Surface tailoring of Pt-based nanocatalysts is an effective pathway to promote their electrocatalytic performance and multifunctionality. Here, we report two kinds of one-dimensional (1D) ultrafine PtCu nanowires (smooth surface & rugged surface) synthesized via a wet chemical method and their distinct catalytic performances in electro-oxidation of alcohols. The alloyed PtCu nanowires having rough surfaces with atomic steps exhibit superior catalytic activity toward multiple electrochemical reactions compared with the smooth counterpart. Density functional theory simulations show the excellent reactivity of rugged PtCu na-nowires and attribute it to the surface synergetic Pt-Cu site which accounts for the promotion of water dissociation and the dehydrogenation of the carboxyl intermediate. The current study provides an insight into reasonable design of alloy nanocatalysts in energy-related electrocatalytic systems.

基于Pt的纳米催化剂的表面修整是提高其电催化性能和多功能性的有效途径。在这里，我们报告两种通过合成的一维（1D）超细PtCu纳米线（光滑表面和粗糙表面）湿化学方法及其在醇电氧化中的独特催化性能。与光滑的对应物相比，具有原子台阶的粗糙表面的合金化PtCu纳米线对多种电化学反应表现出优异的催化活性。密度泛函理论模拟表明，坚固的PtCu纳米线具有出色的反应活性，并将其归因于表面协同作用的Pt-Cu部位，这有助于促进水离解和羧基中间体的脱氢作用。当前的研究为能源相关的电催化系统中合金纳米催化剂的合理设计提供了见识。