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Three-dimensional hierarchical Pt-Cu superstructures

Three-dimensional hierarchical Pt-Cu superstructures
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摘要 三维(3D ) 层次 Pt-Cu 四角形,高度分叉,并且树枝状的上层建筑被一条灵巧的没有模板的热水的途径综合了,出现生长模式沿着(111, 110 ) ,(111 ) ,并且(100 ) 飞机分别地。这些结构被传播电子显微镜学( TEM )描绘了,X光检查衍射( XRD ),精力散X光检查光谱学( EDX ),诱导地联合的血浆光排放 spectrometry ( ICP-OES )和详细形成机制被开发了,它证明在里面形成的 situ 我<潜水艇class=“ a-plus-plus ”>在 Cu 和磅之间的 2 </sub>和流电的代替反应<啜class=“ a-plus-plus ”>4+</sup>可以指导这些上层建筑的形成。比较 electrocatalytic 性质为甲醇和乙醇氧化被调查了。由于他们的互连的手臂,足够的吸收地点,和暴露的表面,这些上层建筑展览为甲醇和乙醇的电镀物品氧化提高了 electrocatalytic 性能什么时候与商业 Pt/C 和磅黑色相比。 Three-dimensional (3D) hierarchical Pt-Cu tetragonal, highly branched, and dendritic superstructures have been synthesized by a facile template-free hydrothermal approach, showing growth patterns along (111, 110), (111), and (100) planes, respectively. These structures have been characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), inductively coupled plasma optical emission spectrometry (ICP-OES) and a detailed formation mechanism has been developed, which shows that the in situ formed 12 and the galvanic replacement reaction between Cu and Pt4, may guide the formation of these superstructures. The comparative electrocatalytic properties have been investigated for methanol and ethanol oxidation. Due to their interconnected arms, sufficient absorption sites, and exposed surfaces, these superstructures exhibit enhanced electrocatalytic performance for electro-oxidation of methanol and ethanol when compared with commercial Pt/C and Pt black.
作者 Farhat Nosheen Zhicheng Zhang Guolei Xiang Biao Xu Yong Yang Faisal Saleem Xiaobin Xu Jingchao Zhang Xun Wang Farhat Nosheen(1);Zhicheng Zhang(1);Guolei Xiang(1);Biao Xu(1);Yong Yang(1);Faisal Saleem(1);Xiaobin Xu(1);Jingchao Zhang(1);Xun Wang (1);
出处 《纳米研究:英文版》 SCIE CAS CSCD 2015年第3期832-838,共7页 Nano Research
基金 This work was supported by the National Natural Science Foundation of China (Nos. 91127040 and 21221062), and the State Key Project of Fundamental Research for Nanoscience and Nanotechnology (No. 2011CB932402).
关键词 上层建筑 三维 电感耦合等离子体 透射电子显微镜 ICP-OES 光学发射光谱 noble metal,alloy,hierarchical structures,electrocatalysis
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