分别以孔径为8.5nm、4.4nm和3.1nm的3种蠕虫孔炭WMC-F7、WMC-F30和WMC-F0为载体,合成了纳米Pt2 Sn1/WMC催化剂.XRD与透射电镜结果表明3种载体上的催化剂平均粒径均为3.0nm,其电化学性能却相差很大.研究发现蠕虫孔炭载体的孔径显著影响Pt2 Sn1催化剂的电化学性能:当载体孔径(Dp)大于2倍催化剂平均粒径(dPt)时,催化剂(即Pt2 Sn1/WMC-F7)的电化学活性面积(ESA)和乙醇电氧化(EOR)活性均为最高;当以另外两种孔径的蠕虫孔炭作载体时,Pt2 Sn1催化剂活性很差.这主要归因于WMC-F7的大孔径有利于传质,提高了催化剂的利用率及乙醇电氧化活性.
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