Abstract
Employing NH4HCO3 as pore-enlarging agent and P123 as a template agent, ordered mesoporous Mg-doped γ-Al2O3 with different basicity and large surface area have been successfully synthesized by a facile sol–gel approach by adjusting the content of magnesium and pH value. Specifically, the result alumina calcined at 1000 °C with large specific surface area (234.4 m2 g–1) and high pore volume (0.72 cm3 g–1) was obtained when the Mg content was 9 wt %. These materials with ordered mesostructure and advantageous structural properties were utilized as carriers of Pd–Al2O3 catalysts for the catalytic reaction of simulated exhaust automobile gases including CO, NO, and hydrocarbon (HC). The results revealed that the high catalytic performance of Pd/9Mg-OMA originated from its more appropriate basicity, greater PdO dispersion, and higher surface area.
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