BRIGE: One-Dimensional PdFe Core- Pt Shell Nanowires for Oxygen Reduction Reaction

BRIGE：用于氧还原反应的一维 PdFe 核-铂壳纳米线

• 批准号: 1032547
• 负责人: Wenzhen Li
• 金额: $ 17.5万
• 依托单位: Michigan Technological University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1032547&HistoricalAwards=false
• 关键词: BRIGE; Dimensional; PdFe; Core; Pt

1032547Li The research objective of the NSF-BRIGE proposal is to investigate a novel one-dimensional axial PdFe core - Pt shell nanowires, which have advantageous crystallographic facets and tuned electronic properties, and can be used as efficient cathode catalysts for electrochemical energy conversion and storage devices. The overall goals are to acquire fundamental understanding of controlled wet-chemical synthesis of metallic nanocatalysts at the atomic and nano- scale, and gain knowledge of structure-catalytic functionality relationship of multi-metallic electrocatalytic systems. The career goal of the PI is to establish a world-class Nano Electrochemical Energy Program at Michigan Technological University (Michigan Tech) incorporating catalysis and clean energy with engineering, and integrating teaching / training / learning with research. Intellectual merits: Sustainably meeting humanity's energy needs has been identified as a primary research challenge for the next fifty years. Without Carnot limitation, electrochemical energy devices directly convert chemical energy of fuels (i.e. H2, ethanol, Zinc, etc) into electricity with high theoretical efficiency. However, the sluggish kinetics of oxygen reduction reaction (ORR) at cathode has been a long-standing scientific issue, which significantly reduces the electrochemical energy conversion efficiency. The PI's group has started a rigorous research on "accurate preparation of metallic nanostructures", and they have developed a wet-chemical approach to synthesis of 1-D PtFe/PdFe alloy nanowires with large electrochemical surface area and good durability. The working hypothesis is that PdFe core- Pt shell nanowires can 1) greatly improve ORR activity due to more active crystallographic facet Pt {111} on surface and optimized d-band center of surface Pt atoms; 2) significantly enhance durability due to less thermal-driven coalescence. To test this hypothesis, the PI proposes to conduct transformative research in the area of nanostructured catalysts for electrochemical energy. The specific research tasks of this proposal include: 1) precise synthesis and full characterization of carbon supported 1-D PdFe core- Pt shell nanowires (PdFe@Pt-NW/C) catalysts, 2) investigate electrochemical performance of PdFe@Pt-NW/C in three-compartment-cell, and 3) ORR and durability study in real electrochemical energy device. This NSF-BRIGE proposal fits well into the PI's long-term research interest of studying controlled synthesis of novel nanoengineered materials and understanding their electrocatalytic reaction mechanisms. Broader Impacts: The project activities will have a broad impact on research, education and outreach efforts in the Great Lakes Region through Michigan Tech's established infrastructure. The knowledge and technology generated from the research activities will advance accurate synthesis of novel catalysts at the atomic and nano- scale, and deepen understanding of structure-catalytic functionality relationship (specifically, "Pt skin-PdFe substrate interaction" with ORR activity) of multimetallic catalysts. This research effort will initiate close research collaborations with industry. It will propel development of advanced materials, deliver new discoveries, enhance Michigan Tech's infrastructure and technology-transfer, and strengthen Michigan Tech's on-going "sustainable energy" activities. This research will also help upgrade fabrication techniques of clean electrochemical energy devices. In particular, it will support the nation?s efforts to diversify its energy supply and reduce dependence on foreign oil. The proposed educational plan is to design and produce a Clean Energy Workbook. The Workbook will serve as a unique material in clean energy and catalysis education for undergraduate and secondary students. One primary audience will include diverse groups of 6th-12th grade students who participate in Michigan Tech's existing summer youth program (SYP) and diverse community college students in the existing Michigan College & University Program (MICUP), in which the majority of students are primarily drawn from traditionally underrepresented groups in science and engineering. The proposed research and education plan will help to bring more engineers from groups traditionally underrepresented (female, African American, Hispanic and Native American, disabled) into engineering areas by working on cutting-edge Nanocatalyst Technology. Exposing young students to the catalysis, clean energy, and nanotechnology research environment will inspire their curiosity and interest in science, engineering, and technology, and benefit society by sustainably supplying a number of diverse, next generation researchers that serve as role models for the scientific workforce of the future.

1032547LI NSF-BRIGE提案的研究目标是研究具有有利的晶体学方面和调谐电子性能的新型一维轴向PDFE核心-PT壳纳米线，并可以用作有效的电气磁极催化剂，用于电化学能量转换和存储设备。总体目标是获得对原子和纳米尺度金属纳米催化剂的受控湿化学合成的基本理解，并获得对多金属电催化系统的结构催化功能关系的了解。 PI的职业目标是在密歇根技术大学（密歇根理工学院）建立世界一流的纳米电化学能源计划，该计划将催化和清洁能源与工程融合在一起，并将教学 /培训 /学习与研究结合。 智力优点：可持续满足人类的能源需求已被确定为未来五十年的主要研究挑战。如果不限制Carnot，电化学能设备直接将燃料的化学能（即H2，乙醇，锌等）转化为具有高理论效率的电力。然而，阴极的氧气还原反应（ORR）的动力学一直是一个长期的科学问题，它大大降低了电化学能量转化效率。 PI的小组已经开始对“金属纳米结构的准确制备”进行了严格的研究，并开发了一种湿化学方法来合成具有较大电化学表面积和良好耐用性和良好耐用性的1-D PTFE/PDFE合金纳米线。工作假设是PDFE核心 - PT壳纳米线可以1）由于表面和优化的表面PT原子中心和优化的D波段中心在表面和优化的D波段中心上更活跃的晶体学方面{111}，因此可以极大地改善ORR活性； 2）显着提高了由于热驱动的合并较少而引起的耐用性。为了检验这一假设，PI提议在纳米结构催化剂区域进行电化学能源的变革性研究。 The specific research tasks of this proposal include: 1) precise synthesis and full characterization of carbon supported 1-D PdFe core- Pt shell nanowires (PdFe@Pt-NW/C) catalysts, 2) investigate electrochemical performance of PdFe@Pt-NW/C in three-compartment-cell, and 3) ORR and durability study in real electrochemical energy device.该NSF-Brige提案非常适合PI研究的长期研究兴趣，即研究对新型纳米工程材料的控制合成并了解其电催化反应机制。 更广泛的影响：通过密歇根理工学院建立的基础设施，项目活动将对大湖地区的研究，教育和外展工作产生广泛的影响。研究活动产生的知识和技术将在原子和纳米尺度上准确合成新型催化剂，并加深对多金属催化剂的结构催化功能关系（特别是“与ORR活性）的“ PT Skin-PDFE底物相互作用”）。这项研究工作将开始与行业的密切研究合作。它将推动高级材料的开发，提供新的发现，增强密歇根理工学院的基础设施和技术转移，并加强密歇根理工学院的持续“可持续能源”活动。这项研究还将有助于升级清洁电化学能源设备的制造技术。特别是，它将支持该国努力多样化其能源供应并减少对外国石油的依赖。拟议的教育计划是设计和制作清洁能源工作簿。该工作簿将作为本科和中学生清洁能源和催化教育的独特材料。一名主要受众将包括参加密歇根理工学院现有的夏季青年计划（SYP）的6至12年级学生的不同小组，以及现有的密歇根大学和大学课程（MICUP）的多元化社区学院学生，其中大多数学生主要来自传统上代表性不足的科学和工程领域的人。拟议的研究和教育计划将有助于将更多的工程师带入传统上代表性不足（女性，非裔美国人，西班牙裔和美洲原住民，残疾人）的团体中，通过致力于尖端的纳米催化剂技术，将其带入工程领域。使年轻学生接受催化，清洁能源和纳米技术研究环境将激发他们对科学，工程和技术的好奇心和兴趣，并通过可持续地提供许多多样​​化的下一代研究人员来使社会受益，这些研究人员是对未来科学劳动力的榜样。