为获得具有高催化活性的多元掺杂纳米多孔Pd,将 Pd10 Ni50 Co20 P16 B4金属玻璃作为预合金,分别在 H2 SO4+H3 PO4酸溶液和 NaCl 盐溶液中以不同过电位,进行了电化学脱合金处理。在酸溶液中,制得了Ni、Co和P 共掺的Pd纳米多孔金属材料。该多孔金属具有三维连通的纳米多孔结构,在对甲酸的催化中表现出了良好的催化活性。与市售碳负载的纳米Pd催化剂相比,在Ni、Co 和 P 共掺的纳米多孔 Pd 催化条件下,甲酸的氧化电位发生了显著负移。在 NaCl溶液中,Pd10 Ni50 Co20 P16 B4金属玻璃脱合金后不能获得具有高催化活性的纳米多孔结构。
With the aim of fabricating multicomponent nanoporous Pd (NPPd)with enhanced electrocatalytic performance,the Pd10 Ni50 Co20 P16 B4 metallic glass was used as the starting alloy for dealloying in H2 SO4+H3 PO4 and NaCl solutions at various overpotentials.In the acid solution,NPPd with Ni,Co and P residuals can be obtained.The as-obtained multicomponent NPPd exhibited high electrocatalytic activity towards the oxida-tion of formic acid,as evidenced by the lower oxidation potential of the formic acid when compared with that under the catalysis of commercial Pd/C.In the NaCl solution,NPPd with high electrocatalytic activity cannot be prepared.
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