Morphological Stability and Catalytic Performance of Supported and Unsupported Dendritic Gold Nanowire Catalysts. Issue 34 (9th September 2019)

• Record Type: Journal Article
• Authors: Imura, Yoshiro; Kataoka, Hiroki; Saito, Haruna; Minakawa, Muneharu; Morita‐Imura, Clara; Kawai, Takeshi
• Is Part Of: ChemistrySelect. Volume 4:Issue 34(2019)
• Page Start: 9908
• Page End: 9914
• Publication Date: 2019-09-09
• Subjects: Gold -- Nanostructure -- Nanowire -- Seed growth -- Supported material; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201902594
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: 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. Abstract : Dendritic Au nanowires (Au DNWs) exhibited high catalytic activity compared to spherical Au nanoparticles. However, the catalytic activity was lowered after standing in an aqueous solution for 16 days due to morphological changes. We prepared supported Au DNW powder by a seed growth method using alumina‐supported Au nanoparticles as seed materials. The DNW structure and the catalytic activity of the supported Au DNWs were not changed after standing for 16 days in air.