Liang Wanyu, Wang Cheng, Li Jie, Yin Jiongting, Wu Zhengying, Li Shujin, Du Yukou
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
Jiangsu Key Laboratory for Environment Functional Materials, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
Inorg Chem. 2023 Dec 11;62(49):20072-20079. doi: 10.1021/acs.inorgchem.3c02852. Epub 2023 Nov 28.
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 mA·cm, accompanied by a small Tafel slope of 80.1 mV·dec. 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.
由金属有机框架（MOF）材料衍生而来的具有多层异质界面的中空纳米电催化剂的制备，是一种促进析氧反应（OER）的高效策略。在本研究中，我们成功合成了具有双层异质界面的Ir掺杂ZIF-67@CoFe PBA中空纳米盒。Ir-ZIF-67@CoFe PBA独特的结构为反应中间体提供了大量活性位点，提高了贵金属的利用率。此外，实验结果表明优化后的Ir-ZIF-67@CoFe PBA具有出色的电催化性能，在10 mA·cm时过电位仅为269 mV，塔菲尔斜率小至80.1 mV·dec。此外，Ir-ZIF-67@CoFe PBA中异质结与Ir之间形成的肖特基结加速了电子转移速率，与仅由ZIF-67衍生的催化剂相比，其具有卓越的催化性能。这种催化剂的独特特性具有巨大的应用价值。
