Xingfan Gong, Jiacheng Xu, Tiantian Zhang, Yan Sun, Shiyu Fang, Ning Li, Jiali Zhu, Zuliang Wu, Jing Li, Erhao Gao, Wei Wang, Shuiliang Yao
Cu-doped manganese oxide (Cu-Mn2 O4 ) prepared using aerosol decomposition was used as a CO oxidation catalyst. Cu was successfully doped into Mn2 O4 due to their nitrate precursors having closed thermal decomposition properties, which ensured the atomic ratio of Cu/(Cu + Mn) in Cu-Mn2 O4 close to that in their nitrate precursors. The 0.5Cu-Mn2 O4 catalyst of 0.48 Cu/(Cu + Mn) atomic ratio had the best CO oxidation performance, with T 50 and T 90 as low as 48 and 69 °C, respectively. The 0.5Cu-Mn2 O4 catalyst also had (1) a hollow sphere morphology, where the sphere wall was composed of a large number of nanospheres (about 10 nm), (2) the largest specific surface area and defects on the interfacing of the nanospheres, and (3) the highest Mn3+ , Cu+ , and Oads ratios, which facilitated oxygen vacancy formation, CO adsorption, and CO oxidation, respectively, yielding a synergetic effect on CO oxidation...
April 16, 2023: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry