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

doi:10.1021/jz201336h

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

Research output: Contribution to journal › Article › peer-review

72 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	2984-2988
Number of pages	5
Journal	Journal of Physical Chemistry Letters
Volume	2
Issue number	23
DOIs	https://doi.org/10.1021/jz201336h
Publication status	Published - Dec 1 2011
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Physical and Theoretical Chemistry

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abstract = "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.",

author = "Lin, {Chen Han} and Xiaoyan Liu and Wu, {Si Han} and Liu, {Kao Hsiang} and Mou, {Chung Yuan}",

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T2 - Stable gold catalyst in hollow silica nanosphere

AU - Lin, Chen Han

AU - Liu, Xiaoyan

AU - Wu, Si Han

AU - Liu, Kao Hsiang

AU - Mou, Chung Yuan

PY - 2011/12/1

Y1 - 2011/12/1

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AB - 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.

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

Abstract

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