Electrochemistry and electrocatalysis of polyoxometalate-ordered mesoporous carbon modified electrode.
In this work, we have developed a convenient and efficient method for the functionalization of ordered mesoporous carbon (OMC) using polyoxometalate H6P2Mo18O62 x H2O (P2Mo18). By the method, glassy carbon (GC) electrode modified with P(2)Mo(18) which was immobilized on the channel surface of OMC was prepared and characterized for the first time. The large specific surface area and porous structure of the modified OMC particles result in high heteropolyacid loading, and the P(2)Mo(18) entrapped in this order matrix is stable. Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption-desorption isotherm and X-ray diffraction (XRD) were employed to give insight into the intermolecular interaction between OMC and P(2)Mo(18). The electrochemical behavior of the modified electrode was studied in detail, including pH-dependence, stability and so on. The cyclic voltammetry (CV) and amperometry studies demonstrated that P(2)Mo(18)/OMC/GC electrode has high stability, fast response and good electrocatalytic activity for the reduction of nitrite, bromate, idonate, and hydrogen peroxide. The mechanism of catalysis on P(2)Mo(18)/OMC/GC electrode was discussed. Moreover, the development of our approach for OMC functionalization suggests the potential applications in catalysis, molecular electronics and sensors.
Zhou
Ming
M
Faculty of Chemistry, Northeast Normal University, Changchun 130024, People's Republic of China.
Guo
Li-ping
LP
Lin
Fan-yun
FY
Liu
Hai-xia
HX
D000327:Adsorption; D001959:Bromates / Q000737:chemistry; D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D002623:Chemistry Techniques, Analytical / Q000379:methods; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007452:Iodates / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry; D012044:Regression Analysis; D017550:Spectroscopy, Fourier Transform Infrared; D017973:Tungsten Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction; D000099294:Polyoxometalates
D001959:Bromates; D002244:Carbon; D006861:Hydrogen Peroxide; D007452:Iodates; D009584:Nitrogen; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates