Ir-Doped Core-Shell Hollow Heterogeneous Nanospindles for Electrocatalytic Oxygen Evolution Reaction
Wanyu Liang1, Yanghanqi Li1, Nannan Zhang1,Jie Li1, Shujin Li1（李淑瑾）*, Zhengying Wu2（吴正颖）*, Yukou Du1（杜玉扣）*
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123,China
2Jiangsu Key Laboratory for Environment Functional Materials, School of Materials Science andEngineering, Suzhou University of Science and Technology,Suzhou 215009, China
Inorg. Chem. 2024, 63, 14691−14698
Abstract: By utilizing Metal–organic framework (MOF) materials as a base, constructing electrocatalysts with heterogeneous structures offers advantages for catalyzing water splitting. In this study, a hollow heterogeneous nanocatalyst, Ir-MIL-88A@NiFe-LDHs, was prepared by growing a layered double hydroxides (LDHs) shell on MIL-88A substrate. The catalyst shows excellent oxygen evolution reaction (OER) performance in a 1.0 M KOH solution, requiring only 217 mV overpotential to achieve a current density of 10 mA cm-2 with a Tafel slope of 62.18 mV dec–1, indicating significant electrocatalytic performance and reaction kinetics characteristics. Furthermore, long-term OER testing also demonstrates the catalyst’s outstanding stability. Emphasizing the interfacial interaction between MOF and LDHs, as well as the synergistic effect among Ni, Fe, and Ir elements, the study highlights how these factors collaboratively control the local electronic structure of the hollow Ir-MIL-88A@NiFe-LDHs, resulting in an efficient MOF-derived electrocatalyst.
链接：//pubs.acs.org/doi/10.1021/acs.inorgchem.4c02285
