Exploiting low cost and durable electrocatalysts with high efficiency for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) is of great significance for energy conversion and storage applications. Herein, a hybrid electrocatalyst of FeCo alloy nanoparticles embedded in a porous N-doped carbon was prepared via a pyrolysis process of low-cost melamine sponge and mass-produced metal–polyphenol network. Benefting from the metal coordination of metal–polyphenol network and abundant N source of melamine sponge, the metal–N moiety and FeCo alloy nanoparticles (wtih a diameter around 50 nm) encapsulated in a N-doped graphene-like carbon layer were formed in-situ. Such intimate integration of graphene-like carbon-encapsulated FeCo alloys, metal–N active species, and porous structure is conducive to improve the catalytic activity and increase the catalytic durability in alkaline media. As a consequence, the as-prepared electrocatalyst exhibits the pronounced activity toward ORR, OER, and HER simultaneously under alkaline condition, particularly on the performances of potential, stability, and methanol tolerance.

开发用于氧还原反应（ORR），析氧反应（OER）和析氢反应（HER）的高效，低成本，耐用的电催化剂对于能量转换和存储应用具有重要意义。在此，通过低成本三聚氰胺海绵和大规模生产的金属-多酚网络的热解过程，制备了嵌入多孔N掺杂碳中的FeCo合金纳米粒子的杂化电催化剂。从金属-多酚网络的金属配位和三聚氰胺海绵的丰富氮源中受益，将金属-N部分和FeCo合金纳米粒子（直径约50 nm）封装在N中原位形成掺杂石墨烯的碳层。石墨烯状碳包裹的FeCo合金，金属-N活性物种和多孔结构的这种紧密结合有利于提高催化活性并提高在碱性介质中的催化耐久性。结果，所制备的电催化剂在碱性条件下同时对ORR，OER和HER表现出显着的活性，特别是在电势，稳定性和甲醇耐受性方面。