An electrocatalyst with ultra-small PtCo single atom alloy species evenly dispersed on nitrogen-doped ultra-thin carbon nanosheets (PtCo SAA/NC) was designed. The introduction of single-atom Pt not only maximizes the atomic utilization efficiency of Pt species, but also synergistically enhances the charge transfer characteristics of Co cluster surfaces, thereby increasing the migration and evolution rate of hydrogen ions. The PtCo SAA/NC catalyst exhibits a Tafel slope of 42 mV dec⁻¹ and a low overpotential of 45 mV at 10 mA cm⁻² in 0.5 M H₂SO₄ solution.

中文翻译：

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氮掺杂碳纳米片复合铂钴单原子合金催化剂用于有效析氢反应

设计了一种具有均匀分散在氮掺杂超薄碳纳米片上的超小PtCo单原子合金物种的电催化剂（PtCo SAA/NC）。单原子Pt的引入不仅最大限度地提高了Pt物种的原子利用效率，而且协同增强了Co簇表面的电荷转移特性，从而提高了氢离子的迁移和析出速率。 PtCo SAA/NC催化剂在0.5 MH ₂ SO _{4溶液中表现出42 mV dec} ^{-1的塔菲尔斜率和在10 mA cm -2}下45 mV的低过电势。