采用共沉淀法制得不同摩尔比的ZrO2和Al2O3复合载体,考察了负载型Pd/nZrO2-mAl2O3催化剂上CH4的催化燃烧反应,当催化剂中n(ZrO2)∶ n(Al2O3)=1∶ 5.8时催化活性最好. XRD结果显示,ZrO2的引入量影响了催化剂的表面组成和结构,当催化剂中存在单斜相ZrO2及催化剂成大孔径分布时催化剂活性较好. O2-TPD结果表明,适量ZrO2引入,促使载体与贵金属的相互作用形成大量活性PdOx,提高了催化剂的CH4氧化能力.
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