RUI: CAS: Novel Carbon Nanosphere Encapsulated Bimetallic Catalysts and Metal-CeO2 Interfaces for CO2 Conversion to Value-added Chemicals

RUI：CAS：新型碳纳米球封装双金属催化剂和金属-CeO2 界面，用于将二氧化碳转化为增值化学品

• 批准号: 2247399
• 负责人: Cheng Zhang
• 金额: $ 31.66万
• 依托单位: Long Island University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2247399&HistoricalAwards=false
• 关键词: RUI; CAS; Novel; Carbon; Nanosphere

With the support of the Chemical Catalysis program in the Division of Chemistry, Cheng Zhang of Long Island University (Post) is developing new catalysts for CO2 conversion to useful products. As a greenhouse gas, CO2 at elevated levels can give rise to significant environmental issues. There is an urgent need to mitigate CO2 emissions to alleviate the negative impact of elevated greenhouse gas levels on our planet. As such, efficient capture and utilization of CO2 to produce value-added chemicals is highly desirable. This research aims to convert CO2 by catalytic hydrogenation to valuable building blocks for polymers and plastics that are currently produced primarily from fossil carbon sources. A key significance of this project is to identify trends and dominant factors that can be utilized to design efficient catalysts for CO2 conversion. New discoveries from this work may enable the tunable control of catalyst properties for the systems under study, and facilitate the discovery of new catalysts for CO2 conversion. Dr. Zhang will incorporate undergraduate research and education as a significant component of this NSF-funded project. Dr. Zhang’s lab includes students of various ethnicity and majors. Involving undergraduates in research is a crucial element of their education, not only to hone their quantitative and critical thinking skills but also to build their practical appreciation and understanding of how scientific research is conducted. Through their work on this scientific project, students will experience important elements of taking responsibility, problem-solving, persistence, thoroughness, teamwork, commitment and patience, all useful traits for the research scientist. Under this project, the group of Cheng Zhang at Long Island University is working to understand the reaction mechanism and dominant factors affecting CO2 hydrogenation to light olefins as catalyzed by encapsulated transition metals and metal oxides within the confines of carbon nanospheres (CNS). The goal is to be able to use these parameters to tune catalyst functionality for efficient CO2 conversion. Specifically, the Zhang team will probe the effects of metal and/or metal carbide particle size, metal alloy formation, metal-metal oxide interaction and confinement effects on the catalyst activity, selectivity, and stability for CO2 conversion to value-added chemicals. Catalytic performance will be examined in light of structural characterization and in view of density functional theory (DFT) calculations to gain more insight. Particular goals of these investigations are (i) to take advantage of the confinement of the CNS to protect Fe-M nanoparticles from agglomeration and retain their reduced state, (ii) to exploit the abundant oxygen vacancies on CeO2, (iii) to take advantage of the hydrophobic and graphitic nature of CNS with defect sites, and (iv) to use the short diffusion length inside the CNS pores to minimize undesired olefin secondary reactions. The integration of synthesis, evaluation, advanced characterization, and DFT calculations is critical for the success of this science and highlights the multi-faceted nature of the study.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.

在化学催化计划的支持下，长岛大学（POST）的Cheng Zhang正在开发新的催化剂，以转化为有用的产品。作为温室气体，较高水平的二氧化碳会导致重大的环境问题。迫切需要减轻二氧化碳排放，以减轻温室气水平升高对地球的负面影响。因此，非常需要有效捕获和利用CO2产生增值化学物质。这项研究旨在通过催化氢化将CO2转换为目前主要由化石碳源生产的聚合物和塑料的有价值的构件。该项目的关键意义是确定可用于设计有效催化剂的趋势和主要因素，以用于CO2转化。这项工作中的新发现可以使正在研究的系统对催化剂特性的可调控制，并支持发现新的催化剂以用于CO2转换。张博士将将本科研究和教育纳入该NSF资助项目的重要组成部分。张博士的实验室包括各种种族和专业的学生。 Involving undergraduates in research is a crucial element of their education, not only to hone their quantitative and critical thinking skills but also to build their practical appreciation and Under this project, the group of Cheng Zhang at Long Island University is working to understand the reaction mechanism and dominant factors affecting CO2 hydrogenation to light olefins as catalyzed by encapsulated transition metals and metal oxides within the confines of carbon nanospheres (CNS).目标是能够使用这些参数来调整催化剂功能以进行有效的二氧化碳转换。具体而言，张团队将探测金属和/或金属碳化物粒径，金属合金形成，金属金属氧化物的相互作用以及对催化剂活性的影响，选择性和稳定性的稳定性，以及二氧化碳转化为增值化学物质的稳定性。鉴于结构表征和密度功能理论（DFT）计算，将检查催化性能，以获得更多的见解。这些投资的特殊目标是（i）利用CNS的限制来保护Fe-m纳米颗粒免受聚集的影响并保留其降低状态，（II）利用CEO2上的大量氧气空缺（III），以利用与CN的疏水性和图形性质的优势，并使用DIFIIM和（IIV）的疏水性和图形性质（IIV）。不想要的烯烃二次反应。综合，评估，高级表征和DFT计算的整合对于该科学的成功至关重要，并突出了该研究的多方面性质。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛影响的审查标准来评估的珍贵的支​​持。