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采用单辊旋淬方法制备了成分和结构均匀的铂钛铜合金条带,通过脱合金方法进行选择性腐蚀得到了具有三维双连续孔洞结构的纳米多孔铂钛铜(np-PtTiCu)催化剂.将np PtTiCu作为三电极测试体系中的工作电极,利用循环伏安法表征了其对甲酸、乙醇和甲醇的电催化氧化性能以及抗CO中毒能力,利用恒电位极化方法表征了其电催化稳定性.结果表明,np-PtTiCu催化剂比Pt/C催化剂具有更高的电催化活性,更好的抗CO中毒能力和稳定性,这些性能的改善与电极材料的多孔结构有关.

Melt spun precursor PtTiCu alloy ribbons with uniform composition and structure were chemically dealloyed to attain a bicontinuous nanoporous structures as electrocatalysts for fuel cells.The electrocatalytic ox idation for methanol,formic acid,ethanol with PtTiCu catalysts as well as CO poisoning resistance of these nanoporous Pt-containing catalysts were investigated.In comparison with commericial Pt/C catalysts,np-Pt TiCu electrocatalysts demonstrated better electrocatalytic performance,greater CO tolerance and preferable cat alytic stability,which may be attributed to their unique 3D bicontinuous pore/ligament structures.

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