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Crystallite sizes of Pt (d) were estimated by XRD. the dispersion D% and the metal area Am (m2 Pt/g of catalyst) can be calculated by D = 90/d(nm) and Am = 0.046Dxm, where xm is the metal loading in wt-% (equidistribution of surface metal atoms on <100>, <101> and <111> planes). ÕâÊÇÉó¸åÈ˵ÄÒâ¼û£¬¾ÍÊÇÈÃÎÒ¼ÆËãDºÍAm, ÏëÖªµÀÕâÁ½¸ö¹«Ê½µÄÀ´Ô´£¨Í¼Ê飿ÎÄÏ×£©ÒýÓÃһϡ£ |
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