Low-cost and high-efficiency transition metal oxide catalysts are desired for high-efficiency water splitting technology. An applying magnetic field (MF) enhancement method is presented to improve the oxygen evolution reaction (OER) performance of NiCo-spinel magnetic catalysts, the enhancement of OER performance depends on the applied MF strength and magnetic properties of catalysts. The maximum enhanced current density percentage of about 90.6%, 93.7%, and 70.1% are obtained by applying 105 mT MF in NiCo₂O₄, Ni_1.5Co_1.5O₄, and Ni₂CoO₄, respectively. The enhanced performance originates from the improved intrinsic activity and facilitated mass transfer process. The MF decreases the activation energy, which then leads to the improvement of intrinsic activity. This work provides more basic data for further gaining into the enhanced mechanism by applying the MF, meanwhile, the strategy can be used to enhance the performances of other electrocatalysts.

高效分解水技术需要低成本、高效的过渡金属氧化物催化剂。提出了一种应用磁场（MF）增强方法来提高NiCo-尖晶石磁性催化剂的析氧反应（OER）性能，OER性能的增强取决于所应用的MF强度和催化剂的磁性能。通过在 NiCo ₂ O ₄、Ni _1.5 Co _1.5 O ₄和 Ni ₂ CoO _{4 中}应用 105 mT MF 获得约 90.6%、93.7% 和 70.1% 的最大增强电流密度百分比， 分别。增强的性能源于改进的内在活性和促进的传质过程。MF 降低了活化能，从而导致内在活性的提高。这项工作为通过应用MF进一步获得增强机制提供了更多基础数据，同时该策略可用于增强其他电催化剂的性能。