钒取代Keggin型杂多酸的多层组装和电催化性能研究

Layer-by-layer Assemblies Consisting of Vandium-substituted Keggin Type Heteropolytungstate Anions and Their Electrocatalytic Behavior

用层层组装的方法在 4 -氨基苯甲酸预修饰的玻碳电极上交替沉积过渡金属钒取代的杂多酸H3 PW6V6O6- 4 0 (简称 PW6V6)和联吡啶锇取代的聚乙烯吡啶 (QPVP-Os) .用表面等离子体共振 (SPR)技术和循环伏安 (CV)法对多层膜进行了表征 .结果表明 ,多层膜的生长均匀 ,平均厚度为 2 .88nm.还研究了多层膜对亚硝酸根 (NO- 2 )和溴酸根 (Br O- 3 )的催化还原活性 .

Vanadium-substituted heteropolytungstate anions(H 3PW 6V 6O 6- 40, denoted as PW 6V 6)-containing multilayer films have been fabricated on the 4-aminobenzoic acid(4-ABA) modified GCE surface by alternating deposition with a quaternized poly(4-vinylpyridine) partially complexed with osmium bis(2,2-bipyridine)(denoted as QPVP-Os). Surface plasmon resonance(SPR) spectroscopy and cyclic voltammetry(CV) have been used to characterize the growing behavior of the as-prepared multilayer films. It is shown that the multilayer films are uniform. The average thickness for a bilayer of QPVP-Os/PW 6V 6 in the multilayer films is 2.88 nm. The electrocatalytic activities of the multilayer films for the reduction of BrO - 3 and NO - 2 have been investigated.