电催化剂
材料科学
多孔性
化学工程
电化学
金属有机骨架
镍
热液循环
电导率
比表面积
电流密度
析氧
兴奋剂
纳米技术
催化作用
化学
电极
物理化学
光电子学
冶金
复合材料
有机化学
工程类
物理
吸附
量子力学
作者
Guoqing Yuan,Jie Bai,Tianning Zhou,Yaqiong Gong
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:51 (22): 8832-8839
被引量:7
摘要
In recent years, Co-based metal-organic frameworks (Co-MOFs) have received significant research interest because of their large specific surface area, high porosity, tunable structure and topological flexibility. However, their comparatively weak electrical conductivity and inferior stability drastically restrict the application of Co-MOFs in the synthesis of electrocatalysts. In this study, ZIF-67 was grown on nickel foam by a room temperature soaking method, and then Ir-Co(OH)2@ZIF-67/NF was assembled by a hydrothermal method. The prepared Ir-Co(OH)2@ZIF-67/NF nanosheets exhibit remarkable conductivity, larger electrochemical active surface area and wider electron transport channels. Only ultralow overpotentials of 198 mV, 263 mV, and 300 mV were needed for Ir-Co(OH)2@ZIF-67/NF to reach the current densities of 10 mA cm-2, 50 mA cm-2, 100 mA cm-2, meanwhile, no obvious degradation of the current density at 10 mA cm-2 was observed for about 16 h. This work may provide a promising strategy for developing high-performance MOF-derived materials as electrocatalysts for the OER under alkaline conditions.
科研通智能强力驱动
Strongly Powered by AbleSci AI