Application of a Nanostructured Composite Material Constructed by Self-Assembly of Titanoniobate Nanosheets and Cobalt Porphyrin to Electrocatalytic Reduction of Oxygen

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• 作者：Jinpeng Li ; Xiaobo Zhang ; Binbin Pan ; Jiasheng Xu ; Lin Liu ; Juanjuan Ma ; Min Yang ; Zhenye Zhang and Zhiwei Tong
• 刊名：Chinese Journal of Chemistry
• 出版年：2016
• 出版时间：October, 2016
• 年：2016
• 卷：34
• 期：10
• 页码：1021-1026
• 全文大小：2836K
• ISSN：1614-7065

文摘

A novel layered nanocomposite was fabricated by the self-assembly of TiNbO₅-nanosheets and 5,10,15,20-tetrakis(N-methylpyridinium-4-yl)porphyrinatocobalt(III) (CoTMPyP). The product was characterized by a variety of analytical techniques such as XRD, EDX, Zeta potential, AFM, UV-vis, IR and SEM, the guest species were intercalated into the interlayer gallery of KTiNbO₅ successfully. The electrochemical property of TiNbO₅-CoTMPyP as an electrode modifying material was examined by cyclic voltammetry test in PBS solution (pH=7), and the hybrid exhibited excellent electrocatalytical property towards oxygen reduction with the peak potential shifting from −0.703 V (bare GCE) to −0.278 V (modified electrode). The result also indicated that the oxygen molecule was reduced to H₂O₂ by a two-electron process.