Assembly of hybrids based on polyoxotungstates and Co-tris(imidazolyl) complexes with bifunctional electrocatalytic activities

作者：Zhou, Wanli; Peng, Jun^*; Zhang, Zheyu; Shi, Zhenyu; Khan, Shifa Ullah; Liu, Hongsheng

来源：RSC Advances, 2015, 5(45): 35753-35759.

DOI：10.1039/c5ra01165e

• BOND-VALENCE PARAMETERS
• ELECTROCHEMICAL PROPERTIES
• POLYOXOMETALATE CLUSTERS
• CRYSTAL-STRUCTURES
• HELICAL CHANNELS
• BUILDING-BLOCKS
• COORDINATION
• LIGAND
• OXIDATION
• NANOSCALE

Three new organic-inorganic hybrid compounds based on the Keggin polyoxometalates, [Co-2(tib)(2)(H2O)(4)(alpha-HBW12O40)]center dot 6H(2)O (1), [Co-2(tib)(2)(H2O)(4)(alpha-SiW12O40)]center dot 4H(2)O (2) and [Co(H(2)tib)(4)(alpha-BW12O40)(2)]center dot 8H(2)O (3) (tib = 1,3,5-tris(1-imidazoly)benzene), were hydrothermally synthesized by utilizing a pH-dependent approach in the same POM/Co/tib reaction systems. X- ray structural analyses reveal that isostructural compounds 1 and 2, obtained at pH 3.6, have a (3,4)-connected 2D net with the (4(2) 6)(4(2) 6(3) 8) topology; compound 3, isolated at pH 4.8, is a "butterfly-like" structure stemming from alpha-BW12 polyoxoanions and Co-tib motifs. In addition, the electrocatalytic properties of compounds 1-3 were studied by cyclic voltammetry. Compounds 1-3 displayed bifunctional electrocatalytic activities toward reduction of nitrite and oxidation of ascorbic acid.

• 出版日期2015
• 单位大庆师范学院; 东北师范大学; 通化师范学院