通过离子束溅射技术（IBS）制备了不同厚度比的PtCu/LaOx-C和LaOx/PtCu-C载体型双层膜电极;采用三电极体系测试了样品的阴极析氢极化曲线,并通过交换电流密度（i0）和分解电势（Ed）的求算结果优选出最优样品;采用XRD分析了最优样品的物相结构信息;采用SEM及EDS研究了各元素的含量分布。结果表明：PtCu层与LaOx层的沉积时间比为5∶5的PtCu/LaOx-C载体型双层膜电极析氢催化性能最优,平衡状态下的分解电势为-0.204（V vs SCE）,交换电流密度达到了147.0μA/cm2;双层结构薄膜中,Cu与Pt形成了合金,而LaOx能降低Pt的晶粒尺寸,并促进Pt（111）择优取向生长。
The supported PtCu/LaOx-C and LaOx/PtCu-C double-layer membrane electrodes with different thickness ratios were prepared by ion beam sputtering（IBS）.The cathodic hydrogen evolution polarization curves of these double-layer membrane electrodes were tested by using a three-electrode system,and the optimal sample was selected by calculating exchange current density～i0） and decomposition voltage～Ed）.Phase structure of the optimal sample was analyzed by X-ray diffractiometry（XRD）.The elemental distribution was analyzed by scanning electron microscopy（SEM） combined with energy dispersive spectrometry（EDS）.The results indicate that the optimal sample is the supported PtCu/LaOx-C double-layer membrane electrode whose deposition time ratio of PtCu-layer to LaOx-layer is 5：5.Its decomposition voltage and exchange current density are-0.204（V vs SCE） and 147.0μA/cm2 respectively under balanced condition.This double-layer structure membrane is shown that Cu has alloyed with Pt,and LaOx can not only decrease grain size of Pt but also contribute to the preferential growth of Pt（111）.
参考文献
| [1] | 邢定峰,俞英,黄海燕.硫化氢间接电解制氢电极材料性能研究[J].中国石油大学学报（自然科学版）,2006(03):126-130,134. |
| [2] | 付银辉,黎学明,杨文静,李武林,任晓虎.Ni-Mo-P活性阴极制备及析氢行为的研究[J].材料导报,2009(22):56-58. |
| [3] | Peter Strasser;Shirlaine Koh;Toyli Anniyev .Lattice-strain control of the activity in dealloyed core-shell fuel cell catalysts[J].Nature Chemistry,2010(6):454-460. |
| [4] | 郑长波,徐惠敏,杨恒,齐曙光.离子束溅射沉积薄膜技术概述[J].实验室科学,2007(04):153-156. |
| [5] | 杨滨,许思勇,张永俐,赵永丰,余英.离子束溅射制备Pt/C催化电极材料的结构和电化学性能[J].贵金属,1999(01):14-19. |
| [6] | Cicero W.B. Bezerra;Lei Zhang;Hansan Liu;Kunchan Lee;Aldalea L.B. Marques;Edmar P. Marques;Haijiang Wang;Jiujun Zhang .A review of heat-treatment effects on activity and stability of PEM fuel cell catalysts for oxygen reduction reaction[J].Journal of Power Sources,2007(2):891-908. |
| [7] | 刘奎仁,陈建设,魏绪钧.钕电解相关物质理论分解电压的计算[J].稀土,2001(02):30-33. |
| [8] | 宗晔,王宇,林昌健.高负载率纳米PtRu/C催化剂的制备和表征[J].物理化学学报,2006(11):1305-1309. |
| [9] | 种法力,陈勇,吴玉程,陈俊凌.La2O3弥散增强钨合金面对等离子体材料及其高热负荷性能[J].材料科学与工程学报,2009(03):415-417,440. |
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