XRD Analysis Of Cumnox

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The SEM result was also in good agreement of XRD analysis. The average particle size of CuMnRC1, CuMnRC2 and CuMnRC3 catalyst was 0.675µm, 3.127µm and 7.435µm respectively. The particles of CuMnRC1 catalyst was least agglomerated, highly porous, high surface area and uniformly distributed. The choice of different precipitant in the CuMnOx catalysts leads to the change of the surface distribution of Cu, Mn and O elements, which might be related to the CO oxidation catalytic performance of the catalysts.
Table 2: Particle size of CuMnRC catalysts
Catalyst Particle size (µm)
CuMnRC1 0.675
CuMnRC2 3.127
CuMnRC3 7.435

Thus, the different precipitants used in the preparation of CuMnOx (Cu1Mn8) in the present study considerably affect the particle
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A calcination strategy of the CuMnRC catalyst was highly influenced the elemental distribution of different elements presents on the surface of catalysts. The choice of different precipitant leads to the change of surface distribution of Cu, Mn and O elements, which might be related to the CO oxidation catalytic performance of the CuMnRC catalysts.

3.3 Phase identification and cell dimensions
The phase identification and cell dimensions of CuMnOx catalysts prepared in reactive calcination condition were done by the X-ray powder diffraction (XRD) technique. It was carried out to identify the crystalline size and coordinate dimensions present on the surface layer of the catalysts. XRD patterns of CuMnOx catalyst produced by reactive calcination
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4. XRD pattern of the CuMnRC1 (precipitated by KMnO4) catalyst has shown that the diffraction peak at 2θ of 36.96 corresponds to its lattice plane (112) end centered cubic Cu1Mn6O2 (PDF-75-1010 JCPDS file). The crystallite size of the catalyst was 3.90 nm. In reactive calcination the Na2CO3 precipitant CuMnRC2 catalyst has shown that diffraction peak at 2θ of 35.40 corresponds to its lattice plane (111) of face-centered cubic Cu1.2Mn1.8O4 (PDF-71-1144 JCPDS file). The crystallite size of the catalyst is 4.243 nm. The broader peak in CuMnRC1 has indicated that the relatively amorphous nature of the catalyst and their structure, phase, and crystallite size was also discussed in Table 2.

Fig. 4: EDX analysis of A) CuMnRC1, B) CuMnRC2 and C) CuMnRC3 catalyst
The XRD pattern of the CuMnRC3 catalyst (precipitated by KOH) has shown that the diffraction peak at 2θ of 37.37 corresponds to its lattice plane (110) of face-centered cubic CuMn2O4 (PDF-84-0543 JCPDS file). The crystallite size of the catalyst was 5.265 nm. After XRD analysis we can confirm that the crystalline size of CuMnRC1 has lower than the CuMnRC2 and CuMnRC3 catalyst so that it performs better result for CO oxidation at a lower temperature. Knowing width of XRD peak and Scherrer Eq., the calculated nano-crystalline of CuMnRC1, CuMnRC2 and CuMnAgRC3 catalyst is presented in Table 4.
Table 4: XRD analysis of CuMnRC catalysts

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