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首页> 外文期刊>Electrochimica Acta >ITO electrode modified by self-assembling multilayer film of polyoxometallate on poly(vinyl alcohol) nanofibers and its electrocatalytic behavior
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ITO electrode modified by self-assembling multilayer film of polyoxometallate on poly(vinyl alcohol) nanofibers and its electrocatalytic behavior

机译：在聚乙烯醇纳米纤维上自组装多金属氧酸盐多层膜修饰的ITO电极及其电催化性能

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摘要

Poly(vinyl alcohol) (PVA) nanofiber mats were collected on indium tin oxide (ITO) substrate by electrospinning method. A multilayer film composed of α-[P{sub}2W{sub}18O{sub}62]{sup}(6-) (abbr. P{sub}2W{sub}18), a polyoxometallate (POM) anion, and po ly(diallymethylammonium chloride) (abbr. PDDA) was fabricated by layer-by-layer (LBL) self-assembly technique on the PVA/ITO electrode. The PDDA/P{sub}2W{sub}18 multilayer film could be unselectively or selectively deposited on the PVA/ITO electrode via changing the amount of PVA nanofibers on the ITO substrate. The scanning electron microscope (SEM) images showed that when the electrospun time was short the PDDA/P{sub}2W{sub}18 multilayer film was unselectively deposited on PVA nanofiber mats because the amount of PVA nanofibers was too little to cover most of the ITO substrate. However, when the electrospun time was long enough, the PDDA/P{sub}2W{sub}18 multilayer film was selectively deposited on PVA nanofiber mats because of the larger surface area and higher surface energy of PVA nanofibers in comparison with the flat ITO substrate. Growth process of the multilayer film was determined by cyclic voltammetry (CV). Electrocatalytic effects of the PDDA/P{sub}2W{sub}18 multilayer film unselectively and selectively deposited on the PVA/ITO electrode on (NO{sub}2){sup}- were observed.
机译：聚乙烯醇（PVA）纳米纤维垫通过静电纺丝法收集在氧化铟锡（ITO）基底上。由α-[P {sub} 2W {sub} 18O {sub} 62] {sup}（6-）（简称P {sub} 2W {sub} 18），多金属氧酸盐（POM）阴离子组成的多层膜，然后在PVA / ITO电极上通过逐层（LBL）自组装技术制备了聚（二烯丙基甲基氯化铵）（简称PDDA）。可以通过改变ITO基板上的PVA纳米纤维的数量将PDDA / P {sub} 2W {sub} 18多层膜非选择性或选择性地沉积在PVA / ITO电极上。扫描电子显微镜（SEM）图像显示，当电纺时间短时，PDDA / P {sub} 2W {sub} 18多层膜非选择性沉积在PVA纳米纤维垫上，因为PVA纳米纤维的量太少，无法覆盖大部分ITO基板。然而，当电纺时间足够长时，PDVA / P {sub} 2W {sub} 18多层膜选择性地沉积在PVA纳米纤维垫上，因为与平面ITO相比，PVA纳米纤维的表面积更大，表面能更高。基质。通过循环伏安法（CV）确定多层膜的生长过程。观察到PDDA / P {sub} 2W {sub} 18多层薄膜非选择性地和选择性地沉积在（NO {sub} 2）{sup}-上的PVA / ITO电极上的电催化作用。

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