Li Jiyu, Wang Zeyan, Wang Peng, Zheng Zhaoke, Liu Yuanyuan, Cheng Hefeng, Huang Baibiao
State Key Laboratory of Crystal Materials, Shandong University Jinan 250100 China
RSC Adv. 2022 May 5;12(22):13639-13644. doi: 10.1039/d2ra00968d.
In this study, a novel NiCoP-CeO composite was constructed on a Ni foam by a simple hydrothermal method and thermal phosphating strategy. In the OER test, NiCoP-CeO exhibited a low overpotential of 217 mV at 10 mA cm, 45 mV dec of Tafel slopes. With the help of theoretical calculations and experimental characterization, the reason for performance improvement was analyzed in depth. The results show that CeO leads to a confinement effect, maintaining the nanosheet morphology of NiCo-LDHs, which contributes to sustaining the catalyst in favourable contact with HO and minimizing the OER potential. Furthermore, by loading CeO onto NiCoP, the hydrophilicity of the catalyst is significantly enhanced. Our work provides an ingenious synthesis strategy for the preparation of efficient and inexpensive electrocatalytic materials.
在本研究中，通过简单的水热法和热磷化策略在泡沫镍上构建了一种新型的NiCoP-CeO复合材料。在析氧反应（OER）测试中，NiCoP-CeO在10 mA cm时表现出217 mV的低过电位，塔菲尔斜率为45 mV dec。借助理论计算和实验表征，深入分析了性能提高的原因。结果表明，CeO导致限域效应，保持了NiCo-LDHs的纳米片形态，这有助于使催化剂与H2O保持良好接触并使OER电位最小化。此外，通过将CeO负载到NiCoP上，催化剂的亲水性显著增强。我们的工作为制备高效且廉价的电催化材料提供了一种巧妙的合成策略。
