FeNi-based nanomaterials with bimetallic alloying effect deliver a great promise as an efficient electrocatalyst for oxygen evolution reaction (OER). However, the reconstruction to generate in-situ catalytically FeNi-based oxides or hydroxides during OER process and high electrical conductivity demand foster the great pursuit of the rational design of FeNi-based OER electrocatalyst a big challenge. Herein, we design and fabricate a nanostructured metallic FeNi₂S₄ as a highly efficient OER electrocatalyst. This catalyst exhibits an overpotential of (250 mV) and a Tafel slope (62 mV dec⁻¹), that outperforms the benchmark of commercial RuO₂. The experimental results demonstrate that the alloying effect and the superior electrical conductivity, endow it a great electrocatalytic performance. Such a nanostructured metallic OER electrocatalyst shows a great promise in water splitting.

具有双金属合金化作用的基于FeNi的纳米材料作为氧释放反应（OER）的有效电催化剂具有广阔的前景。然而，在OER过程中进行重构以产生原位催化的FeNi基氧化物或氢氧化物以及高电导率需求，极大地推动了对FeNi基OER电催化剂合理设计的巨大挑战。在此，我们设计并制造了纳米结构的金属FeNi ₂ S ₄作为高效的OER电催化剂。该催化剂表现出（250 mV）的超电势和Tafel斜率（62 mV dec ^-1），超过了商业RuO ₂的基准。实验结果表明，合金化作用和优良的电导率赋予其良好的电催化性能。这种纳米结构的金属OER电催化剂在水分解中显示出巨大的希望。