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学术报告:Advanced Cathodes for Future Hydrogen Fuel Cells

发布者:系统管理员发布时间:2018-07-10浏览次数:103

人:武刚

报告题目:Advanced Cathodes for Future Hydrogen Fuel Cells

报告时间:2018年7月15下午15:00

报告地点:能源与材料创新研究院102会议室


报告人简介:



        武刚教授是电化学能源与燃料电池催化剂研究领域国际知名的学者。云南省楚雄人。他于2004年在哈尔滨工业大学电化学工程专业获得博士学位,之后在清华大学(2004-2006),美国南卡罗莱纳大学(2006-2008),美国能源部洛斯阿拉莫斯国家实验室(2008-2010)从事博士后研究工作。2010年他晋升为该国家实验室的永久研究员。他在洛斯阿拉莫斯国家实验室的燃料电池中心工作了7年,领导和参与了多项重大的课题。该中心是世界上最先进的燃料电池研究基地。2014年他加入纽约州立布法罗大学的化学工程系任助理教授(assistantprofessor)。该校的化学工程专业在美国享有盛誉 (排名为36)。自从2014年,他获得美国能源部和国家自然基金资助超过三百万美元。由于他的杰出贡献,2018年他提前两年晋升为该校的终身教授。他发展的非贵金属催化剂被广泛认为是燃料电池催化剂研究的重大突破,使昂贵的铂金催化剂能够被廉价的材料所取代成为可能。这项工作,他以第一作者于2011年发表在《科学》杂志,并受到了广泛的关注(引用超过2200次)。同时他的研究还广泛的涉及到目前的学术研究热点,可再生能源的开发和利用,特别是电化学能源转化和存储, 以及光电催化和先进材料的研究。他已经在国际学术期刊发表SCI研究论文170多篇包括 Science, JACS, Advanced Materials, Account of Chemical Research,Angew. Chem. Int. Ed., ACS Nano, Energy Environ. Sci., Nano Letters, NanoToday, Nano Energy Advanced Energy Materials公开发表专利6项; 参编学术著作8部, 在国际会议作邀请报告50余次。他的工作被引用超过13000次 [h index: 56]。他目前担任RSC Advances期刊的副编辑。


报告摘要:

Inthis presentation, I will briefly outline current proton exchange membrane fuelcell (PEMFC) technology development for transportation applications in U.S.,with a special emphasis on catalyst technologies. Generally, developing highlyefficient cathode electrocatalysts for oxygen reduction reaction (ORR) in acidmedia is crucial for promoting PEMFCs into the market. To significantly reduce the economic and environmental costs of fuel celltechnologies for transportation, limited Pt catalysts must be replaced byplatinum-group-metal (PGM)-free catalysts derived from earth-abundant elements.Therefore, there is a critical need to continuously develop high-performancePGM-free cathode catalyst with significant improved activity, stability, andMEA performance in near future. Relative to the extensively exploredalkaline media, the greater challenge for PGM-freeORR catalysis is in the acidic electrolytes that present more sluggish kineticsand a corrosive environment for PGM-free catalysts. Compared to otherstudied materials (oxides, sulfides, carbides), carbon-based catalysts oftenpossess many advantages because of their excellent electrical conductivity,high surface areas, low-cost, and easiness of functionality. However, properdoping with heteroatoms (e.g., N, S,P) and transition metals (e.g., Fe,Co, or Mn) to modify the electronic and geometric structures of carbon is thekey to enhancing catalytic performance. Herein, we introduce a new class of high-performance atomic iron dispersedcarbon catalysts through controlled chemical doping of Fe ions into zinc-zeoliticimidazolate framework (ZIF), a type ofmetal-organic framework (MOF). The novel synthetic chemistry enablesaccurate size control of Fe-doped ZIF catalyst particles with a wide range from20 to 1000 nm without changing chemical properties, which provides a greatopportunity to increase the density of active sites exclusively determined bythe catalyst particle size. The best performing catalyst, with optimalmorphology and structure has , achieved a new performance milestone for the ORRin challenging acidic media including a half-wave potential of 0.87 V vs RHE, comparable with state-of-the-artPt/C. The high-performance new atomic iron-rich MOF catalysts hold greatpromise to completely replace Pt for future PEM fuel cells.