Jiang Jingyun, Chang Liangyu, Zhao Wancheng, Tian Qingyong, Xu Qun
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, Henan, China.
Department of Chemistry, Louisiana State University, Baton Rouge, 70803, Louisiana, USA.
Chem Commun (Camb). 2019 Sep 4;55(68):10174-10177. doi: 10.1039/c9cc05389a. Epub 2019 Aug 7.
A tri-metal material system of FeCoNi-based nitro-sulfide (FeCoNi-NS) hierarchical structure has been successfully synthesized via a deep eutectic solvent annealing process. The as-prepared FeCoNi-NS possesses interesting N,S-binary heteroatoms evenly doped with Fe, Co, and Ni. By taking advantage of the unique structure including multi-metal sites, high BET area and porous structures, the as-prepared FeCoNi-NS exhibited excellent oxygen evolution reaction (OER) performance, achieving a current density of 10 mA cm at an overpotential of 251 mV and a low Tafel slope of 58 mV dec in 1 M KOH. Furthermore, FeCoNi-NS also demonstrated highly efficient mass/charge transportation, long-term stability with 2% deactivation after ten hours continuous operation and high faradaic efficiency of 98%. Such a facile synthetic strategy is applicable to the fabrication of more mutil-metal hierarchical structures for energy conversion and storage.
通过深共熔溶剂退火工艺成功合成了一种具有分级结构的基于FeCoNi的氮硫化物（FeCoNi-NS）三金属材料体系。所制备的FeCoNi-NS具有有趣的N、S二元杂原子，它们均匀地掺杂有Fe、Co和Ni。利用其独特的结构，包括多金属位点、高比表面积和多孔结构，所制备的FeCoNi-NS表现出优异的析氧反应（OER）性能，在1 M KOH中，在251 mV的过电位下实现了10 mA cm的电流密度，并且具有58 mV dec的低塔菲尔斜率。此外，FeCoNi-NS还表现出高效的质量/电荷传输、十小时连续运行后2%失活的长期稳定性以及98%的高法拉第效率。这种简便的合成策略适用于制备更多用于能量转换和存储的多金属分级结构。
