Structural and catalytic properties of Fe and Ni doping on CuMnOx catalyst for CO oxidation

Abstract

The application of iron (Fe) or nickel (Ni) doping over hopcalite (CuMnOx) catalyst highly effects on their structural properties and catalytic performance for ambient conditions carbon monoxide (CO) oxidation have been investigated. The NiO and Fe2O3 phases are easily isolated over the CuMnOx catalyst. The (Fe or Ni) doping was done in the range of (0.5–5 wt%) in CuMnOx catalyst. The better catalytic activity was observed at 3.50 wt% of Fe, and 4.0 wt% of Ni loading in CuMnOx catalyst was separately found. However, the catalytic performance of CuMnOx catalyst was also depended on the promoters’ percentages rate. The smaller percentages of promoters carry out superior result than the higher ones. The size of catalytic material was also decreases, and specific surface area was also increased; therefore, the formation of active sites for CO conversion improved highly. The calcination strategies (reactive calcinations and traditional calcinations) highly affect on the performance of final catalysts. The reactive calcinations prepared catalysts that show the most excellent catalytic performances for CO conversion as compared to the other ones. The activity of catalysts was also matched with their characterization results. [Figure not available: see fulltext.] © 2020, Springer Nature Switzerland AG.