F32
JO - Electrochemical and Solid-State Letters
JF - Electrochemical and Solid-State Letters
IS - 11
ER -