Non-noble, efficient catalyst of unsupported α-Cr2 O3 nanoparticles for low temperature CO Oxidation

Scientific Reports
Ali BumajdadFakhreia Al Sagheer

Abstract

Herein, we report the synthesis of chromium oxide nanoparticles, α -Cr2O3 NPs, followed by full characterization via XRD, SEM, XPS, and N2 sorptiometry. The synthesized nanoparticles were tested as catalysts toward the oxidation of CO. The impact of calcination temperature on the catalytic activity was also investigated. CO conversion (%), light-off temperature, T50, data were determined. The results revealed that chromia obtained at low calcination temperature (400 °C) is more active than those obtained at high calcination temperatures (600° or 800 °C) and this is ascribed to the smaller particle size and higher surface area of this sample. The results revealed a superior catalytic activity of Cr2O3 NPs at lower temperature as we reached a complete conversion at 200 °C which is high value in the forefront of the published results of other non-noble catalysts. The high activity of Cr2O3 nanoparticles (T50 as low as 98 °C) where found to be dependent on a careful selection of the calcination temperature. These results may provide effective and economic solutions to overcome one of the major environmental threats.

References

Aug 11, 2007·Environmental Health : a Global Access Science Source·Doug BruggeChristine Rioux
Apr 11, 2009·Nature·Xiaowei XieWenjie Shen
Mar 4, 2011·Journal of the American Chemical Society·Ayman D AllianEnrique Iglesia
Feb 28, 2014·Chemistry : a European Journal·Jiangman ZhenHongjie Zhang
Mar 31, 2015·ACS Applied Materials & Interfaces·Renato V GonçalvesLiane M Rossi

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X-ray
electron
scanning electron microscopy

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MOSAIC

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