稀土元素铈对铂铜复合膜电极结构及性能的影响

通过离子束溅射技术分别制备铂铜复合膜电极及掺杂铈元素的铂铜复合膜电极,并在相同条件下对膜电极进行热处理及酸蚀处理。通过高分辨透射电镜、X射线衍射及电化学性能测试对膜电极进行结构及性能的研究。结果表明,在相同后处理条件下,铈元素的添加使铂铜复合膜电极表面出现"桥连"结构,同时促进铂铜元素的合金化程度增强,与纯Pt相比膜电极的析氢交换电流密度提升92.25%。

Effect of Ce on the structure and properties of PtCu composite membrane electrodes

All the membrane electrodes were prepared by ion beam sputtering (IBS) apparatus. Vacuum annealing in combination with acid etching was used as post-processing. The high resolution transmission electron microscopy and X-ray diffraction were employed to investigate the surface morphology and alloying degree of samples. The electrochemical performance was used to detect hydrogen evolution property. The result confirmed that, with the same condition of post-processing, the membrane electrode doped Ce had cross-bridged structure and higher alloying degree,and the electrochemical performance was enhanced by 92.25% compared to pure Pt.