As a half-reaction to obtain high-efficiency and stable water-splitting, oxygen evolution reaction (OER) is a slow-kinetics process involving a four-electron (4e^-) transfer process and therefore requires catalysts to fasten electron transfer. Here, we rationally optimized an interface material of ceria nanoparticles and nickel hydroxide by adsorbing ethylene glycol (EG-Ni(OH)₂@CeO₂), which produced ultrasmall nanosheets uniformly attached onto carbon cloth substrate. According to the characterization and density functional theory (DFT), the ethylene glycol-induced nickel-cerium interface had strong electron interaction, generating numerous of Ni^(3-\gd)+ active sites, reducing the energy reaction barrier, and promoting the electron-transport kinetics in the catalytic system. EG-Ni(OH)₂@CeO₂ showed excellent OER performance, with a low overpotential (335 mV) at 50 mA cm^-2 and a small Tafel slope (67.4 mV dec^-1). And the EG-Ni(OH)₂@CeO₂ also maintained stable for up to 60 h at 10, 20, and 30 mA cm^-2. Overall, this research shows the significance of the interface engineering of metal materials based on organic-solvent adsorption to improve the electrocatalytic OER process.

作为半反应，以获得高效率的，稳定的水分解，析氧反应（OER）是慢动力学处理涉及四电子（4E ^- ）转移过程，因此需要催化剂以紧固的电子转移。在这里，我们通过吸附乙二醇（EG-Ni（OH）₂ @CeO ₂）合理地优化了二氧化铈纳米颗粒和氢氧化镍的界面材料，从而生产出均匀附着在碳布基体上的超小纳米片。根据表征和密度泛函理论（DFT），乙二醇诱导的镍-铈界面具有很强的电子相互作用，生成大量的Ni ^{（3- \ gd）+}活性位点，减少能量反应势垒，并促进催化系统中的电子传输动力学。EG-Ni（OH）₂ @CeO ₂表现出出色的OER性能，在50 mA cm ^-2时具有较低的过电势（335 mV）和小的Tafel斜率（67.4 mV dec ^-1）。EG-Ni（OH）₂ @CeO ₂在10、20和30 mA cm ^-2时也保持稳定长达60小时。总体而言，这项研究表明了基于有机溶剂吸附的金属材料界面工程对改善电催化OER工艺的重要性。