论文部分内容阅读
用热分解法制备Ti/Pd2Sn+Pd O和Ti/Pd电极。采用高分辨率透射电子显微镜、能量散射谱仪、选区电子衍射对催化剂进行表征。利用循环伏安法和计时电流法研究了所制备催化剂的催化活性和稳定性。结果表明,Ti/Pd2Sn+Pd O电极比Ti/Pd电极具有更高的甲酸催化活性(约2.4倍)。Ti/Pd2Sn+Pd O电极在0.3 V(vs SCE)下测试500 s后电流密度仅衰减25%,具有比Ti/Pd电极更好的稳定性。Ti/Pd2Sn+Pd O电极显著提高了催化活性和稳定性,为Pd基直接甲酸燃料电池催化剂的应用提供可行方案。
Ti / Pd2Sn + PdO and Ti / Pd electrodes were prepared by thermal decomposition. The catalysts were characterized by high resolution transmission electron microscopy, energy dispersive spectroscopy and selected area electron diffraction. The catalytic activity and stability of the prepared catalyst were studied by cyclic voltammetry and chronoamperometry. The results show that Ti / Pd2Sn + PdO electrode has higher formic acid catalytic activity (about 2.4 times) than Ti / Pd electrode. The current density of Ti / Pd2Sn + PdO electrode attenuates only 25% after 500 s test at 0.3 V (vs SCE), which shows better stability than Ti / Pd electrode. Ti / Pd2Sn + PdO electrode significantly improves the catalytic activity and stability, and provides a feasible solution for the application of Pd-based direct formic acid fuel cell catalyst.