Preparation and Reconstruction of Long Branched Palladium Nanowires Exhibiting High Catalytic Activities
Preparation and Reconstruction of Long Branched Palladium Nanowires Exhibiting High Catalytic Activities
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DOI：
10.1002/slct.201803487
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发表时间：
2018-12
期刊：
影响因子：
2.1
通讯作者：
Y. Imura;Hiroki Kataoka;R. Akiyama;Clara Morita-Imura;T. Kawai
中科院分区：
文献类型：
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作者：
Y. Imura;Hiroki Kataoka;R. Akiyama;Clara Morita-Imura;T. Kawai
通过聚集方法制备的贵金属纳米线由于其高催化活性而特别有吸引力。然而，纳米线的催化活性往往是较低的，由于形态变化和沉淀。为了解决这个问题，我们在此描述了一种新的方法，用于构建长的分支Pd纳米线，其表现出比短的Pd纳米线和球形Pd纳米颗粒更高的催化活性。然而，我们发现，静置10 d后，由于纳米线长度的减少和Pd沉淀的形成，催化活性降低。因此，我们随后证明了通过使用I-/O2作为蚀刻剂和NaBH 4作为还原剂的溶液进行蚀刻和重建，成功地恢复了催化活性。
Noble metal nanowires prepared by aggregation methods are particularly attractive due to their high catalytic activities. However, the catalytic activities of nanowires tend to be lower due to morphological changes and precipitation. To address this issue, we herein describe a novel method for the construction of long branched Pd nanowires exhibiting a higher catalytic activity than either short Pd nanowires and spherical Pd nanoparticles. However, we found that after standing for 10 d, the catalytic activity was reduced due to a decrease in the nanowire length and the formation of Pd precipitates. Thus, we subsequently demonstrated successful recovery of the catalytic activity by etching and reconstruction using a solution of I−/O2as the etchant and NaBH4as the reducing agent.