Tunable catalytic surfaces synthesized and studied by in-situ methods

原位方法合成和研究的可调催化表面

• 批准号: 2015275
• 负责人: Alexander Orlov
• 金额: $ 32.28万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2015275&HistoricalAwards=false
• 关键词: Tunable; catalytic; surfaces; synthesized; studied

Research examining modification of oxide surfaces with nanostructure has produced exciting materials for optical, mechanical, chemical, and other applications. These nanostructured surfaces can accelerate the chemical reactions used to produce fuel, enabling cheaper, more efficient, and more environmentally-sound production. As such, this project stands to protect the Nation's security through access to more affordable fuel sources. The project will advance understanding of how aspects of the nanostructured surface formation can facilitate the transformation of atmospheric emissions into fuels. This project also seeks to integrate research and educational activities through a combination of traditional and pioneering approaches. For example, the investigator plans to introduce educational games and on-line learning tools into undergraduate and high school courses. The effectiveness of efforts to broaden the participation of underrepresented groups in STEM will be evaluated through the on-line learning outcomes. Graduate students in the investigator's "Materials Impact on the Environment" course will have the opportunity to conduct pilot testing of self-cleaning catalytic coatings, which will be deposited on on-campus solar panels. Traditional methods of controlling morphology and size distribution of nanoparticles have significant drawbacks. For instance, capping and encapsulating agents are usually difficult to remove, resulting in surface contamination, while physical deposition methods are challenging to scale up. This project offers a unique approach to forming nanostructured surfaces by establishing new structure-property relations, where particle size, metal-oxide interfaces, and shape are tuned by a relatively simple yet novel and scalable approach. Modulation of reduction temperature, concentration, type of dopants, and the presence of oxygen vacancies will enable control of particle size and morphology, which are critical for achieving unique catalytic properties. By combining new in-situ characterization techniques and theoretical methods based on machine learning tunable surfaces, capable of high conversion of carbon dioxide to fuels, will be developed.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.

研究检查与纳米结构的氧化物表面的改性产生了令人兴奋的材料，用于光学，机械，化学和其他应用。这些纳米结构表面可以加速用于生产燃料的化学反应，从而实现更便宜，更高效，更环保的生产。因此，该项目旨在通过获得更负担得起的燃料来源来保护国家安全。该项目将进一步了解纳米结构表面形成的各个方面如何促进将大气排放物转化为燃料。该项目还力求通过传统和开拓性方法相结合，将研究和教育活动结合起来。例如，研究人员计划在本科和高中课程中引入教育游戏和在线学习工具。将通过在线学习成果评估扩大代表性不足群体参与STEM的努力的有效性。研究生在研究员的“材料对环境的影响”课程将有机会进行自清洁催化涂层的试点测试，这将是沉积在校园太阳能电池板。 传统的控制纳米颗粒的形态和尺寸分布的方法具有显著的缺点。例如，封端剂和包封剂通常难以去除，导致表面污染，而物理沉积方法难以扩大规模。该项目提供了一种独特的方法，通过建立新的结构-性能关系来形成纳米结构表面，其中颗粒尺寸，金属氧化物界面和形状通过相对简单但新颖且可扩展的方法进行调整。调节还原温度、浓度、掺杂剂类型和氧空位的存在将能够控制颗粒尺寸和形态，这对于实现独特的催化性能至关重要。通过结合新的原位表征技术和基于机器学习的理论方法，将开发出能够将二氧化碳高转化为燃料的可调表面。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

Enhancing CO Oxidation Activity via Tuning a Charge Transfer Between Gold Nanoparticles and Supports

• DOI: 10.1021/acs.jpcc.1c10072
• 发表时间: 2022-03
• 期刊: The Journal of Physical Chemistry C
• 作者: Hao-Hsun Yang;J. Cen;Qiyuan Wu;C. Ridge;X. Tong;Chenyu Zhou;V. Veerasamy;D. Su;C. M. Lindsay;Mingzhao Liu;A. Orlov

Strong metal–support bonding enhanced thermal stability in Au–Al2O3 core–shell nanowires characterized by in situ transmission electron microscopy

原位透射电子显微镜表征的强金属-支撑键合增强了 Au-Al2O3 核-壳纳米线的热稳定性

• 发表时间: 2023
• 期刊: Chemical communications
• 影响因子: 4.9
• 作者: Haotian, Yang;Claron, Ridge;Kyle, Overdeep;Michael, Lindsay;Xiao, Tong;Alexander, Orlov
• 通讯作者: Alexander, Orlov