Rationally designing active and stable amorphous catalysts with ultrathin nanostructures for the oxygen evolution reaction (OER) is highly desirable, but still remains a substantial challenge. Herein, we report the facile solvothermal synthesis of amorphous Fe-doped Co₃(PO₄)₂ (Am Fe–Co₃(PO₄)₂) ultrathin nanowires with diameters of about 2.0 nm as an efficient electrocatalyst for the OER. The amorphous nature and ultrathin nanowire structure can increase the electrochemically active surface area for exposing more catalytically active sites; meanwhile, Fe incorporation contributes to enhancing intrinsic catalytic activity and electrical conductivity. As a result, Am Fe–Co₃(PO₄)₂ ultrathin nanowires with structural and compositional benefits exhibit remarkable OER electrocatalytic performance, with a low overpotential of 245 mV at 10 mA cm⁻² in 1.0 M KOH, and a small Tafel slope of 42 mV dec⁻¹, as well as robust durability. This work provides a novel strategy to synthesize other doped amorphous ultrathin nanomaterials with a well-defined structure for developing highly efficient OER catalysts.

中文翻译：

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铁掺杂磷酸钴一维非晶态超薄纳米线作为水氧化的高效电催化剂

为氧释放反应（OER）合理设计具有超薄纳米结构的活性和稳定的非晶态催化剂是非常需要的，但仍然是一个巨大的挑战。在本文中，我们报道了直径约2.0 nm的非晶态Fe掺杂Co ₃（PO ₄）₂（Am Fe–Co ₃（PO ₄）₂）超薄纳米线的轻松溶剂热合成，作为OER的有效电催化剂。非晶态和超薄纳米线结构可以增加电化学活性表面积，以暴露更多的催化活性位点；同时，Fe的掺入有助于增强固有的催化活性和导电性。结果，Am Fe–Co具有结构和组成优势的₃（PO ₄） ₂超薄纳米线表现出显着的OER电催化性能，在1.0 M KOH中在10 mA cm ^-2下具有245 mV的低过电势，在42 mV dec ^-1下具有小的Tafel斜率，如坚固耐用。这项工作提供了一种新颖的策略来合成具有良好结构的其他掺杂非晶态超薄纳米材料，以开发高效的OER催化剂。