GOALI: Emission, transport and trapping of platinum group derived mobile species in automotive exhaust catalysts

目标：汽车尾气催化剂中铂族衍生移动物质的排放、传输和捕集

• 批准号: 1707127
• 负责人: Abhaya Datye
• 金额: $ 33.75万
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-01 至 2021-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1707127&HistoricalAwards=false
• 关键词: GOALI; Emission; transport; trapping; platinum

Next-generation fuel-efficient combustion engines require improved catalytic converters in the exhaust system. The proposed research addresses the design of these catalysts by employing novel porous structures. The overarching goal is to reduce exhaust emissions while minimizing impact on fuel economy and reducing the need for precious metals such as Pt and Pd. The proposed research is an industry-university collaboration between GM Global R&D and the University of New Mexico. The project will provide opportunities for students and early career researchers to learn about the challenges in implementing new technologies for exhaust emissions control.The research challenge being addressed here impacts the entire class of heterogeneous catalysts used for meeting the needs for energy, materials and fuels. Automotive exhaust catalysts are subjected to elevated temperatures that lead to growth of nanoparticle size through Ostwald ripening and to loss of activity. The research will look into the role of pore structure and chemistry in the transport of mobile species during Ostwald ripening and in the trapping of the mobile species to limit the growth of particles. Model porous catalysts will be synthesized with systematic control of the size of the pores and the connectivity of the pore network. The transport rates of the mobile species will be studied. Modifying the surface chemistry can influence the diffusive transport and can also effectively trap the mobile species once they get emitted from nanoparticles. The overall outcome from these model studies is a decrease in particle growth rates due to decreased transport rates in pores. Insights from these model porous catalysts will be translated to powder catalysts and tested under realistic conditions using the facilities of the industry partner. The close participation of industry and university researchers is critical for validating the concepts and models. GM has committed significant resources in terms of people time and access to facilities, to enable this research to be successful. The partnership will help address significant unknowns in the understanding of catalyst sintering, and will lead to advances in the synthesis of novel catalysts with improved reactivity and more efficient use of precious metals.The project is co-funded by the Grant Opportunities for Academic Liaison with Industry (GOALI).

下一代燃油燃烧发动机需要在排气系统中改善催化转化器。拟议的研究通过采用新颖的多孔结构来解决这些催化剂的设计。 总体目标是减少排气排放，同时最大程度地减少对燃油经济性的影响，并减少对PT和PD等贵金属的需求。 拟议的研究是通用汽车全球研发与新墨西哥大学之间的行业大学合作。 该项目将为学生和早期职业研究人员提供机会，以了解实施用于排气排放控制的新技术所面临的挑战。在这里解决的研究挑战会影响整个类别的异质催化剂，用于满足能源，材料和燃料的需求。 汽车排气催化剂的温度升高，导致纳米颗粒大小通过Ostwald成熟和活性损失。 这项研究将研究孔结构和化学在奥斯特瓦尔德成熟过程中移动物种运输中的作用以及在移动物种捕获中以限制颗粒的生长。模型多孔催化剂将通过对孔径大小的系统控制和孔网络的连通性进行合成。 将研究移动物种的运输速率。 修改表面化学可能会影响扩散的传输，并且一旦从纳米颗粒中排放出移动物种，也可以有效地捕获移动物种。这些模型研究的总体结果是由于孔的运输速率降低而导致颗粒生长速率降低。这些模型多孔催化剂的见解将转化为粉末催化剂，并使用行业合作伙伴的设施在现实条件下进行测试。行业和大学研究人员的亲密参与对于验证概念和模型至关重要。 通用汽车在人们的时间和获取设施方面投入了大量资源，以使这项研究成功。 该合作伙伴关系将有助于解决对催化剂烧结的重要未知数，并将导致在综合新型催化剂的进步，并提高反应性和更有效地利用贵重金属。该项目由学术联络人与行业的学术联络机会共同资助。

项目成果

Restricting the growth of Pt nanoparticles through confinement in ordered nanoporous structures

通过限制有序纳米多孔结构来限制 Pt 纳米颗粒的生长

• DOI: 10.1016/j.apcata.2020.117858
• 发表时间: 2020
• 期刊: Applied Catalysis A: General
• 作者: Ghosh, Arnab;Pham, Hien;Higgins, Jack;Van Swol, Frank;DeLaRiva, Andrew;Melton, Matthew;Kunwar, Deepak;Qi, Gongshin;Oh, Se H.;Wiebenga, Michelle
• 通讯作者: Wiebenga, Michelle

Investigating anomalous growth of platinum particles during accelerated aging of diesel oxidation catalysts

• DOI: 10.1016/j.apcatb.2020.118598
• 发表时间: 2020-06
• 期刊: Applied Catalysis B-environmental
• 影响因子: 22.1
• 作者: Deepak Kunwar;Cristhian Carrillo;Haifeng Xiong;E. Peterson;A. DeLaRiva;Arnab Ghosh;Gongshin Qi;Ming-Mei Yang;Michelle H. Wiebenga;S. Oh;Wei Li;A. Datye

Using a Combination of HAADF and SE Imaging to Locate Pt Nanoparticles within a Mesoporous Silica Diesel Oxidation Catalyst

结合使用 HAADF 和 SE 成像来定位介孔二氧化硅柴油氧化催化剂中的 Pt 纳米颗粒

• DOI: 10.1017/s143192761800898x
• 发表时间: 2018
• 期刊: Microscopy and Microanalysis
• 影响因子: 2.8
• 作者: Pham, Hien N.;Howe, Jane Y.;Ghosh, Arnab;Melton, Matthew;Kunwar, Deepak;Peterson, Eric J.;Datye, Abhaya K.
• 通讯作者: Datye, Abhaya K.

Design considerations for low-temperature hydrocarbon oxidation reactions on Pd based catalysts

• DOI: 10.1016/j.apcatb.2018.05.049
• 发表时间: 2018-11-15
• 期刊: APPLIED CATALYSIS B-ENVIRONMENTAL
• 影响因子: 22.1
• 作者: Xiong, Haifeng;Wiebenga, Michelle H.;Datye, Abhaya K.
• 通讯作者: Datye, Abhaya K.