Influence of La2O3 Addition on CuO/CeO2 Catalysts for the Water-Gas Shift Reaction
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CuO/CeO2 and CuO/xCeO2-yLa2O3 catalysts, synthesized with varying CeO2 and La2O3 molar ratios (1:1, 1:2, and 2:1), were prepared via the hydrothermal method and tested in the water-gas shift reaction (150-350 °C). La2O3 addition altered structural properties, reducing surface area and copper dispersion. XANES and in situ XRD confirmed metallic Cu species during reduction and reaction. Catalytic tests revealed CuO/CeO2 excelled at low temperatures, while La2O3-doped catalysts, especially CuO/1CeO2-1 La2O3, performed better at 250-350 °C. Stability tests showed La2O3-doped catalysts resisted deactivation and sintering better than CuO/CeO2, even with CO2 and H2 in the feed.
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Langmuir, v. 41, n. 5, p. 3108-3120, 2025.
