Interfacial engineering and defect modulation can provide abundant active sites for catalysts to further boost the catalysis process. In this work, we develop a strategy to grow multi‐heterogeneous cobalt phosphide (CoP) nanorods with rich interfaces and defects along the one‐dimensional (1D) nanostructure by dual incorporation of Fe and Ru (CoFeP@Ru). Such a catalyst exhibits high activity and stability towards the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), with overpotentials of only 38 mV in 0.5 M H₂SO₄ and 48 mV in 1.0 M KOH for HER, and an overpotential of 340 mV in 0.1 M KOH for OER at 10 mA cm⁻². Finally, as the bifunctional catalyst, an alkali electrolyzer is assembled and delivers at a low cell voltage, with almost 100 % Faradaic efficiency. Our experimental results demonstrate that Fe incorporation can disturb or even break the periodic structure of cobalt phosphides, causing a redistribution of the electronic structure and electron density of activity sites, while Ru can significantly enhance the catalytic kinetics, as well as electrochemical and mechanical stability.

中文翻译：

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构建具有添加活性位点的棒状CoFeP @ Ru异质结构以进行水分解

界面工程和缺陷调节可为催化剂提供丰富的活性中心，从而进一步促进催化过程。在这项工作中，我们制定了一种策略，通过对Fe和Ru（CoFeP @ Ru）的双重掺入，沿一维（1D）纳米结构生长具有丰富界面和缺陷的多相磷化钴（CoP）纳米棒。这种催化剂对氢气析出反应（HER）和氧气析出反应（OER）具有很高的活性和稳定性，在0.5 MH ₂ SO _4中的过电势仅为38 mV，在1.0 M KOH中的过电势为48 mV， 340 mV在0.1 M KOH中用于10 mA cm ^-2的OER。最终，作为双功能催化剂，组装了一个碱性电解槽，并以低电池电压提供了几乎100％的法拉第效率。我们的实验结果表明，掺入铁会扰乱甚至破坏磷化钴的周期性结构，从而导致电子结构和活性位电子密度的重新分布，而钌可以显着增强催化动力学以及电化学和机械稳定性。