In situ growth of hierarchical bimetal-organic frameworks on nickel-iron foam as robust electrodes for the electrocatalytic oxygen evolution reaction

Jia Wang; Yu Jiang; Chunbo Liu; Yuanyuan Wu; Bo Liu; Wei Jiang; Hongji Li; Guangbo Che

doi:10.1016/j.jcis.2022.01.140

In situ growth of hierarchical bimetal-organic frameworks on nickel-iron foam as robust electrodes for the electrocatalytic oxygen evolution reaction

J Colloid Interface Sci. 2022 May 15:614:532-537. doi: 10.1016/j.jcis.2022.01.140. Epub 2022 Jan 25.

Authors

Jia Wang¹, Yu Jiang¹, Chunbo Liu², Yuanyuan Wu¹, Bo Liu¹, Wei Jiang³, Hongji Li⁴, Guangbo Che¹

Affiliations

¹ Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China.
² Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China; College of Environmental Science and Engineering, Jilin Normal University, Siping, 136000, PR China. Electronic address: chunboliu@jlnu.edu.cn.
³ Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China; College of Environmental Science and Engineering, Jilin Normal University, Siping, 136000, PR China. Electronic address: jiangwjlnu@163.com.
⁴ Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China; College of Environmental Science and Engineering, Jilin Normal University, Siping, 136000, PR China.

PMID: 35121511
DOI: 10.1016/j.jcis.2022.01.140

Abstract

Evidence shows that self-supported electrocatalysts are crucial role to solving environmental and energy issues. In this study, self-supported 2D metal-organic framework (MOF) nanosheets grown in situ on nickel-iron foam (NFF) were prepared by a one-step solvothermal process. The hierarchical nanostructure possesses a high specific surface area and abundant metal sites, which are beneficial for electrocatalytic reactions. In the electrocatalytic oxygen evolution reaction (OER), the optimal NiFe(20Ni)-MOF/NFF can drive current densities of 10, 50 and 100 mA cm^-2 at small overpotentials of 226, 277 and 294 mV, respectively. According to the characterization results, the OER performance is improved by the synergistic action of bimetals and the generation of hydroxides/oxyhydroxides. This work provides new insights into fabricating self-supported MOF-based electrodes for water splitting that are simple and highly efficient.

Keywords: Electrocatalysis; MOFs; Oxygen evolution reaction; Self-supported electrode.