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OALib Journal期刊
ISSN: 2333-9721
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常压下Pt-Bi双金属催化剂上甘油选择性氧化
DOI: 10.1016/S1872-2067(10)60289-6, PP. 1831-1837
Keywords: 甘油氧化,铂,铋,活性碳载体,二羟基丙酮
Abstract:
？制备了一系列活性碳(AC)负载的Pt-Bi双金属催化剂,考察了催化剂中Bi含量对其催化甘油选择性氧化反应性能的影响.结果表明,适量Bi的添加可以改善催化剂中Pt的氧化还原性能,从而有利于催化剂活性的提高和二羟基丙酮(DIHA)产物的生成.当Bi的含量为5%时,该催化剂的活性最高,甘油转化率和DIHA选择性分别达到91.5%和49.0%.表征结果显示,Pt-Bi颗粒的平均粒径为3.8nm,且高度分散在催化剂表面,这是该催化剂具有较高活性的主要原因.
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