Transition‐metal phosphides (TMPs) have attracted extensive attention for use in the field of full water splitting. Various methods have been investigated to obtain high catalytic activity, but in these synthetic processes other active materials are inevitably introduced to modify or load onto the surface of the TMP to further improve the catalytic performance. Herein, we describe a novel approach for preparing CoP/CoP₂ structures (650 °C) by pyrolysis of a complex formed from Co ions crosslinked with phytic acid (PA) using 2‐methylimidazole (MeIM). The integration of CoP₂ and CoP in the structures can enhance the intrinsic electrical conductivity, and facilitate electron transfer from solution to the electrode. Overpotentials of only 250 and 239 mV were required to support the current densities of 10 and 20 mA cm⁻² for the oxygen evolution reaction and hydrogen evolution reaction, respectively, demonstrating the potential of the novel material for practical overall water splitting.

中文翻译：

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高效全水分解的多晶CoP / CoP2结构

过渡金属磷化物（TMP）在全水分解领域中的使用引起了广泛关注。已经研究了各种方法以获得高催化活性，但是在这些合成方法中，不可避免地引入了其他活性材料以修饰或负载在TMP的表面上以进一步提高催化性能。本文中，我们描述了一种通过使用2-甲基咪唑（MeIM）热解由与植酸（PA）交联的Co离子形成的复合物来制备CoP / CoP ₂结构（650°C）的新方法。CoP ₂的整合结构中的CoP和CoP可以增强固有电导率，并促进电子从溶液转移到电极。仅需要250和239 mV的超电势即可分别支持10和20 mA cm ^-2的氧析出反应和氢析出反应的电流密度，证明了这种新型材料在实际的总水分解中的潜力。