The search for an oxygen evolution reaction (OER) electrocatalyst with much improved performance is ongoing. The development and design of highly active, noble-metal free and low cost electrocatalysts is of great importance for the realization of renewable energy. Herein, a carbon cloth (CC) supported iron doped cobalt phosphide, layered-with a nickel phosphide film (Fe_0.45Co_0.55P/NiP@CC) was synthesized with a simple two step electrochemical deposition technique at room temperature. This free-standing Fe_0.45Co_0.55P/NiP@CC heterostructure presents superior OER performance in an alkaline media, with a strikingly low onset potential of 1.26 V and achieving a current density of 10 mA cm⁻² at an overpotential of 247 mV vs. RHE in 1 M KOH, outperforming the state of the art RuO₂ electrocatalyst. A Tafel slope of 56 mV dec⁻¹ and excellent long-term stability was achieved. Purposefully using NiP as a scaffold to in situ generate an active oxyhydroxide (NiOOH) OER catalyst on the surface of the electrode and interface coupling between the two layers provides numerous active sites and a synergistic effect to bring forth the profoundly enhanced performance of Fe_0.45Co_0.55P/NiP@CC electrode.

中文翻译：

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逐层电沉积FexCo（1-x）P / NiP @ CC异质结构的界面调制，以实现高性能的析氧反应

正在寻求性能大大提高的析氧反应（OER）电催化剂。高活性，无贵金属，低成本的电催化剂的开发和设计对于实现可再生能源至关重要。在此，在室温下通过简单的两步电化学沉积技术合成了层叠有磷化镍膜（Fe _0.45 Co _0.55 P / NiP @ CC）的碳布（CC）负载的铁掺杂的磷化钴。这种独立的Fe _0.45 Co _0.55 P / NiP @ CC异质结构在碱性介质中表现出卓越的OER性能，具有1.26 V的极低启动电位，并实现了10 mA cm ^-2的电流密度在1 M KOH中，相对于RHE的过电位为247 mV ，胜过了最先进的RuO ₂电催化剂。Tafel斜率为56 mV dec ^-1，具有出色的长期稳定性。有目的地使用NiP作为支架在电极表面上原位生成活性羟基氧化物（NiOOH）OER催化剂，两层之间的界面耦合提供了许多活性位点和协同效应，从而显着提高了Fe _0.45 Co的性能_0.55 P / NiP @ CC电极