Ir-Doped Bilayer Heterojunction Hollow Nanoboxes for Electrocatalytic Oxygen Evolution
Wanyu Liang1, Cheng Wang1, Jie Li1, Jiongting Yin1, Zhengying Wu2（吴正颖）,* Shujin Li1*（李淑瑾）, and Yukou Du1*（杜玉扣）
1Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China
2Suzhou Univ Sci & Technol, Sch Mat Sci & Engn, Jiangsu Key Lab Environm Funct Mat, Suzhou 215009, Peoples R China
Inorg. Chem. 2023, 62, 20072−20079
Abstract: The fabrication of hollow nanoelectrocatalysts with multilayered heterogeneous interfaces, derived from metal-organic framework (MOF) materials, represents a highly efficient strategy that promotes the oxygen evolution reaction (OER). Within this research, we successfully synthesized a hollow nanobox of Ir-doped ZIF-67@CoFe PBA with bilayer heterointerfaces. The distinctive structure of Ir-ZIF-67@CoFe PBA provides a substantial number of active sites for reaction intermediates, resulting in improved utilization of precious metals. Furthermore, experimental results indicate the outstanding electrocatalytic performance of the optimized Ir-ZIF-67@CoFe PBA, as indicated by a mere 269 mV overpotential at 10 mAcm-2, accompanied by a small Tafel slope of 80.1 mVdec-1. Moreover, the Schottky junction formed between the heterojunction and Ir within Ir-ZIF-67@CoFe PBA accelerates the electron-transfer rate, contributing to its exceptional catalytic performance compared to that of a catalyst derived solely from ZIF-67. This distinctive feature of the catalyst holds tremendous application value.
链接：//pubs.acs.org/doi/10.1021/acs.inorgchem.3c02852
