NO_x对掺杂贵金属的SnO_2气敏元件特性的影响

The Effect of NO_x on the Gas Sensitivity ofSnO_2 Doped with Noble Metals

本文报道了掺杂Ｐｄ和Ｐｔ等贵金属的ＳｎＯ＿２气敏元件置于ＮＯ＿ｘ气氛中，灵敏度发生明显下降的现象。分析认为，其主要原因是元件中的贵金属受到了ＮＯ＿ｘ污染．ＸＰＳ分析表明，污染后的Ｐｄ３ｄ＿（５／２）已确有化学位移。

When SnO_2 gas sensors doped with Pd and Pt were placed in the NO_x,the sensi-tivity of the SnO_2 gas sensor greatly decreased.The main reason of the decreasing of the sen-sitivity was that the Pd and Pt were polluted by NO_x XPS analysis indicated that the Pd hada chemical shift after the pollution.