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Oxygen Electrocatalysis by Transition Metal Spinel Oxides

作者:时间:2019-11-29点击数:

人:Xu Zhichuan(徐梽川)教授

1EB98

徐梽川教授,就职于新加坡南洋理工大学材料科学与工程学院、太阳能能源实验室和能源研究中心,博士生导师。英国皇家化学学会会士 (FRSC)。连续2018、2019年入选科睿唯安“全球高被引顶尖科学家” (top 1%) 。先后得获兰州大学学士和博士学位,博士期间先后在中科院物理研究所和美国布朗大学交流, 2007-2009年在美国纽约州立大学任助理研究员,2009-2012年在麻省理工学院从事博士后研究工作,新加坡南洋理工大学终身教职。主要从事能源电化学方面的研究,是国际电化学学会、电化学协会和美国科学促进会成员,也是电化学协会新加坡分会副主席,目前担任多个国际知名学术期刊的编辑和编委,包括Nano-Micro Letters副主编、Electrochimica Acta特邀编辑、Chemistry-A European Journal特邀编辑和Current Opinion in Electrochemistry发展编辑。此外,先后在Nature Energy、Nature Catalysis、Chem. Soc. Rev.、Angew. Chem. Int. Ed.、Adv. Mater.等国际知名期刊上发表了很多非常重要的研究工作。

报告摘要:Exploring efficient and low cost oxygen electrocatalysts for ORR and OER is critical for developing renewable energy technologies like fuel cells, metal-air batteries, and water electrolyzers. This presentation will presents a systematic study on oxygen electrocatalysis (ORR and OER) of transition metal spinel oxides. Starting with a model system of Mn-Co spinel, the presentation will introduce the correlation of oxygen catalytic activities of these oxides and their intrinsic chemical properties. The catalytic activity was measured by rotating disk technique and the intrinsic chemical properties were probed by synchrotron X-ray absorption techniques. It was found that molecular orbital theory is able to well-explain their activities. The attention was further extended from cubic Mn-Co spinels to tetragonal Mn-Co spinels and it was found that the molecular theory is again dominant in determining the catalytic activies. This mechanistic principle is further applied to explain the ORR/OER activities of other spinels containing other transition metals (Fe, Ni, Zn, Li, and etc.). The talk further gives insight on surface reconstruction on spinel oxides and how the bulk properties affect such reconstruction during OER.

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时间:2019121日(星期日)上午10:30

地点:石湖校区逸夫楼A212室

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