Constructing MIL-53(Fe)@ZIF-67(Co) binary metal-organic framework hierarchical heterostructure electrodes for efficient oxygen evolution

Dan Wen; Yan Ma; Guomei Mu; Qiuping Huang; Xuefeng Luo; Dunmin Lin; Chenggang Xu; Fengyu Xie; Guangzhao Wang; Wenhan Guo

doi:10.1039/d3dt00516j

Constructing MIL-53(Fe)@ZIF-67(Co) binary metal-organic framework hierarchical heterostructure electrodes for efficient oxygen evolution

Dalton Trans. 2023 Aug 8;52(31):10662-10671. doi: 10.1039/d3dt00516j.

Authors

Dan Wen¹, Yan Ma¹, Guomei Mu¹, Qiuping Huang¹, Xuefeng Luo², Dunmin Lin¹, Chenggang Xu¹, Fengyu Xie¹, Guangzhao Wang², Wenhan Guo³

Affiliations

¹ College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, China. xiefengyu@sicnu.edu.cn.
² Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, School of Electronic Information Engineering, Yangtze Normal University, Chongqing, 408100, China. wangyan6930@126.com.
³ School of Physical Science, Great Bay University, Dongguan, Guangdong, 523000, China. whguo@gbu.edu.cn.

PMID: 37494114
DOI: 10.1039/d3dt00516j

Abstract

Improving the efficiency of the anodic oxygen evolution reaction (OER) is important to solve the global energy crisis and greenhouse gas emission problems. In this paper, a preparation method for a MIL-53(Fe)@ZIF-67(Co) composite electrode is proposed. The hierarchical structure formed by the combination of MIL-53(Fe) and ZIF-67(Co) provides a rich channel for the transport of electrons and mass in the OER process. XPS analysis and DFT calculations revealed that Fe electrons in MIL-53(Fe) were transferred to Co in ZIF-67(Co) through O, which confirmed the rapid charge transfer effect of this transport channel. The MIL-53(Fe)@ZIF-67(Co) electrode has significant OER performance. When the current density reaches 10 mA cm^-2, the overpotential is only 193 mV. This study inaugurates a new way for the rational design of a multiphase interface and the construction of new MOF channel structures.