碳负载Pd0.8Fe0.2合金催化剂的氧还原催化性能
Chemical Engineer（2021）
Abstract
以Pd(C5H7O2)2和Fe3(CO)12为原料,1,6-己二醇为溶剂,采用回流技术制备了Pd0.8 Fe0.2/C催化剂,并考察了其对氧还原反应(ORR)的催化活性.结果表明,所得样品呈面心立方结构,Fe固溶于Pd晶格,形成Pd-Fe合金.催化剂存在聚集现象,聚集颗粒大小较为均匀.在Pd/C中添加Fe明显提高了催化剂对ORR的催化活性,在Pd0.8 Fe0.2/C催化剂上氧分子还原生成水遵循四电子机理.Fe的添加能改变Pd表面状态,减弱了Pd-Oads键能,促进了吸附氧的脱附和还原.
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