Oxygen evolution reaction (OER) has been recognized as the key role to determine the overall efficiency of hydrogen production by electrolysis of water. The development of green, low-cost and high stability electrocatalysts which can effectively reduce the reaction energy barrier is a key to promote the large-scale application of hydrogen energy. Herein, a modified transition metal oxalate loaded on nickel foam (NF), P–FeOOH@CoC₂O₄/NF heterostructure catalyst was synthesized by simple hydrothermal and electrodeposition methods. By constructing heterostructures and phosphorous doping, the morphology and electronic structure of CoC₂O₄ were optimized, thus, P–FeOOH@CoC₂O₄/NF shows excellent electrocatalytic performance, the overpotentials of 211/264/295 mV were needed to reach the current densities of 10/100/200 mA cm⁻², with a low Tafel slope of 41.33 mV dec⁻¹ and almost constant long-term stability. The results revealed that the construction of the heterostructure led to the superficial electrochemical reconstruction of the cobalt oxalate microrod, which effectually accelerated the transformation of the active species and primely realized the efficient alkaline water oxidation.

析氧反应 (OER) 已被认为是决定电解水制氢总体效率的关键作用。开发绿色、低成本、高稳定性、能有效降低反应能垒的电催化剂是推动氢能规模化应用的关键。在此，通过简单的水热和电沉积方法合成了负载在泡沫镍 (NF) 上的改性过渡金属草酸盐 P–FeOOH@CoC ₂ O _{4 /NF 异质结构催化剂。}通过构建异质结构和掺杂磷，优化了CoC ₂ O ₄的形貌和电子结构，因此，P–FeOOH@CoC ₂ O ₄/NF 显示出优异的电催化性能，需要 211/264/295 mV 的过电势才能达到 10/100/200 mA cm ^{-2的电流密度，具有 41.33 mV dec -1}的低 Tafel 斜率和几乎恒定的 long-期限稳定性。结果表明，异质结构的构建导致草酸钴微棒的表面电化学重构，有效地加速了活性物质的转化，初步实现了碱性水的高效氧化。