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Updated: Apr 28, 2026

Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts
Published on: February 7, 2017
Enhanced formaldehyde oxidation on Pt/MnO₂ catalysts modified with alkali metal salts
Ying Chen1, Junhui He2, Hua Tian2
1Functional Nanomaterials Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China; School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China.
Abstract:
Novel Pt/MnO2 catalysts modified with alkali metal salts were prepared and exhibited excellent catalytic activity for formaldehyde oxidation. The effects of both cation and anion in the salts were investigated on the structure of catalysts and their catalytic activity. The Na(+) modification was demonstrated to be a facile and effective method to improve the catalysts performance for formaldehyde oxidation, but the anions remaining on the support might act as a mild poison by covering the surface active sites of manganese oxides. The enhancing effect of anions in the salts follows the order of CO3(2-)>SO4(2-)>NO3(-). A 100% formaldehyde conversion can be obtained at 50°C over the Na2CO3-modified catalyst. Further analyses indicate that strong metal-support interaction, well-dispersed Pt nanoparticles with small particle sizes and large surface area are important for high catalytic activity.
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