Morphological Stability and Catalytic Performance of Supported and Unsupported Dendritic Gold Nanowire Catalysts
Morphological Stability and Catalytic Performance of Supported and Unsupported Dendritic Gold Nanowire Catalysts
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DOI：
10.1002/slct.201902594
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发表时间：
2019-09
期刊：
影响因子：
2.1
通讯作者：
Y. Imura;Hiroki Kataoka;Haruna Saito;Muneharu Minakawa;Clara Morita-Imura;T. Kawai
中科院分区：
文献类型：
--
作者：
Y. Imura;Hiroki Kataoka;Haruna Saito;Muneharu Minakawa;Clara Morita-Imura;T. Kawai
形状可控的贵金属纳米晶体，如纳米花和纳米线，作为具有优异催化性能的纳米催化剂非常有吸引力。因此，研究和改善形状控制纳米晶体的形态稳定性和催化性能是非常重要的。该研究表明，树枝状Au纳米线具有较高的催化活性相比，球形Au纳米粒子，虽然树枝状Au纳米线的催化活性下降后，在水溶液中放置16天，由于其形态的变化。 以负载型Au纳米粒子为晶种，采用种子生长法制备了氧化铝负载的树枝状Au纳米线粉末。干燥的负载树枝状Au纳米线在空气中放置16天后，其催化活性和形貌没有变化。
Shape‐controlled noble metal nanocrystals, such as nanoflowers and nanowires, are very attractive as nanocatalysts with excellent catalytic performance. Therefore, it is important to examine and improve the morphological stability and catalytic performance of shape‐controlled nanocrystals. This study showed that dendritic Au nanowires have a high catalytic activity compared with spherical Au nanoparticles, although the catalytic activity of the dendritic Au nanowires decreased after standing in aqueous solution for 16 days due to changes in their morphology. We prepared alumina‐supported dendritic Au nanowire powder by a seed growth method using supported Au nanoparticles as seed materials. The catalytic activity and morphology of the dried, supported dendritic Au nanowires did not change after standing for 16 days in air.