State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , P. R. China.
Laboratory of Clean Energy Chemistry and Materials, State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics Chinese Academy of Sciences , Lanzhou 730000 , P. R. China.
ACS Appl Mater Interfaces. 2019 Oct 30;11(43):39841-39847. doi: 10.1021/acsami.9b12221. Epub 2019 Oct 21.
Developing hollow self-supported nanotube arrays with hierarchical microporous and abundant multiactive sites shows great promise for oxygen evolution reaction (OER) electrocatalysis. Herein, a facile and low-cost strategy of NiCoS hollow nanotubes arrays decorated with CeO nanoparticles (NPs) assembled on a flexible support carbon cloth (CC) for enhanced OER performance is reported. The obtained hierarchical nanoarrays CeO/NiCoS/CC exhibited excellent activity toward OER with an overpotential (270 mV) at 10 mA cm, relatively weak Tafel slope, and distinguished durability. CeO/NiCoS/CC nanoarrays not only provide fast electronic transmission and well-defined connection to the substrate but also defective sites and electron transfer by the introduction of CeO NPs. This new strategy was offered to construct low-cost and effectively hierarchical structural electrocatalysts containing rare-earth species.
具有分级微孔和丰富多相活性位的中空自支撑纳米管阵列在氧析出反应（OER）电催化方面显示出巨大的应用前景。在此，报道了一种简便且低成本的策略，即将 CeO 纳米颗粒（NPs）组装在柔性支撑碳纤维布（CC）上的 NiCoS 中空纳米管阵列上，以提高 OER 性能。所获得的分级纳米阵列 CeO/NiCoS/CC 对 OER 表现出优异的活性，在 10 mA cm 下的过电势（270 mV），相对较弱的塔菲尔斜率和出色的耐久性。CeO/NiCoS/CC 纳米阵列不仅通过引入 CeO NPs 提供了快速的电子传输和与基底的明确连接，还提供了缺陷位和电子转移。该新策略为构建包含稀土物种的低成本、高效分级结构电催化剂提供了一种思路。
