Toluene and 2-propanol mixture oxidation over Mn2O3 catalysts: Study of inhibition/promotion effects by in-situ DRIFTS

Moreno-Román, E.J.; González‐Cobos, Jesús; Guilhaume, N.; Gil, Sonia

doi:10.1016/j.cej.2023.144114

Cited by 11 publications

(1 citation statement)

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“…Propane, as a kind of light alkane, is the most difficult class of volatile organic compounds (VOCs) to catalytically degrade. The total bond energy of the C-H bond of propane is as high as 4016 kJ/mol [1][2][3], much more than that of aromatic and oxygenic hydrocarbons in the field of printing, dyeing, and spraying industries which are easy to catalytically oxidize [4][5][6]. Consequently, the degradation of propane requires high-activity catalysts and high combustion temperatures [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Low-Noble-Metal Ru@CoMn2O4 Spinel Catalyst for the Efficient Oxidation of Propane

Cui,

Zeng,

Hou

et al. 2024

Molecules

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Noble metals have become a research hotspot for the oxidation of light alkanes due to their low ignition temperature and easy activation of C-H; however, sintering and a high price limit their industrial applications. The preparation of effective and low-noble-metal catalysts still presents profound challenges. Herein, we describe how a Ru@CoMn2O4 spinel catalyst was synthesized via Ru in situ doping to promote the activity of propane oxidation. Ru@CoMn2O4 exhibited much higher catalytic activity than CoMn2O4, achieving 90% propane conversion at 217 °C. H2-TPR, O2-TPD, and XPS were used to evaluate the catalyst adsorption/lattice oxygen activity and the adsorption and catalytic oxidation capacity of propane. It could be concluded that Ru promoted synergistic interactions between cobalt and manganese, leading to electron transfer from the highly electronegative Ru to Co2+ and Mn3+. Compared with CoMn2O4, 0.1% Ru@CoMn2O4, with a higher quantity of lattice oxygen and oxygen mobility, possessed a stronger capability of reducibility, which was the main reason for the significant increase in the activity of Ru@CoMn2O4. In addition, intermediates of the reaction between adsorbed propane and lattice oxygen on the catalyst were monitored by in situ DRIFTS. This work highlights a new strategy for the design of a low-noble-metal catalyst for the efficient oxidation of propane.

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