e-journal

Enhanced carbon monoxide oxidation activity over gold–ceria nanocomposites

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Abstract.
The composites with nanosized gold loaded in nanoporous ceria were prepared on a large scale by a facial
and environment-benign sol–gel process. These materials were characterized by XRD, ICP, BET, UV–vis
absorption, XPS, HRTEM and EDX. The main factors such as size and surface state of the Au and defect in
the ceria could be adjusted by acid treatment of the composites in ascorbic acid solution to improve the
activity and decrease the content of noble metal Au in the materials. Enhanced catalytic activities were
obtained for the CO oxidation reaction over the catalysts due to the small crystal sizes with narrow size
distributions of gold nanoparticles, a large amount of defects in the nanoporous ceria support, as well as a
high ratio of Au3+/Au0 in the nanocomposites.

Keywords: Gold–ceria nanocomposites, Enhanced catalytic activity, Low content of Au, CO oxidation

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Informasi Detail

Judul Seri

Applied Catalysis B: Environmental

No. Panggil

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Penerbit

London : Elsevier B.V.., 2008

Deskripsi Fisik

Applied Catalysis B: Environmental 84 (2008) 790–796

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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