Corking and uncorking a catalytic yolk-shell nanoreactor: Stable gold catalyst in hollow silica nanosphere

Chen Han Lin, Xiaoyan Liu, Si-Han Wu, Kao Hsiang Liu, Chung Yuan Mou

研究成果: 雜誌貢獻文章同行評審

66 引文 斯高帕斯(Scopus)

摘要

Silica templating of a water-in-oil (w/o) microemulsion system containing HAuCl4 results in gold nanoparticles of sizes around 3 nm confined in hollow silica nanospheres. The size of the gold nanocatalyst is stable to high temperature calcination. Its catalytic activity toward CO oxidation is very stable after repeated use and long-time storage. The reaction can be controlled by a corking design based on capillary condensation of water vapor for corking the mesopores on the shell. At higher temperature or low water vapor pressure, pores open after vapor evaporation and water promotes the CO oxidation. The corking and uncorking mechanism of the yolk-shell type nanoreactor is reversible.

原文英語
頁(從 - 到)2984-2988
頁數5
期刊Journal of Physical Chemistry Letters
2
發行號23
DOIs
出版狀態已發佈 - 12月 1 2011
對外發佈

ASJC Scopus subject areas

  • 材料科學(全部)

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