设计合成了Rh/CeO2-SiC新型催化剂,X射线衍射和透射电镜等表征结果表明,SiC表面均匀分散了4nm左右的CeO2纳米颗粒,进而可很好地分散Rh纳米粒子.该催化剂在乙醇部分氧化制氢反应中显示出优越的催化性能,乙醇转化率及H2选择性随反应温度的提高而提高,700C时乙醇转化率为100%,H2选择性为50%,CO选择性仅为13%,且反应40h未见明显失活,反应后催化剂表面没有明显的积炭生成.该催化剂上较低的CO选择性及抗积炭性能可归因于SiC的热传导性能以及CeO2中活泼晶格氧的作用.
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