• 【名师讲座】催化反应中金属催化剂的动态行为和活性结构:原位电镜研究

    发布日期:2022-07-05     浏览次数:次   




    报告时间:2022-07-09 10:00

    报告人: 黄兴 教授







    The active state of catalysts tends to be metastable and adopts to the chemical potential of the surrounding gas atmosphere. In this context, standard approaches via characterizing and comparing the catalysts ex situ prior to and after catalytic reaction may fail to provide relevant insights (since the active surface motifs might be changed and/or damaged during transfer from working state to non-catalytic conditions), hampering rational improvement of heterogeneous catalysts via establishing robust structure-activity relationships. To gain a realistic understanding of the functional state of a catalysts and the underlying reaction mechanisms, it is important to examine the catalysts under relevant reaction conditions. In situ / operando TEM has emerged as a powerful method for studying the atmosphere and temperature induced dynamic changes of catalysts. It can provide real-time, spatially-resolved atomic structures of working catalysts while detecting catalytic activity simultaneously under relevant conditions, thus allowing direct establishment of structure-performance relationships. In this talk, I will demonstrate the use of in situ /operando TEM in studying the dynamic behavior and active state of metal catalysts under reaction conditions. Several examples will be given, including hydrogen oxidation over Cu, methane oxidation over Pd, and so forth. In addition, I will show some of our recent results concerning the observations of dynamic interplay between metal and support under relevant redox conditions.



    黄兴, 福大化学学院教授、博士生导师。2013年毕业于中国科学院理化技术研究所,获得博士学位;2013-2018年在德国马普学会弗里茨-哈勃研究所(Fritz-Haber Institute)和化学能源转换所(MPG for Chemical Energy Conversion)从事原位透射电镜在材料、催化领域的研究工作;2018-2020年在瑞士苏黎世联邦理工学院(ETH Zurich)光学/电子显微学科学中心工作,继续从事环境中催化材料的动态行为、表界面结构以及构效关系的原位电镜研究;2020年获国家高层次人才引进计划以及福建省闽江特聘教授资助,加入职福州大学化学学院,成立课题组,任独立PI;迄今为止共发表学术论文100余篇,包括ScienceNat. CatalNat. Commun.Adv. Mater.Angew. Chem. Int. Ed.Adv. Funct. Mater.Nano Lett.ACS Nano等。



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