Catalytic Activity of Highly Dispersed Mn2O3-Bi2O3-ZrO2-CeO2 Solid Solutions (M = Nd, Sm, Gd) in the Reaction of Carbon Monoxide Oxidation

Liberman, E. Yu.; Подъельникова, Е.С.; Симакина, Е. А.; Конькова, Т. В.; Kleusov, B. S.

doi:10.1134/s1070427219050112

Cited by 2 publications

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“…The successful incorporation of dopant ions into CeO 2 has been observed with other metals such as Zr, Gd, Bi, Nd, Sm, and Ag. 8,16 As shown in Table 1, the amounts of Mn are relatively small compared with those of Cu, which is presumably related to the difference in the ionic radii of Cu 2+ (0.8 Å) and Mn 4+ (0.58 Å). In other words, as the ionic radius of Cu 2+ is close in size to that of Ce 4+ (0.87 Å), Cu 2+ ions can be easily substituted for Ce 4+ ions in the crystal lattice of CeO 2 .…”

Section: Characterization Of the Catalystsmentioning

confidence: 99%

“…This change is attributed to the development of more defects with the addition of Cu and Mn. 16 The formation of a defect structure means that the amount of oxygen vacancies on the catalyst surface increases. The introduction of dopant metals into the CeO 2 lattice leads to a charge imbalance due to the lower oxidation numbers of the dopants.…”

Section: Characterization Of the Catalystsmentioning

confidence: 99%

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Synthesis and catalytic properties of a novel copper- and manganese-substituted cerium dioxide for benzene remediation

Yang

You

2020

Journal of Chemical Research

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Catalysts based on inexpensive and abundant transition metals are necessary for effective environmental remediation. In this study, a series of CuMn-CeO2 catalysts is synthesized by a simple coprecipitation method. The properties of the as-prepared catalysts are characterized by X-ray diffraction, Brunauer–Emmett–Teller analysis, scanning electron microscopy–energy-dispersive spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The introduction of dopants results in rougher surfaces with greater surface areas and pore volumes as well as more surface defects. Furthermore, the dopant-added catalysts exhibit higher activities for benzene oxidation, as the temperature required for 90% benzene removal with Cu4Mn1-CeO2 (656 K) was 231 K lower than that required with CeO2. The superior performance of the dopant-added CeO2 catalyst is attributed to the generation of defect-rich surfaces due to the isomorphous substitution of Cu and Mn in the crystal lattice of CeO2.

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Section: Characterization Of the Catalystsmentioning

confidence: 99%

Section: Characterization Of the Catalystsmentioning

confidence: 99%