Physical Properties and Selective CO Oxidation of Coprecipitated CuO/CeO₂Catalysts Depending on the CuO in the Samples

Abstract

This paper investigates the effects of CuO contents in the CuO-CeO2catalysts to the variation in physical properties of CuO/CeO2catalysts and correlates them to their catalytic activities on selective CO oxidation. The characteristic of crystallites were revealed by X-ray diffraction, and their morphological developments were examined with TEM, SEM, and BET methods. Catalytic performance of catalysts was investigated in the temperature range of 90–240°C. The results showed that the catalyst was optimized at CuO loading of 20 wt.%. This was due to the high dispersion of CuO, high specific surface area, small crystallite sizes, and low degree of CuO agglomeration. Complete CO conversion with near 100% selectivity was achieved at a temperature below 120°C. The optimal performance was seen as a balance between CuO content and dispersion observed with growth, morphology, and agglomeration of nanostructures.

Can we judge an oxide by its cover? The case of platinum over α-Fe2O3 from first principles

“…Metal/metal-oxide interfaces are widely used in a variety of technological applications, such as sensors, electronic devices, catalysts and catalyst supports in various chemical reactions. [1][2][3][4][5][6][7][8] Some examples include water oxidation in photoelectrochemical (PEC) cells, [9][10][11][12][13] water gas shift (WGS), [14][15][16] selective carbon monoxide (CO) oxidation, 6,[17][18][19] and H 2 oxidation in polymer electrolyte membrane fuel cells (PEMFCs). [20][21][22][23] One such metal-oxide is hematite (a-Fe 2 O 3 , a dropped from this point), a widely used water oxidation catalyst.…”

Effect of Calcination Temperatures of Cu/CeO₂-Containing Co on Physiochemical Properties and Catalytic Activity to Selective CO Oxidation

“…The CuO/CeO 2 has been proposed as a promising catalyst due to its low cost and high catalytic conversion for CO oxidation reaction at low temperature compared with noble metal catalysts [4,5]. The high catalytic activity results from the attribution of the high oxygen storage capacity of CeO 2 and a strong interaction between copper oxide and cerium oxide [6].…”