Wang Ziqiang, Xu Shan, Mao Qiqi, Deng Kai, Xu You, Wang Hongjing, Yu Hongjie, Wang Liang
State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
Inorg Chem. 2023 Aug 21;62(33):13537-13543. doi: 10.1021/acs.inorgchem.3c01975. Epub 2023 Aug 4.
Designing two-dimensional (2D) materials functionalized with organic molecules is an effective tactic to enhance catalytic performances for the oxygen reduction reaction (ORR). Herein, we synthesize Pd metallene with in situ modification of polyethylenimine-ethylenediamine (Pd@PEI-EDA metallene), in which PEI-EDA serves as both the structure-directing agent and modifier. Pd@PEI-EDA metallene has ample active sites and tuneable electronic structures due to ultrathin nanosheets with abundant wrinkles and interfacial structure. In contrast with commercial Pd/C and Pt/C, Pd@PEI-EDA metallene displays preferable catalytic ORR performance under alkaline conditions. This work offers an in situ interface engineering tactic for the preparation of 2D polymer-metal electrocatalysts to boost the ORR performance.
设计用有机分子功能化的二维（2D）材料是提高氧还原反应（ORR）催化性能的有效策略。在此，我们通过聚乙烯亚胺-乙二胺的原位修饰合成了钯金属烯（Pd@PEI-EDA金属烯），其中PEI-EDA既是结构导向剂又是改性剂。由于具有大量褶皱和界面结构的超薄纳米片，Pd@PEI-EDA金属烯具有丰富的活性位点和可调节的电子结构。与商业Pd/C和Pt/C相比，Pd@PEI-EDA金属烯在碱性条件下表现出更好的ORR催化性能。这项工作为制备二维聚合物-金属电催化剂以提高ORR性能提供了一种原位界面工程策略。
