Modified Ti meshes used as anode collector layer of solid polymer electrolyte ( SPE ) electrolyzer were prepared through Adams fusion method. The Ti mesh modification synchronized with IrO2 preparation. The physico-chemical properties of the modified Ti meshes and IrO2 catalyst were studied by scanning electron microscopy( SEM) , X-ray diffraction( XRD) and transmission electron microscopy( TEM) . An IrO2 layer was formed onto the Ti mesh' s surface and the size of anode catalyst IrO2 was in nanoscale. The SPE electrolyzer employing modified Ti mesh showed a higher performance due to the extension of three-phase activity sites from catalyst layer to diffusion layer. 100 mesh Ti mesh showed lower Rct and better catalyst loadings compared with 50 mesh one, and owned a good durability as well. Ti meshes with different catalyst loadings were tested and the Ti mesh with 1. 38%( mass fraction) catalyst loading exhibited the best performance, which yielded a potential of 2. 028 V at a current density of 1 A/cm2 .%采用亚当斯熔融法( Adams fusion method)在钛网上包覆IrO2催化剂,并将其用作固体聚合物电解质( SPE)电解器的阳极集电极,发现其可以显著降低电解过电位.通过X射线多晶衍射( XRD)和透射电子显微镜( TEM)分析发现,包裹在钛网上的IrO2催化剂晶粒为2.0~3.0 nm,结晶度良好；交流阻抗谱( EIS)和循环伏安( CV)分析结果表明,改性的钛网集电极层可增加三相反应活性点,使三相反应通道由催化层延伸到集电极层,活性催化剂表面积增大,从而大幅度降低了活化阻抗,电解性能获得提升.通过对不同IrO2催化剂负载量改性的钛网进行研究发现,随着钛网负载IrO2量的增加,在相同电流密度下,极化曲线的过电位先减小后增加,当IrO2负载量为1.38%(质量分数)时,电解池的过电位最低,在1 A/cm2电流密度下,过电位为2.028 V.
展开▼
