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Preparation of a Composite Film Electrode Containing 12‐Tungstosilicic Acid and Its Electrocatalytic Reduction for Nitrite
Author(s) -
Liu Shaoqin,
Shi Zhong,
Dong Shaojun
Publication year - 1998
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/(sici)1521-4109(199810)10:13<891::aid-elan891>3.0.co;2-h
Subject(s) - electrochemistry , composite number , nitrite , electrode , electrocatalyst , chemistry , materials science , glassy carbon , inorganic chemistry , ionic bonding , cyclic voltammetry , organic chemistry , ion , composite material , nitrate
A novel organic‐inorganic composite film was formed by attaching Keggin‐type heteropolyanion, SiW 12 O 40 4− (devoted briefly as SiW 12 ), on a glassy carbon electrode derivatized by 4‐aminophenyl group. The composite film has an ionic bonding character between SiW 12 and the surface amino group, which greatly improves the film stability and exhibits a more reversible electrochemical behavior. The modified electrode offers an excellent and stable electrocatalytic response for the reduction of nitrite. Possible mechanism was provided for the reaction of nitrite with SiW 12 O 40 4− /aminophenyl composite film.