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报告内容摘要：
In this presentation, we will summarize recent substantial progress in the development, performance testing, and characterization of non-precious metal oxygen reduction electrocatalysts obtained using both low- and high-temperature approaches. The main focus of this presentation will be on materials derived from heteroatomic organic compounds, including polypyrrole (high- and low- temperature approaches) as well as from polyaniline and cyanamide in the presence and absence of transition-metal salts as metal precursors. The catalysts have been studied using carbon and selected alternative supports, such as TiO2. The best non-precious metal ORR catalysts (at a high loading allowed by their low cost) trail Pt in the rotating disk electrode (RDE) experiments by no more than 30 mV, with similar performance difference maintained in the fuel cell at high voltages, i.e. in the range where PEFC performance is controlled by the oxygen reduction kinetics. Catalysts also show much improved durability under both steady-state and potential-cycling conditions. An extensive characterization using electrochemical and non-electrochemical techniques allows for the correlation of high ORR activity with several different factors, including the nature of nitrogen precursors used in the synthesis and catalyst microporosity. In turn, the presence of graphene sheets can be strongly correlated with the most durable catalysts.

报告人简介：
Dr. Piotr Zelenay received his Ph.D. and D.Sc. (“habilitation”) degrees in chemistry from Warsaw University, Warsaw, Poland. He was a postdoctoral research fellow at Texas A&M University, College Station (1983-1986), a Visiting Professor at the University of Illinois Urbana-Champaign (1988, 1989, 1990-92), University of Alicante, Spain (1994), and Colorado State University (1996-1997). Dr. Zelenay was appointed a faculty member in the Department of Chemistry, Warsaw University in 1983 and remained at the University until 1997, when he accepted a permanent position at Los Alamos National Laboratory (LANL). Dr. Zelenay has been associated with Materials Physics and Applications Division (formerly Materials Science & Technology Division) at Los Alamos National Laboratory for the last 14 years. He is currently a Project Leader and Team Leader at LANL focusing primarily on fundamental and applied aspects of polymer electrolyte fuel cell science and technology, electrocatalysis, electrode kinetics, and electrosynthesis.
Dr. Piotr Zelenay has published more than 100 research articles in renowned scientific journals, including Nature and Science. These publications have earned him to date nearly 4,000 citations. Dr. Zelenay has also co-authored more than 250 presentations, of which 80 have been the invited, keynote, and plenary lectures. He has to his credit 13 patents and patent applications in the area of polymer electrolyte fuel cells. Since becoming Project Leader for the Los Alamos Fuel Cell Program in 2000, Dr. Zelenay has led 18 various research projects, predominantly in the areas of direct methanol fuel cells and cathode electrocatalysis, which brought more $35M in research funding to the Program. In appreciation of his research accomplishments, Dr. Zelenay received nearly 20 awards and recognitions. In June 2010, he was awarded the DOE Hydrogen Program R&D Award in Recognition of Outstanding Contributions to Fuel Cell Technologies, in particular for his research of non-precious metal electrocatalysts for oxygen reduction reaction. Dr. Piotr Zelenay is a member of the Editorial Board of the journal Electrocatalysis and also a member of the Electrochemical Society and International Society of Electrochemistry.