TiO_(2)/磷化钴复合纳米电极的制备及电催化性能研究

Synthesis and electrocatalytic performance of TiO_(2)/CoP nanocomposite electrode

通过电化学阳极氧化和电化学沉积相结合的方法制备了TiO_(2)纳米管阵列/磷化钴复合纳米电极(TiO_(2)NTs/CoP)。采用X射线衍射仪(XRD)和场发射扫描电子显微镜(FESEM)对复合电极的结构和形貌进行了表征,并利用极化曲线技术测试了其在1mol/L KOH溶液中对电解水析氢反应(HER)和析氧反应(OER)的催化性能。结果表明:在电催化析氢和析氧反应中,该电极在10mA/cm^(2)电流密度下的过电位分别112mV和320mV,与其他电极相比具有良好的电催化活性,可以作为电解水反应的双功能电催化剂。

TiO_(2) NTs/CoP nanocomposite electrode was successfully prepared by combination of electrochemical anodization and electrodeposition.The structure and morphology of the composite electrode were characterized by X-ray diffractometer(XRD)and field emission scanning electron microscope(FESEM).The electrocatalytic performance of the composite electrode for the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in 1 mol/L KOH solution was tested by polarization curve technique.The results indicated that the overpotential of the TiO_(2) NTS/CoP was 112 mV for HER and 320 mV for OER at the current density of 10 mA·cm-2,respectively.Compared with other electrodes,the TiO_(2) NTS/CoP had good electrocatalytic performance,and could be used as bifunctional electrocatalyst for water electrolysis.