塔菲尔方程
过电位
电催化剂
析氧
X射线光电子能谱
材料科学
化学工程
透射电子显微镜
扫描电子显微镜
催化作用
分解水
纳米技术
化学
电极
物理化学
复合材料
电化学
光催化
有机化学
工程类
作者
Qibing Dong,Chao Shuai,Zunli Mo,Ruibin Guo,Nijuan Liu,Guigui Liu,Jia Wang,Wentong Liu,Ying Chen,Jingjing Liu,Ye Jiang,Qinqin Gao
出处
期刊:CrystEngComm
[The Royal Society of Chemistry]
日期:2021-01-01
卷期号:23 (5): 1172-1180
被引量:21
摘要
A Ni-based metal organic framework (Ni-BDC) and subsequently derived NiFe-LDH were studied to overcome the defect of the low availability of active sites for the oxygen evolution reaction (OER) during the water splitting process. This work reported NiFe-LDH nanosheets with an ultra-thin structure through an in situ surface-conversion derived from Ni-BDC. The unique structure and characteristic morphology were confirmed using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy, and the OER activities of the catalysts were systematically studied. The obtained results indicated that the synthesized Ni-BDC@NiFe-LDH-2 showed excellent OER activity, with a low overpotential of 272 mV at a current density of 10 mA cm−2, a small Tafel slope of 45 mV dec−1, and excellent stability, owing to the addition of abundant metal sites and the expansion of the electron transport channels during the conversion process to form the ultra-thin layer structure. This work provides a novel strategy for the application, design, and manufacture of metal organic framework (MOF)-based high-efficiency active materials.
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