It is very important, but also challenging to produce high-activity, high durability and affordable non-noble-metal-bifunctional-electrocatalysts for sustainable energy application. Here, one-pot synthesized iron covalent porphyrin polymers (FePor-CPP), with carefully placed Fe, N atoms, a regular porous structure, Co₃[Co(CN)₆]₂ and NaH₂PO₂ precursors were carbonized into N,P-doped carbon nanospheres with the active species of both bimetallic CoFe phosphides and CoC_x nanoparticles (denoted as CoC_x/(Co_0.55Fe_1.945)₂P@C). By employing the CoC_x/(Co_0.55Fe_1.945)₂P@C as oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrode catalysts, superior catalytic activity is achieved with E_1/2 of 0.84 V for ORR, and overpotential of 0.39 V at 10 mA cm⁻² for OER in an alkaline medium, respectively. Furthermore, CoC_x/(Co_0.55Fe_1.945)₂P@C as air electrode for rechargeable Zn-air battery shows power density as high as 131 mW cm⁻² and charge-discharge cycle stability, and this suggests the potential application of CoC_x/(Co_0.55Fe_1.945)₂P@C in energy transformation systems. The high electrocatalytic performances are revealed to originate from the change of electronic structure of bimetallic (Co_0.55Fe_1.945)₂P via introducing P into the Co_0.55Fe_1.945 alloy, resulting in a decreased energy gap of CoC_x/(Co_0.55Fe_1.945)₂P@C relative to that of CoC_x/Co_0.55Fe_1.945@C. This work proposes a versatile strategy to develop multifunctional non-precious catalysts for this kind of energy-related electrocatalytic reactions.

生产用于可持续能源应用的高活性，高耐久性和价格合理的非贵金属双功能电催化剂是非常重要的，但同时也具有挑战性。在这里，一锅合成的铁共价卟啉聚合物（FePor-CPP），经过精心放置的Fe，N原子，规则的多孔结构，Co ₃ [Co（CN）₆ ] ₂和NaH ₂ PO ₂前驱体被碳化为N，具有双金属CoFe磷化物和CoC _x纳米颗粒（表示为CoC _x /（Co _0.55 Fe _1.945）₂ P @ C）的活性物质的P掺杂碳纳米球。通过使用CoC _x /（Co_0.55 Fe _1.945）₂ P @ C作为氧还原反应（ORR）和氧释放反应（OER）电极催化剂，对于ORR，E _1/2为0.84 V，在10 mA cm时的过电势为0.39 V，可实现优异的催化活性对于碱性介质中的OER分别为^-2。此外，作为可充电锌空气电池的空气电极，CoC _x /（Co _0.55 Fe _1.945）₂ P @ C显示出高达131 mW cm ^-2的功率密度和充放电循环稳定性，这表明CoC的潜在应用_x /（Co _0.55 Fe _1.945）₂能量转换系统中的P @ C。通过将P引入Co _0.55 Fe _1.945合金中，揭示了高电催化性能源自双金属（Co _0.55 Fe _1.945）₂ P的电子结构变化，从而导致CoC _x /（Co _0.55 Fe _1.945）的能隙减小。）相对于CoC _x / Co _0.55 Fe _1.945 @C为₂ P @ C。这项工作提出了一种通用的策略，以开发用于这类与能量相关的电催化反应的多功能非贵金属催化剂。