Wang Xiao-Li, Dong Long-Zhang, Qiao Man, Tang Yu-Jia, Liu Jiang, Li Yafei, Li Shun-Li, Su Jia-Xin, Lan Ya-Qian
Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, School of Chemistry and Materials Science, Nanjing Normal University, No. 1, Wenyuan Road, Nanjing, 210023, China.
Angew Chem Int Ed Engl. 2018 Jul 26;57(31):9660-9664. doi: 10.1002/anie.201803587. Epub 2018 May 3.
Despite wide applications of bimetallic electrocatalysis in oxygen evolution reaction (OER) owing to their superior performance, the origin of the improved performance remains elusive. The underlying mechanism was explored by designing and synthesizing a series of stable metal-organic frameworks (MOFs: NNU-21-24) based on trinuclear metal carboxylate clusters and tridentate carboxylate ligands. Among the examined stable MOFs, NNU-23 exhibits the best OER performance; particularly, compared with monometallic MOFs, all the bimetallic MOFs display improved OER activity. DFT calculations and experimental results demonstrate that introduction of the second metal atom can improve the activity of the original atom. The proposed model of bimetallic electrocatalysts affecting their OER performance can facilitate design of efficient bimetallic catalysts for energy storage and conversion, and investigation of the related catalytic mechanisms.
尽管双金属电催化因其卓越性能在析氧反应（OER）中得到广泛应用，但其性能提升的根源仍不明确。通过设计和合成一系列基于三核金属羧酸盐簇和三齿羧酸盐配体的稳定金属有机框架（MOFs：NNU - 21 - 24）来探索其潜在机制。在所研究的稳定MOFs中，NNU - 23表现出最佳的OER性能；特别是，与单金属MOFs相比，所有双金属MOFs都显示出更高的OER活性。密度泛函理论（DFT）计算和实验结果表明，引入第二个金属原子可以提高原始原子的活性。所提出的双金属电催化剂影响其OER性能的模型有助于设计用于能量存储和转换的高效双金属催化剂，并有助于研究相关催化机制。
