UNS:Surface and Electrochemical Processes in Co-Electrolysis of Carbon Dioxide and Water

UNS：二氧化碳和水共电解的表面和电化学过程

• 批准号: 1509117
• 负责人: Eric Stuve
• 金额: $ 35.74万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-15 至 2021-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1509117&HistoricalAwards=false
• 关键词: UNS; Surface; Electrochemical; Processes; Co

The project targets co-electrolysis of carbon dioxide and water in high-temperature solid oxide electrolysis cells (SOECs) to make synthesis gas, which can be further reacted to produce fuels and chemicals. Although attractive from a sustainability standpoint, there are many technological hurdles to overcome before co-electrolysis can become commercially feasible. The study will investigate the surface reactions at the electrode to determine their mechanisms, kinetics, and sensitivity to different materials. The resulting scientific insight should lead to the design of improved co-electrolyzers. The PI will couple the work with educational opportunities for undergraduate and graduate students, as well as learning experiences and research exposure for high-school and community college students. Co-electrolysis of carbon dioxide and water to produce synthesis gas is a daunting technological challenge, but one with huge benefits to energy and overall sustainability if it can be achieved. One key to achieving success is to build fundamental understanding of the surface reaction processes involved, and use the resulting insight to design better catalysts. The project will focus on mixed conducting ceria and perovskite SOEC cathodes with the goal of constructing kinetic models of surface reactions. Specifically, the project will combine analysis of gas phase reaction products and electrochemical measurements to elucidate catalytic mechanisms and reaction pathways, including rate limiting steps. The resulting insight will be used to understand dependence of electrolysis reactions on properties of the cathode, with potential for extending the general approach to predict new cathode materials and designs. The fundamental understanding that will come from the proposed work will potentially impact a broad range of electrocatalytic applications with related benefits to energy and sustainability. On the education side, the PI (Stuve) teaches two energy related classes each year that are innovative in nature and highly suscribed. The project also supports a novel outreach program - the Energy eXperience Project (EXP) - which gives high school and community college students an opportunity to experience hands on energy-related work at the University of Washington through an annual symposium.

该项目的目标是在高温固体氧化物电解槽(SOECs)中共同电解二氧化碳和水，以制造合成气，合成气可以进一步反应生成燃料和化学品。虽然从可持续发展的角度来看很有吸引力，但在共电解变得商业可行之前，还有许多技术障碍需要克服。这项研究将研究电极上的表面反应，以确定它们的机理、动力学和对不同材料的敏感性。由此产生的科学见解应该会导致改进的共电解槽的设计。PI将把这项工作与本科生和研究生的教育机会以及高中和社区大学学生的学习经历和研究接触结合在一起。二氧化碳和水的共电解生产合成气是一项艰巨的技术挑战，但如果能够实现，将对能源和整体可持续性产生巨大的好处。取得成功的一个关键是建立对所涉及的表面反应过程的基本了解，并利用由此获得的见解来设计更好的催化剂。该项目将专注于混合导电CeO2和钙钛矿型SOEC阴极，目标是建立表面反应的动力学模型。具体地说，该项目将结合对气相反应产物的分析和电化学测量来阐明催化机理和反应途径，包括限速步骤。由此得到的洞察力将被用来理解电解反应对阴极性能的依赖，有可能扩展预测新的阴极材料和设计的一般方法。拟议工作将产生的基本理解可能会影响广泛的电催化应用，与能源和可持续发展相关。在教育方面，PI(Stuve)每年教授两个与能源相关的课程，这些课程在本质上是创新的，受到高度怀疑。该项目还支持一个新的外展项目--能源体验项目(EXP)--该项目让高中生和社区大学的学生有机会通过年度研讨会体验华盛顿大学与能源相关的工作。