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Aerosol synthesis and Rietveld analysis of tetragonal (β_1) PdZn

机译:四方(β_1)PdZn的气溶胶合成和Rietveld分析

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摘要

The β_1 PdZn intermetallic of nominal 50:50 Pd:Zn at% was synthesized using an aerosol method. The aerosol method provided atomically mixed precursor oxy-nitrate powder that was then reduced to form β_1 PdZn, having a surface area amenable to catalytic measurements. Formation of the β_1 PdZn during reduction was found to occur rapidly (4h) and at moderate temperature (500 °C), serving to minimize the loss of volatile Zn. Chemical and structural characterization confirms that Pi PdZn (95-99 wt% phase pure) of the same composition as the nitrate feedstock solution can be prepared using this method. Detailed structural analysis shows that this material contains little or no vacancies and minimal Pd/Zn disorder.
机译:使用气溶胶法合成了标称50:50 Pd:Zn at%的β_1PdZn金属间化合物。气溶胶法提供了原子混合的前驱体硝酸盐粉末,然后将其还原以形成β_1PdZn,其表面积适合催化测量。发现还原过程中β_1PdZn的形成迅速发生(4h),并且在中等温度(500°C)下发生,从而最大程度地减少了挥发性锌的损失。化学和结构表征证实,可以使用该方法制备与硝酸盐原料溶液相同组成的Pi PdZn(95-99 wt%的相纯)。详细的结构分析表明,该材料几乎没有或完全没有空位,并且Pd / Zn紊乱最小。

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