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美国北德克萨斯州大学夏振海教授做客第408期化苑讲坛
发布时间:2019/04/22 17:49:00    作者:   来源:    点击率:

报告题目Guiding Principles of Carbon-Based Materials as High-Performance Catalysts for Clean Energy Conversion

人:夏振海教授

报告时间:2019424日(周三)上午9:00

报告地点:化学楼一号会议室

人:王帅教授

报告人简介:

夏振海现为美国北德克萨斯州大学(University of North Texas)工学院材料科学与工程系和理学院化学系双聘终身教授,西北工业大学材料学院讲座教授,博士生导师,2017年国家千人计划入选者,教育部“长江学者”讲座教授。

目前的主要研究领域为材料基因组工程及多尺度计算模拟(DFT,MD,FEM),新能源材料(如高效燃料电池、超级电容、金属空气电池,CO2 转化等纳米催化材料)、仿生材料(如仿生自清洁材料及器件,强韧性纳米仿生材料)、先进结构材料(纳米复合材料,高熵合金)。共发表包括ScienceNature等在内的期刊论文160余篇,其中有15篇论文被科学索引(SCI)评为所在领域高引用率/热点论文(Top 0.1%)。他引13000余次,H-index 42。其研究成果也受到包括美国《纽约时报》等许多商业报刊杂志的关注和报道。独著英文专著1部,由国际著名出版社Wiley 出版,合著专著5曾获德国洪堡奖学金,2015年获得美国 “纳米科学研究领导奖”,2019年获得国际材料研究联合会(IUMRSSOMIYA 奖。担任美国机械工程师学会多功能材料专业委员会主席,《能源材料前沿》(Frontiers in Energy Materials)副主编

报告简介:

Clean and sustainable energy technologies, such as fuel cells, metal-air batteries, water-splitting and solar cells, are currently under intensive research and development because of their high efficiency, promising large-scale applications, and virtually no pollution or greenhouse gas emission. At the heart of these energy devices, there are critical chemical reactions: oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and carbon dioxide reduction reaction (CO2RR) that determine the efficiencies of energy conversion and storage. These reactions, however, are sluggish and require noble metals (e.g., platinum) or their oxides as catalysts. The limited resources and high cost of platinum have hampered the commercialization of these technologies. Therefore, it is necessary to search for alternative materials to replace Pt. Carbon nanomaterials, such as carbon nanotubes (CNTs) and graphene, are appealing as an alternative for metal-free catalytic applications because of their structures and excellent properties. Although the superior catalytic capabilities of heteroatom-doped carbon nanomaterials for ORR have been demonstrated, trial-and-error approaches are still used to date for the development of highly-efficient catalysts. To rationally design a catalyst, it is critical to understand which intrinsic material characteristics, or descriptors that control catalysis. Through first-principles calculations, we have identified a material property that serves as the activity descriptor for predicating ORR and OER activities, and established a volcano relationship between the descriptor and the bifunctional activities of the carbon-based nanomaterials. Such descriptor enables us to design new metal-free catalysts with enhanced ORR and OER activities, even better than those reported for platinum-based metal catalysts. The similar principles were applied to covalent organic framework (COF) single-atom catalysts for ORR, OER and CO2RR. The design principles can be used as a guidance to develop various new carbon-based materials for clean energy conversion and storage.


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