Water electrolysis is an emerging energy conversion technology, which is significant for efficient hydrogen (H2) production. Based on the high-activity transition metal ions and metal alloys of ultrastable bifunctional catalyst, the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are the key to achieving the energy conversion method by overall water splitting (OWS). This study reports that the Co-based coordination polymer (ZIF-67) anchoring on an indium-organic framework (InOF-1) composite (InOF-1@ZIF-67) is treated followed by carbonization and phosphorization to successfully obtain CoP nanoparticles-embedded carbon nanotubes and nitrogen-doped carbon materials (CoP-InNC@CNT). As HER and OER electrocatalysts, it is demonstrated that CoP-InNC@CNT simultaneously exhibit high HER performance (overpotential of 153 mV in 0.5 m H2SO4 and 159 mV in 1.0 m KOH) and OER performance (overpotential of 270 mV in 1.0 m KOH) activities to reach the current density of 10 mA cm-2. In addition, these CoP-InNC@CNT rods, as a cathode and an anode, can display an excellent OWS performance with η10 = 1.58 V and better stability, which shows the satisfying electrocatalyst for the OWS compared to control materials. This method ensures the tight and uniform growth of the fast nucleating and stable materials on substrate and can be further applied for practical electrochemical reactions.

中文翻译：

---

用于高效整体水分解的双金属金属有机框架衍生的磷化钴复合材料。

水电解是一种新兴的能量转换技术，对于高效生产氢气具有重要意义。基于超稳定双功能催化剂的高活性过渡金属离子和金属合金，析氢反应（HER）和析氧反应（OER）是实现全水分解（OWS）能量转换方法的关键。该研究报告称，将钴基配位聚合物（ZIF-67）锚定在铟有机骨架（InOF-1）复合材料（InOF-1@ZIF-67）上，然后进行碳化和磷化处理，成功获得CoP纳米颗粒。嵌入碳纳米管和氮掺杂碳材料（CoP-InNC@CNT）。作为HER和OER电催化剂，CoP-InNC@CNT同时表现出较高的HER性能（在0.5 m H2SO4中为153 mV，在1.0 m KOH中为159 mV）和OER性能（在1.0 m KOH中为270 mV）活动达到10 mA cm-2的电流密度。此外，这些CoP-InNC@CNT棒作为阴极和阳极，可以表现出优异的OWS性能，η10 = 1.58 V和更好的稳定性，这表明与对照材料相比，OWS电催化剂令人满意。该方法保证了快速成核且稳定的材料在基底上紧密且均匀的生长，可进一步应用于实际电化学反应。