Binary PtCo, PtCu and ternary PtCoCu alloys with different surface element distributions were prepared to study the effect of composition on electrocatalytic hydrogen evolution reaction (HER) and methanol oxidation reaction (MOR). A one-pot method was used to synthesize self-assembled alloy nanocrystals in one step. By adjusting the composition of synthesized alloys, their properties were optimized. The changes of morphology and property of the alloys after adding Cu were discussed. The HER and MOR properties of alloys were affected by the composition. Especially, the ternary alloy revealed better properties than that of the binary alloy. The starting potential of PtCoCu alloy in HER reaction under visible light is 14 mV and the overpotential under 10 mA cm⁻¹ is 44 mV, which revealed excellent cycle stability. The current density at 0.7 V for MOR reaction can reach 4.2 mA cm⁻¹. This is ascribed to the composition of alloy. Cu in alloys resulted in plasma-induced effective electron transfer. This result provides a feasible strategy for the design of effective multifunctional electrocatalysts.

制备具有不同表面元素分布的二元PtCo、PtCu和三元PtCoCu合金，研究成分对电催化析氢反应(HER)和甲醇氧化反应(MOR)的影响。采用一锅法一步合成自组装合金纳米晶。通过调整合成合金的成分，优化了它们的性能。讨论了加入Cu后合金的形貌和性能的变化。合金的 HER 和 MOR 性能受成分影响。特别是，三元合金显示出比二元合金更好的性能。PtCoCu合金在可见光下HER反应的起始电位为14 mV，10 mA cm ^-1下的过电位为 44 mV，显示出优异的循环稳定性。MOR反应在0.7 V时的电流密度可以达到4.2 mA cm ^-1。这归因于合金的成分。合金中的铜导致等离子体诱导的有效电子转移。该结果为设计有效的多功能电催化剂提供了可行的策略。