电镀法制备Pt/TiO_(2)纳米管电极及其电催化析氢性能

Pt/TiO_(2) Nanotubes Electrode:Preparation by Electroplating Method and Electrocatalytic Hydrogen Evolution Performance

采用阳极氧化法制备得到锐钛矿型二氧化钛(TiO_(2))纳米管阵列,在其表面通过电镀法沉积Pt,得到了低铂的Pt/TiO_(2)纳米管电极(Pt/TiO_(2)‑NTs)。通过扫描电子显微镜和透射电子显微镜对其进行形貌表征后发现,Pt较为均匀地分布于TiO_(2)纳米管阵列中。进一步的电催化析氢结果表明,Pb/TiO_(2)‑NTs在10 mA·cm^(-2)时,过电位为0.079 V,塔菲尔斜率为42.7 mV·dec-1,较Pt/TiO_(2)致密膜电极(Pt/TiO_(2)‑F)以及商业Pt/C催化剂显示了更为优异的催化活性。同时,在长循环稳定性测试(3000个周期)中,Pb/TiO_(2)‑NTs相较于上述2种对比电极显示了更为优异的稳定性。

Here,Pt modified anatase‑type titanium dioxide(TiO_(2))nanotube arrays were prepared by electroplating method for a low‑platinum Pt/TiO_(2) nanotubes electrode(Pt/TiO_(2)‑NTs).By contrast,we fixed Pt on TiO_(2) dense film by the same procedure as a control sample(Pt/TiO_(2)‑F).The scanning electron microscopy and transmission electron microscopy observation showed that Pt nanoparticles were distributed uniformly in nanotube arrays,and Pt/TiO_(2)‑NTs showed a higher efficiency in electrocatalytic hydrogen evolution compared with Pt/TiO_(2)‑F and commercial Pt/C catalyst,in which the overpotential of Pt/TiO_(2)‑NTs was 0.079 V,the Tafel slope was 42.7 mV·dec-1 at 10 mA·cm^(-2).The catalytic activity of 3000 cycles duration stability test results showed that Pt/TiO_(2)‑NTs exhibited excellent stability compared with the above contrast electrodes.