Tailoring Metal Oxide Redox Properties for Sustainable Energy Conversion

讲座名称: Tailoring Metal Oxide Redox Properties for Sustainable Energy Conversion
讲座时间: 2017-05-25
讲座人: 李凡星
形式:
校区: 兴庆校区
实践学分:
讲座内容: 美国北卡罗来纳州立大学李凡星副教授将于2017年05月24日-26日来我校进行学术访问,并针对用于能量和天然气转化的化学链技术前沿及最新进展进行学术报告,届时欢迎各位师生参与交流。 报告题目:Tailoring Metal Oxide Redox Properties for Sustainable Energy Conversion 报告时间:2017年05月25日,15:30-17:00 报告地点:西安交通大学化工行政楼106 报告内容简介: Unlike conventional fuel conversion processes which oxidize carbonaceous molecules with gaseous oxidants, the chemical looping strategy seeks to intensify fossil fuel conversion processes using lattice oxygen of transition metal oxides. In a typical chemical looping scheme, carbonaceous molecules are oxidized by active lattice oxygen (O2-) in the transition metal oxide, which functions as an oxygen carrier, a.k.a. redox catalyst. In a subsequent step, the O2- deprived oxygen carrier is replenished by a gaseous oxidant. In addition to fossil fuel combustions, tailored redox catalysts can be applied for a variety of applications including selective oxidation, water-splitting, and CO2reduction. This presentation exemplifies the use of iron and manganese containing mixed oxides for methane partial oxidation, oxidative dehydrogenation (ODH) of ethane, water-splitting, and CO2reduction. A number of redox catalysts composed of iron and/or manganese oxides are synthesized and characterized. Rational strategies to improve the redox activity, product selectivity, and/or water-splitting and CO2 reduction conversions are investigated through the assistance of ab-initio calculation tools and mechanistic investigations. Compared to traditional heterogeneous catalysts, the redox catalysts in the current study show the potential to be more selective. They also possess excellent redox stability. Close to 100% water and CO2 reduction efficiencies are shown to be achievable through rational selection of mixed metal oxides.  
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