Yang Xiaodong, Ouyang Bo, Shen Peiqi, Sun Yiqiang, Yang Yisong, Gao Yanan, Kan Erjun, Li Cuncheng, Xu Kun, Xie Yi
School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China.
MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
J Am Chem Soc. 2022 Jun 29;144(25):11138-11147. doi: 10.1021/jacs.2c00793. Epub 2022 Jun 8.
Developing efficient hydrogen oxidation reaction (HOR) electrocatalysts in alkaline media is of great significance for anion exchange membrane fuel cells. Herein, we report the synthesis of hollow colloidosomes composed of Ru nanocrystals based on a novel gas/liquid interface self-assembly strategy. Structural characterizations reveal that much defects are present in the building block (Ru nanocrystals) of Ru colloidosomes. Theoretical calculations suggest that the defects in the Ru structure can optimize the adsorption binding energy of reaction intermediates for the HOR. Benefiting from the assembled colloidosome and optimized electronic structure, the Ru colloidosomes exhibit remarkable HOR catalytic performance in alkaline media with a mass activity higher than that of benchmark Pt/C. Our work may shed new light on the rational design of advanced electrocatalysts with an assembled structure for energy-related applications.
在碱性介质中开发高效的氢氧化反应（HOR）电催化剂对阴离子交换膜燃料电池具有重要意义。在此，我们报道了基于一种新型气/液界面自组装策略合成由钌纳米晶体组成的中空胶体球。结构表征表明，钌胶体球的构建单元（钌纳米晶体）中存在许多缺陷。理论计算表明，钌结构中的缺陷可以优化HOR反应中间体的吸附结合能。得益于组装的胶体球和优化的电子结构，钌胶体球在碱性介质中表现出卓越的HOR催化性能，其质量活性高于基准Pt/C。我们的工作可能为合理设计用于能源相关应用的具有组装结构的先进电催化剂提供新的思路。
