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PMo 12 ‐Doped Carbon Ceramic Composite Electrode Based on Sol‐Gel Chemistry and Its Electrocatalytic Reduction of Bromate
Author(s) -
Wang Peng,
Wang Xiangping,
Zhu Guoyi
Publication year - 2000
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200012)12:18<1493::aid-elan1493>3.0.co;2-r
Subject(s) - bromate , composite number , electrode , ceramic , carbon fibers , reduction (mathematics) , doping , inorganic chemistry , chemistry , materials science , chemical engineering , metallurgy , composite material , optoelectronics , mathematics , engineering , bromide , geometry
A conductive carbon ceramic composite electrode (CCE) comprised of α‐type 1:12 phosphomolybdic acid (PMo 12 ) and carbon powder in an organically modified silicate matrix was fabricated using a sol‐gel method and characterized by scanning electron microscopy, cyclic voltammetry, and Osteryoung square‐wave voltammetry. Osteryoung square‐wave voltammograms of the modified electrode immersed in different acidic aqueous solutions present the dependence of current and redox potential on pH. The PMo 12 ‐doped CCE shows more reversible reaction kinetics, good stability and reproducibility, especially the renewal repeatability by simple polishing in the event of surface fouling or dopant leaching. Moreover, the modified electrode shows good catalytic activity for the electrochemical reduction of bromate.