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RUI: Collaborative Research: An Engineering Design Approach for the Tandem Catalysis of Carbon Dioxide (CO2) using Nanoporous Bi-layer Structures

RUI：协作研究：利用纳米多孔双层结构串联二氧化碳（CO2）催化的工程设计方法

基本信息

批准号：
2207302
负责人：
Sunghwan Lee
金额：
$ 25.5万
依托单位：
Purdue University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2022
资助国家：
美国
起止时间：
2022-09-01 至 2025-08-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2207302&HistoricalAwards=false
关键词：
RUI Collaborative Research Engineering Design

项目摘要

As electricity derived from renewable sources becomes cheaper, its use for driving commercially relevant chemical processes has become increasingly viable, leading the path towards a sustainable energy economy. The combined research team at Purdue and University of Wisconsin Lacrosse are designing new catalysts for the conversion of carbon dioxide (CO2) to value-added products such as ethylene at industrially relevant conversion rates. The team will use their specific expertise to engineer novel layered catalyst structures, allowing the resulting materials to be more robust, efficient, and faster for CO2 conversion. This collaborative project involving both undergraduate and graduate researchers will also impact a broad range of technologies related to renewable energy, transportation, and defense. The project will promote knowledge-sharing activities such as regular joint meetings, undergraduate research mentored closely by graduate students, and inclusion of research activities into the curriculum. The project will also involve participation of underrepresented groups in working with research-intensive universities with a focus on skill-building activities such as group presentations, and scientific writing.This project aims to develop porous bi-layer catalysts on gas-diffusion layer (GDL) substrates which can then be used inside gas-fed carbon dioxide (CO2) electrolyzers allowing conversion to valuable C2+ products such as ethylene, at industrially relevant rates. The guiding principle of the project rests on using the bi-layer structure to break CO2 reduction scaling relations by creating asymmetric reaction sites, allowing greater selectivity through a cascade approach than from a single material. The use of a GDL substrate enables the possibility of high-rate conversions not possible with traditional reactors. The project will identify the underlying factors that determine structure-property relationships of the composite bilayer-GDL heterostructure with a focus on controlling the pore size, grain size, and associated grain boundary density. Specific metal/metal oxide heterostructures will be chosen based on recently available theoretical predictions in order to reduce the reaction overpotential, which often limits the energetic efficiency. In parallel, a carefully controlled pore size will be used to promote C-C coupling reactions through nano-confinement effects. This bilayer-GDL composite structure represents a unique combination of design elements, arising from two unique skill sets in catalyst fabrication and electrochemical testing. Coupled with a novel flow-reactor, the methodology promises to provide valuable insight into the challenging problem of high rate CO2 conversion to C2+ products such as ethylene.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.

随着可再生能源产生的电力变得越来越便宜，其用于驱动商业相关化学过程变得越来越可行，引领了通往可持续能源经济的道路。普渡大学和威斯康星大学长曲棍球分校的联合研究团队正在设计新的催化剂，以工业相关的转化率将二氧化碳 (CO2) 转化为乙烯等增值产品。该团队将利用他们的专业知识来设计新颖的层状催化剂结构，使所得材料更坚固、更高效、更快速地进行二氧化碳转化。这个涉及本科生和研究生研究人员的合作项目还将影响与可再生能源、交通和国防相关的广泛技术。该项目将促进知识共享活动，例如定期联席会议、研究生密切指导的本科生研究以及将研究活动纳入课程。该项目还将让代表性不足的群体参与与研究密集型大学的合作，重点是小组演示和科学写作等技能建设活动。该项目旨在开发气体扩散层 (GDL) 基底上的多孔双层催化剂，然后将其用于气体馈送二氧化碳 (CO2) 电解槽内，从而转化为有价值的 C2+ 产品，例如乙烯，工业相关率。该项目的指导原则在于使用双层结构通过创建不对称反应位点来打破二氧化碳还原缩放关系，通过级联方法比使用单一材料具有更大的选择性。 GDL 基底的使用使得传统反应器无法实现的高速率转化成为可能。该项目将确定决定复合双层-GDL异质结构的结构-性能关系的根本因素，重点是控制孔径、晶粒尺寸和相关的晶界密度。将根据最近可用的理论预测选择特定的金属/金属氧化物异质结构，以降低反应过电势，这通常会限制能量效率。同时，仔细控制的孔径将用于通过纳米限制效应促进 C-C 偶联反应。这种双层 GDL 复合结构代表了设计元素的独特组合，源自催化剂制造和电化学测试方面的两种独特技能。与新颖的流动反应器相结合，该方法有望为二氧化碳高速转化为乙烯等 C2+ 产品的挑战性问题提供有价值的见解。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。