CoFe_(2)O_(4)有序介孔尖晶石氧化物作为氧气还原与氧气析出双功能催化剂的研究

Ordered mesoporous CoFe_(2)O_(4) spinel oxides as an efficient bi-functional electrocatalyst for oxygen reduction and oxygen evolution

本文通过模板法与浸渍烧结法相结合制备出具有三维分级介孔结构的CoFe_(2)O_(4)尖晶石氧化物作为氧气还原与氧气析出反应双功能催化剂。电化学测试表明相比于CoFe_(2)O_(4)纳米颗粒,由于CFO-KIT特殊的三维有序介孔结构不仅能够为电解液、氧气和反应产物提供便利的传输通道,利于催化反应的进行,而且能够有效抑制CoFe_(2)O_(4)晶粒的团聚,从而提高有效催化活性位点数量,CFO-KIT对氧气还原与氧气析出反应表现出更优的催化活性与循环稳定性。

CoFe_(2)O_(4) spinel oxide with three-dimensional mesoporous structure was synthesized by the combination of template method and impregnated sintering method,and used as bifunctional catalyst for oxygen reduction and oxygen evolution reaction.Compared with CoFe_(2)O_(4) nanoparticles,the special three-dimensional ordered mesoporous structure of CFO-KIT can not only facilitate the transport of electrolyte,oxygen and reaction products,but also effectively inhibit the agglomeration of CoFe_(2)O_(4) grains,thus increasing the number of active catalytic sites,CFO-KIT showed better catalytic activity and cycle stability for oxygen reduction and oxygen evolutio.