Startseite Effect of anions on the structure and catalytic properties of a La-doped Cu-Mn catalyst in the water-gas shift reaction
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Effect of anions on the structure and catalytic properties of a La-doped Cu-Mn catalyst in the water-gas shift reaction

  • Run-Xia He EMAIL logo , Hao-Qiang Jiang , Fang Wu , Ke-Duan Zhi , Na Wang , Chen-Liang Zhou und Quan-Sheng Liu
Veröffentlicht/Copyright: 15. April 2014
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Chemical Papers
Aus der Zeitschrift Chemical Papers Band 68 Heft 8

Abstract

Effects of the anion type on the structure, thermal stability, and catalytic performance of La-doped Cu-Mn catalysts prepared by co-precipitation were characterized by X-ray diffraction, Brunauer-Emmett-Teller, temperature-programmed reduction, temperature-programmed reduction of oxidized surfaces, and temperature-programmed desorption. The Cu-Mn catalyst was tested for the water-gas shift (WGS) reaction. The main crystalline phase of samples prepared with sulfate, acetate, chloride, and nitrate as the starting materials was a Cu1.5Mn1.5O4 spinel structure, following the WGS reaction, the main crystalline phases were transformed into Cu and MnO. The sample prepared with acetate as the starting material showed the most obvious MnCO3 characteristic diffraction peaks, with better synergistic effects of Cu and MnO, increased adsorption of CO2 and improved dispersion of Cu on the catalyst surface; also, the best thermal stability and the highest low temperature catalytic activity were observed. The sample prepared with nitrate as the starting material maintained high thermal stability and catalytic performance in the range of 400°C to 450°C, but CO conversion decreased below 350°C. Catalytic performance of the sample prepared with sulfate and chloride as the starting materials was poor, ranging from 200°C to 450°C.

Keywords: La-doped Cu-Mn catalyst; anion; shift reaction performance; thermal stability

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Published Online: 2014-4-15
Published in Print: 2014-8-1

© 2014 Institute of Chemistry, Slovak Academy of Sciences

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https://doi.org/10.2478/s11696-014-0556-4
Schlagwörter für diesen Artikel
La-doped Cu-Mn catalyst; anion; shift reaction performance; thermal stability

Artikel in diesem Heft

  1. Recent advances in application of liquid-based micro-extraction: A review
  2. Determination of nitrites and nitrates in drinking water using capillary electrophoresis
  3. Comparison of digestion methods for determination of total phosphorus in river sediments
  4. Interdisciplinary study on pottery experimentally impregnated with wine
  5. Improvement in γ-decalactone production by Yarrowia sp. after genome shuffling
  6. Development of an effective extraction process for coenzyme Q10 from Artemia
  7. Effect of anions on the structure and catalytic properties of a La-doped Cu-Mn catalyst in the water-gas shift reaction
  8. Effect of apple pomace powder addition on farinographic properties of wheat dough and biscuits quality
  9. Influence of caffeine and temperature on corrosion-resistance of CoCrMo alloy
  10. Cetyltrimethylammonium bromide- and ethylene glycol-assisted preparation of mono-dispersed indium oxide nanoparticles using hydrothermal method
  11. Sol-gel synthesis, characterisation, and photocatalytic activity of porous spinel Co3O4 nanosheets
  12. Solvent-free synthesis of β-enamino ketones and esters catalysed by recyclable iron(III) triflate
  13. Potassium phthalimide-catalysed one-pot multi-component reaction for efficient synthesis of amino-benzochromenes in aqueous media
  14. Organocatalytic SOMO reactions of copper(I)-acetylide and alkylindium compounds with aldehydes
  15. Molecular modelling and quantitative structure-activity relationship studies of anatoxin-a and epibatidine derivatives with affinity to rodent nAChR receptors
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