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Citation: WU Ping, CAI Chen-Xin, LU Tian-Hong. Fabrication, Characterization and Electrocatalysis of Samarium Hexacyanoferrate Modified Electrode[J]. Chinese Journal of Applied Chemistry, ;2004, 21(11): 1101-1104. shu

Fabrication, Characterization and Electrocatalysis of Samarium Hexacyanoferrate Modified Electrode

WU Ping ^a ,
CAI Chen-Xin ^a,, ,
LU Tian-Hong ^a,b

1.
a Department of Chemistry, Nanjing Normal University, Nanjing 210097;
2.
b Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun

Corresponding author: CAI Chen-Xin,
Received Date: 29 December 2003
Available Online: 9 May 2004
Fund Project: 国家自然科学基金(20373027) (20373027)江苏省高校自然科学基金(03KJA150055) (03KJA150055)

A new electroactive polynuclear inorganic compound of rare earth metal hexacyanoferrate, samarium hexacyanoferrate(SmHCF), was prepared by electrochemical deposition of SmHCF on the surface of a glassy carbon electrode via a potential cycling procedure. The result of SEM indicates that SmHCF was adhered on the surface of the electrode in the form of particles, the average size of SmHCF was about (11.3±1.3) μm. In FTIR spectrum of SmHCF a very strong and sharp peak at 2 061.5 cm^-1 corresponding to the stretching vibration of the C-N group in the SmHCF was observed. The cyclic voltammetric results indicate SmHCF/GC electrode exhibited a pair of well defined and nearly symmetrical redox peaks. The anodic and cathodic peak potentials were 207 mV and 171 mV, respectively, and the formal potential(E^0') was 189 mV at a scan rate of 20 mV/s. The redox peak shifted in the positive direction with the increasing of the concentration of supporting electrolyte and the formal potential increased linearly with the concentration of supporting electrolyte(log c) with a slope of 50.4 mV. The experimental results indicate that SmHCF modified GC electrode showed an electrocatalytic activity in the oxidation of dopamine(DA), the electrocatalytic current increased with the increasing of the concentration of DA. In the range of 1.0 to 15.0 mmol/L, the electro-catalytic current increased linearly with the concentration.
- samarium hexacyanoferrate,
- dopamine,
- chemically modified electrode,
- electrocatalysis
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