Two new inorganic-organic hybrids based on Keggin polyoxometalate and methylene blue and application in chemically bulk-modified electrode

详细信息    查看全文

• 作者：Ganglin Xue ; ^{xglin707@163.com} ; Jun Xiong ; Huilin Guo ; Guolei Cao ; Sansan Nie ; Huaiming Hu
• 关键词：Polyoxometalate ; Charge-transfer salts ; Carbon paste electrode ; Electrochemistry ; Electrocatalysis
• 刊名：Electrochimica Acta
• 出版年：2012
• 出版时间：1 May, 2012
• 年：2012
• 卷：69
• 期：Complete
• 页码：315-319
• 全文大小：699 K

文摘

Two new inorganic-organic hybrids based on Keggin polyoxometalate and methylene blue (MB), [C₁₆H₁₈N₃S]₄[PMo₁₂O₄₀]¡¤2DMF¡¤H₂O (1) and [C₁₆H₁₈N₃S]₄[GeMo₁₂O₄₀]¡¤2DMF¡¤H₂O (2), were synthesized and characterized. X-ray diffraction analysis shows that the organic layers composed of the parallel MB cations and the inorganic layers of discrete Keggin polyoxoanions are alternatively arranged, and UV-vis diffuse reflectance spectra in the solid state indicate the presence of new bands attributed to charge-transfer transitions between the organic dye donors and polyoxometalate acceptors. The two charge-transfer salts 1-2 were used as a solid bulk modifier to fabricate a three-dimensional bulk-modified carbon paste electrode (1-CPE and 2-CPE). The results show that both 1-CPE and 2-CPE present stability and have good electrocatalytic activities toward the reduction of chlorate, bromate and nitrite.