Pd/ZrO2是甲烷低温燃烧研究较为广泛的催化剂,其中载体ZrO2对稳定PdO起到了重要作用.采用水热法合成了纯相的M-ZrO2和T-ZrO2,然后采用浸渍法制备了Pd/M-ZrO2和Pd/T-ZrO2催化剂,并考察了不同晶型ZrO2对催化剂的活性和稳定性的影响.结果表明,Pd/M-ZrO2催化剂的活性和稳定性明显优于Pd/T-ZrO2.结合XRD、TEM和TPO表征结果,发现Pd/M-ZrO2活性高的原因是PdO分散性更好,Pd/M-ZrO2较好的稳定性与PdO和ZrO2的作用方式有关.
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