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Dry citrate-precursor synthesized nanocrystalline cobalt oxide as highly active catalyst for total oxidation of propane

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Abstract.
A set of nanocrystalline cobalt oxide (Co3O4)-based catalysts have been prepared by means of an
innovative soft reactive grinding (SRG) procedure. The catalysts exhibited excellent activities and
high stabilities for propane catalytic combustion. Complete conversion has been achieved at reaction
temperatures as low as 240 ◦C. Comparing with the highly active Co3O4 catalysts in the current
literature, the catalysts in this work show exceptionally high specific rate for propane total oxidation
(ca. 91.3 mmolC3 m−2 h−1 at 200 ◦C). A correlation between the O2-TPD results and the activity for
Co3O4 reveals that a high concentration of superficial electrophilic oxygen (O−) species is important
for achieving a high activity. The prominent lattice distortion induced by prolonged citrate-precursor
grinding is suggested to play a key role in creating and maintaining a high density of surface defects,
which leads to highly activity and stability of the cobalt spinel catalyst.

Keywords:
Propane
Total oxidation
Nanocrystalline Co3O4
Electrophilic oxygen
Lattice distortion

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Informasi Detail

Judul Seri

Journal of Catalysis

No. Panggil

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Penerbit

London : Elsevier Inc.., 2009

Deskripsi Fisik

Journal of Catalysis 263 (2009) 104–113

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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