Combustion synthesis of nanometal particles supported on α-Al2O3: CO oxidation and NO reduction catalysts
Abstract
Nanoparticles of Pt, Pd, Ag and Au supported on α-Al
2
O
3
have been synthesized by the combustion method for the first time and characterized by X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. Catalytic activities of these nanosized materials have been investigated. For the CO+O
2
reaction, 100% CO conversion occurs below 300 °C over supported Pt, Pd and Ag metals whereas 90% conversion is observed over Au at 450 °C. Similarly 100% NO conversion is seen over 1% Pd/Al
2
O
3
and 1% Pt/Al
2
O
3
below 400 °C for the NO+CO reaction whereas ≈90% NO is converted into N
2
above 650 °C on 1% Ag/Al
2
O
3
and 1% Au/Al
2
O
3
.
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