CO2-Assisted synthesis of a crystalline/amorphous NiFe-MOF heterostructure for high-efficiency electrocatalytic water oxidation

Yifan Li; Wenjie Ma; Huanhuan Yang; Qingyong Tian; Qun Xu; Buxing Han

doi:10.1039/d2cc01163h

CO₂-Assisted synthesis of a crystalline/amorphous NiFe-MOF heterostructure for high-efficiency electrocatalytic water oxidation

Chem Commun (Camb). 2022 Jun 14;58(48):6833-6836. doi: 10.1039/d2cc01163h.

Authors

Yifan Li¹, Wenjie Ma², Huanhuan Yang², Qingyong Tian², Qun Xu^{1

2}, Buxing Han³

Affiliations

¹ College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, P. R. China. qunxu@zzu.edu.cn.
² Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450052, P. R. China. manwenjie@zzu.edu.cn.
³ Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China. hanbx@iccas.ac.cn.

PMID: 35616081
DOI: 10.1039/d2cc01163h

Abstract

Modulating the crystalline phase and structure of metal organic frameworks (MOFs) for superior electrocatalytic oxygen evolution reaction (OER) performance is a significant but challenging topic. Herein, a facile CO₂-assisted strategy is reported to fabricate a crystalline/amorphous NiFe-based MOF heterostructure (c/a-NiFe-MOF) that exhibited excellent OER performance with a low overpotential of only 236 mV at a current density of 10 mA cm^-2 and a small Tafel slope of 30 mV dec^-1. This work provides new insights for CO₂-assisted preparation of novel MOF heterostructures with diverse crystalline phases and sheds light on the rational design of highly efficient OER electrocatalysts.