Pd/PdO循环氧化还原过程特性研究

Oxidation/Reduction Cyclic Property of Pd/PdO

摘要:

应用热重和高温X射线衍射技术，研究了Pd/PdO的高温循环氧化还原过程，并考察了添加少量Mn对其高温热稳定性的影响。结果表明：PdO在一个确定的温度将会急剧分解为金属Pd，其分解温度与粉体粒度无关。Pd/PdO是否出现循环氧化特征将取决于Pd粉的分散状态，加入适量的Mn将会改变Pd/PdO的高温热稳定性和循环氧化特征

Abstract:

The high-temperature oxidation/reduction cycle of Pd/PdO was investigated by high-temperature X-ray diffraction and thermogravimetric technique. Moreover, effects of minor Mn addition on the thermal stability of Pd/PdO were also studied. The results show that PdO will decompose to metal Pd sharply at a certain temperature, and the decomposition temperature is independent of powder granularity. The dispersion state of Pd powder decides the hysteresis characteristics of the phase transition Pd/PdO. Proper Mn addition can change the high temperature thermal stability and hysteresis curve of Pd/PdO system