Investigations of Binary Transition Metal Oxide Electrocatalysts for the Oxygen Evolution Reaction

二元过渡金属氧化物电催化剂用于析氧反应的研究

• 批准号: 1800376
• 负责人: Bruce Koel
• 金额: $ 45.97万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-08-01 至 2021-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1800376&HistoricalAwards=false
• 关键词: Investigations; Binary; Transition; Metal; Oxide

Some energy conversion and storage technologies use chemical reactions driven by electricity in a process known as electrocatalysis. Examples of these technologies include new metal-air batteries, water splitting for hydrogen evolution, and production of chemicals from the carbon dioxide (the byproduct of burning fossil fuels). All of these technologies share a crucial chemical reaction known as the oxygen evolution reaction (OER). The efficiencies of these technologies are often limited by the sluggish rate of the OER. In this project, Dr. Bruce E. Koel of Princeton University is conducting experiments on iridium (Ir) and cobalt (Co) based mixed oxide materials to develop a greater fundamental understanding of the OER. This project may lead to the discovery of novel electrocatalytic materials to enhance OER. Dr. Koel's research prepares students for careers in high-tech and emerging industries that value the ability to solve complex problems and that utilize sophisticated instrumentation. Undergraduate, graduate, and postdoctoral students are involved in the research and work together to conduct experiments, construct theoretical models, provide physical insight, and develop new explanations. The importance of this research for addressing the energy needs of the planet enhances student awareness of the impact of their work on society. This research prepares students for careers in academia, national laboratories, and industry.With support from the Chemical Catalysis Program of the Division of Chemistry and Catalysis and Biocatalysis Program in the Division of Chemical, Bioengineering, Environment and Transport Systems, Dr. Koel is conducting experiments on Ir and Co based mixed oxide electrocatalysts that are providing a greater fundamental understanding of OER electrocatalysis. Establishing clear relationships between atomic level surface properties and performance of active electrodes provides a better understanding of electrocatalysts for OER and provides rational strategies for improving OER kinetics. Active structures/motifs are identified during OER by operando Raman spectroscopy and key aspects of the water oxidation mechanism are revealed by identification of surface species during OER by operando Fourier transform infrared spectroscopy along with fundamental surface science experiments. Iridium based oxide catalysts are studied with the prospect of forming superior OER catalysts. The researcher also seek to reduce the loading of the expensive Ir metal and provide new materials for the development of cost-effective, high performance, stable OER catalysts. Cobalt based oxide catalysts are investigated because of their OER performance under alkaline conditions. They have potential for increasing catalyst activity and possibly lowering the pH range of operation.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

一些能量转换和存储技术使用由电驱动的化学反应，其过程称为电催化。这些技术的例子包括新的金属-空气电池，分解水以产生氢，以及从二氧化碳（燃烧化石燃料的副产品）中生产化学品。所有这些技术都有一个关键的化学反应，称为析氧反应（OER）。 这些技术的效率通常受到OER缓慢速率的限制。在这个项目中，布鲁斯E.普林斯顿大学的Koel正在对铱（Ir）和钴（Co）基混合氧化物材料进行实验，以加深对OER的基本理解。 该项目可能会导致发现新的电催化材料，以提高OER。Koel博士的研究为学生在高科技和新兴行业的职业生涯做好了准备，这些行业重视解决复杂问题的能力，并利用复杂的仪器。本科生，研究生和博士后学生参与研究，共同进行实验，构建理论模型，提供物理见解，并开发新的解释。这项研究对解决地球能源需求的重要性，提高了学生对他们的工作对社会的影响的认识。该研究为学生在学术界，国家实验室和工业界的职业生涯做好准备。在化学，生物工程，环境和运输系统部门的化学和催化以及生物催化计划部门的化学催化计划的支持下，Koel博士正在进行Ir和Co基混合氧化物电催化剂的实验，这些实验提供了对OER电催化的更基本的理解。建立明确的原子水平的表面性质和活性电极的性能之间的关系，提供了更好地理解OER的电催化剂，并提供了合理的策略，以改善OER动力学。活性结构/图案OER期间确定由操作拉曼光谱和水的氧化机制的关键方面，揭示了由操作傅里叶变换红外光谱沿着与基本的表面科学实验OER期间的表面物种的识别。研究了铱基氧化物催化剂，展望了形成上级OER催化剂的前景。 研究人员还寻求减少昂贵的Ir金属的负载量，并为开发具有成本效益的，高性能的，稳定的OER催化剂提供新材料。钴基氧化物催化剂由于其在碱性条件下的OER性能而被研究。 该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Controlled Dy-doping to nickel-rich cathode materials in high temperature aerosol synthesis

• DOI: 10.1016/j.proci.2020.06.332
• 发表时间: 2020-09
• 期刊: Journal of Thermal Analysis and Calorimetry
• 影响因子: 4.4
• 作者: Chao Yan;Xiaofang Yang;Hao Zhao;Hongtao Zhong;Guoming Ma;Yongfeng Qi;B. Koel;Y. Ju