PtM (M = transition metals) alloys are currently the most convincing oxygen reduction reaction (ORR) electrocatalysts. Although appealing, uneven particle size distribution inevitably occurs because of large mismatch of reduction thermodynamics and kinetics between Pt and M precursors, and stringent synthetic conditions. An electrodeposition strategy in N, N-Dimethylformamide (DMF) was applied to fabricate PtCo/C electrocatalysts. The coordination between DMF and Pt and Co precursors greatly narrow their deposition potential gap to promote alloying. DMF selectively adsorbs on Pt (111) facets, which helps to expose more PtCo (111) facets to provide a high ORR activity, and greatly benefits the high uniformity of particle sizes to ensure a remarkable durability.The specific activity (SA) of as-optimized PtCo_-1.8/C is more than 5 times that of commercial Pt/C, and shows almost no change after accelerated degradation test (ADT). Density functional theory (DFT) also indicates that the sample with surface Pt:Co ratio of 1:1 promises the best catalytic activity.

PtM（M = 过渡金属）合金是目前最有说服力的氧还原反应（ORR）电催化剂。尽管很吸引人，但由于 Pt 和 M 前体之间的还原热力学和动力学不匹配以及严格的合成条件，不可避免地会出现不均匀的粒度分布。N,N-二甲基甲酰胺 (DMF) 中的电沉积策略被应用于制造 PtCo/C 电催化剂。DMF 与 Pt 和 Co 前驱体之间的配位极大地缩小了它们的沉积电位间隙以促进合金化。DMF 选择性吸附在 Pt (111) 晶面上，这有助于暴露更多的 PtCo (111) 晶面以提供高 ORR 活性，并极大地有利于颗粒尺寸的高度均匀性以确保显着的耐久性。 -优化的 PtCo _-1.8/C 是商业 Pt/C 的 5 倍以上，在加速降解试验（ADT）后几乎没有变化。密度泛函理论 (DFT) 还表明，表面 Pt:Co 比例为 1:1 的样品有望获得最佳催化活性。