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用共沉淀法制备了一系列不同铈锆摩尔比CexZr1-xO2,并用沉积沉淀法制备了Au/CexZr1-xO2催化剂,以乙醇部分氧化制氢为探针反应,研究了Zr掺杂对Au/CeO2催化剂乙醇部分氧化性能的影响,并运用XRD、TEM、TPD、BET等方法对催化剂进行了表征。结果表明,Zr掺杂使Au/CeO2催化剂的颗粒分散更均匀,提高了Au/CeO2催化剂的比表面积和对乙醇的吸附能力增强,Au/Ce0.3Zr0.7O2比催化剂Au/CeO2体现出更好的乙醇部分氧化制氢的低温活性,并提高了氢气选择性,明显降低了CO选择性。
A series of CexZr1-xO2 cerium-zirconium molar ratios were prepared by coprecipitation method. Au / CexZr1-xO2 catalysts were prepared by deposition precipitation method. Partial oxidation of ethanol to hydrogen was used as the probe reaction. The effect of Zr doping on Au / CeO2 The results showed that the catalyst was characterized by XRD, TEM, TPD and BET. The results showed that Zr doping promoted the dispersion of Au / CeO2 catalyst particles more uniformly, enhanced the specific surface area of Au / CeO2 catalyst and enhanced the adsorption capacity of ethanol, and Au / Ce0.3Zr0.7O2 showed better performance than Au / CeO2 catalyst Ethanol partial oxidation of hydrogen at low temperature activity and improve the hydrogen selectivity, significantly reducing the CO selectivity.