关于举行纽约州立大学布法罗分校武刚教授学术报告会的通知 发布者:魏巍   发布时间:2018-05-09   浏览次数:525

报告题目:Precious metal-free Electrocatalysts for High-Efficiency Ammonia Production from Water and Nitrogen(用于氮还原合成氨的高效非贵金属电催化剂)

报 告 人:武刚 教授

报告时间2018524日(星期四)上午9:00-10:30

报告地点16号楼二楼214会议室

欢迎广大师生踊跃参加!

化学与化工学院

201859

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。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(assistant professor)。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 (associate professor)。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)。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, Nano Today, Nano Energy Advanced Energy Materials。公开发表专利6; 参编学术著作8, 在国际会议作邀请报告50余次。他的工作被引用超过13000 [h index: 56]

报告摘要:

Precious metal-free Electrocatalysts for High-Efficiency Ammonia Production from Water and Nitrogen

Gang. Wu, Associate Professor

Department of Chemical and Biological Engineering, University at Buffalo, the State University of New York, Buffalo, New York 14260, United States

Email: gangwu@buffalo.edu

Abstract: Sustainable synthesisofAmmonia (NH3) is gaining great attention not only for its application as an alternative renewable energy fuel but also to substitute production of ammonia through the conventional Haber Bosh process. The conventional Haber-Bosh uses fossil fuels in deriving hydrogen from steam reforming of natural gas, is energy intensive and also leads to significant CO2 emission. Alternatively, electrochemical synthesis of ammonia (ESA) using renewable energy through the nitrogen reduction reaction (NRR) in alkaline medium saves the use of hydrogen as a reactant as the aqueous electrolyte forms the source of proton. However, the standard reduction potential of nitrogen and hydrogen fall in the same domain. Thus, hydrogen evolution reaction is so dominant at the applied potential that selectivity of nitrogen reduction is a major challenge in the budding field. Herein, we report a metal-organic framework-derived nitrogen-doped metal free nanoporous carbon electrocatalyst with a Faradaic efficiency (FE) of 10 % at -0.3 V vs RHE under ambient conditions for the NRR. It exhibits a remarkable production rate of NH3 up to 3.4×10-6 mol cm-2 h-1 using aqueous 0.1 M KOH electrolyte. The performance has been compared with other N doped carbon derived from commercial polyaniline and nitrogen free KJ black and N doped CNT. The stability of the nitrogen-doped electrocatalyst was demonstrated during an 18-hour continuous test with constant production rates. This work provides a new insight into the rational design and synthesis of nitrogen-doped and defect-rich carbon NRR catalysts for NH3 synthesis at ambient conditions.