A Novel Fuel Cell Catalyst and Support Architecture Based on Edge-site Pyridinic Nitrogen-Doping on Vertically Aligned Conical Carbon Nanofibers
基于垂直排列锥形碳纳米纤维边缘位吡啶氮掺杂的新型燃料电池催化剂和支撑结构
基本信息
- 批准号:1703263
- 负责人:
- 金额:$ 43.03万
- 依托单位:
- 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:2017-08-01 至 2022-07-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The project will explore the effectiveness and working mechanism of a new electrocatalyst design for low-temperature fuel cells. A pyridinic, nitrogen-doped vertically aligned carbon nanofiber (VACNF) structure is used both as the oxygen reduction reaction (ORR) electrocatalyst and as the support for the noble metal catalyst component. The hybrid design will potentially increase the effectiveness of the noble metal catalyst, thereby opening the door to ultra-low platinum-based fuel cell catalysts and improving the economic viability of fuel cells for a broad range of energy applications. The project is motivated by a recent study, by another group, of the ORR on a model system consisting of well-defined graphitic edges at microgrooves ion-etched in graphite crystals, which suggested that the active ORR sites are carbon atoms next to the pyridinic N formed at these edges. The present project will advance the current knowledge by focusing on creating a 3-D nanostructured carbon architecture version of the 2-D model system in the form of well-defined nitrogen-doped VACNF arrays that can be implemented in full fuel cells. Specific technical objectives of the project include (1) understanding and controlling the edge-site pyridinic nitrogen on the sidewall of conically stacked VACNFs as a metal-free catalyst for ORR, the key rate-limiting step in fuel cells; (2) exploring the pyridinic edge-doped VACNFs as highly stable hierarchical catalyst supports for ultra-low Pt loading in both cathodic and anodic reactions; and (3) interfacing the nitrogen-doped VACNF catalyst/support architecture with Nafion ionomer to form a novel membrane electrode assembly (MEA) for integrated fuel cell studies. The unique conically stacked graphitic structure of VACNFs is employed to generate precisely controlled edge-site pyridinic N-doping at the VACNF sidewall, while maintaining the ideal pi-bond conjugation of the internal graphitic layers. In such VACNF arrays, the open space between the vertically aligned nanofibers allows uniform Pt deposition and effective Nafion ionomer infiltration to form novel interpenetrating bicontinuous MEAs. This will improve mass transport and suppress the flooding issues common in fuel cells. To assist experimental design and optimization, first-principles modeling will be performed to establish the guideline for the physical and chemical behaviors of N-doped VACNF based on the geometric location and configuration of the N dopants, and the interactions with noble metals. These results will provide critical scientific understanding that will facilitate the development of sustainable catalysts for fuel cell technologies. In addition to the technical objectives, the project will include a number of educational and outreach components directed primarily at graduate, undergraduate, and K-12 students. The outreach programs will emphasize participation by middle- and high-school girls and will also feature collaboration with Xavier University of Louisiana, a historically black university.
该项目将探索用于低温燃料电池的新型电催化剂设计的有效性和工作机理。 吡啶类氮掺杂的垂直排列碳纳米管(VACNF)结构既用作氧还原反应(ORR)电催化剂又用作贵金属催化剂组分的载体。 混合设计将潜在地提高贵金属催化剂的有效性,从而为超低铂基燃料电池催化剂打开大门,并提高燃料电池在广泛能源应用中的经济可行性。 该项目的动机是最近的一项研究,由另一个小组,在一个模型系统上的ORR,该模型系统由在石墨晶体中离子蚀刻的微槽处的定义明确的石墨边缘组成,这表明活性ORR位点是在这些边缘处形成的吡啶N旁边的碳原子。 本项目将通过专注于以定义明确的氮掺杂VACNF阵列的形式创建2-D模型系统的3-D纳米结构碳架构版本来推进当前的知识,该阵列可以在全燃料电池中实施。 该项目的具体技术目标包括:(1)理解和控制锥形堆叠VACNF侧壁上的边缘位吡啶氮作为用于ORR的无金属催化剂,ORR是燃料电池中的关键限速步骤;(2)探索吡啶边缘掺杂的VACNF作为用于阴极和阳极反应中超低Pt负载的高度稳定的分级催化剂载体;(3)研究VACNF的结构和性能。以及(3)将氮掺杂的VACNF催化剂/载体结构与Nafion离聚物接合以形成用于集成燃料电池研究的新型膜电极组件(MEA)。VACNF独特的锥形堆叠石墨结构用于在VACNF侧壁处产生精确控制的边缘位置吡啶N掺杂,同时保持内部石墨层的理想π键共轭。 在这种VACNF阵列中,垂直排列的纳米纤维之间的开放空间允许均匀的Pt沉积和有效的Nafion离聚物渗透,以形成新的互穿双连续MEA。这将改善质量传输并抑制燃料电池中常见的溢流问题。为了帮助实验设计和优化,第一性原理模型将被执行,以建立基于N掺杂剂的几何位置和配置,以及与贵金属的相互作用的N掺杂VACNF的物理和化学行为的指导方针。 这些结果将提供关键的科学认识,促进燃料电池技术可持续催化剂的开发。 除了技术目标外,该项目还将包括一些主要针对研究生,本科生和K-12学生的教育和推广组件。 这些外展计划将强调初中和高中女生的参与,并将与路易斯安那州的泽维尔大学合作,这是一所历史悠久的黑人大学。
项目成果
期刊论文数量(13)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Electrochemical Activity Assay for Protease Analysis Using Carbon Nanofiber Nanoelectrode Arrays
- DOI:10.1021/acs.analchem.8b05189
- 发表时间:2019-03-19
- 期刊:
- 影响因子:7.4
- 作者:Song, Yang;Fan, Huafang;Li, Jun
- 通讯作者:Li, Jun
Platinum Deposited Nitrogen-Doped Vertically Aligned Carbon Nanofibers as Methanol Tolerant Catalyst for Oxygen Reduction Reaction with Improved Durability
- DOI:10.3390/applnano2040022
- 发表时间:2021-10
- 期刊:
- 影响因子:0
- 作者:Ayyappan Elangovan;Jiayi Xu;Archana Sekar;Sabari Rajendran;Bin-Hong Liu;Jun Li
- 通讯作者:Ayyappan Elangovan;Jiayi Xu;Archana Sekar;Sabari Rajendran;Bin-Hong Liu;Jun Li
Fundamental Electrochemical Insights of Vertically Aligned Carbon Nanofiber Architecture as a Catalyst Support for ORR
- DOI:10.1149/1945-7111/ab86c1
- 发表时间:2020-04
- 期刊:
- 影响因子:3.9
- 作者:Ayyappan Elangovan;Jiayi Xu;Emery Brown;B. Liu;Jun Li
- 通讯作者:Ayyappan Elangovan;Jiayi Xu;Emery Brown;B. Liu;Jun Li
3D printing of hybrid MoS2-graphene aerogels as highly porous electrode materials for sodium ion battery anodes
- DOI:10.1016/j.matdes.2019.107689
- 发表时间:2019-05-15
- 期刊:
- 影响因子:8.4
- 作者:Brown, Emery;Yan, Pengli;Li, Jun
- 通讯作者:Li, Jun
Theoretical Investigation of the Oxygen Reduction Reaction over Platinum Catalysts Supported by Multi‐Edged Vertically Aligned Carbon Nanofiber for Electrocatalyst Preparation
多棱垂直排列碳纳米纤维支持的铂催化剂氧还原反应电催化剂制备的理论研究
- DOI:10.1002/celc.202200811
- 发表时间:2022
- 期刊:
- 影响因子:4
- 作者:Xu, Jiayi;Elangovan, Ayyappan;Liu, Cong;Li, Jun;Liu, Bin
- 通讯作者:Liu, Bin
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Jun Li其他文献
Quantum Pure State Tomography via Variational Hybrid Quantum-Classical Method
通过变分混合量子经典方法进行量子纯态断层扫描
- DOI:
10.1103/physrevapplied.13.024013 - 发表时间:
2020-01 - 期刊:
- 影响因子:4.6
- 作者:
Tao Xin;Xinfang Nie;Xiangyu Kong;Jingwei Wen;Dawei Lu;Jun Li - 通讯作者:
Jun Li
Electrochemical, in-situ surface EXAFS and CTR studies of Co monolayers irreversibly adsorbed onto Pt(111)
Co 单层不可逆吸附在 Pt(111) 上的电化学、原位表面 EXAFS 和 CTR 研究
- DOI:
10.1016/s0013-4686(98)00362-4 - 发表时间:
1999 - 期刊:
- 影响因子:0
- 作者:
E. Herrero;Jun Li;H. Abruña - 通讯作者:
H. Abruña
Attribute-based Blockchain Dynamic Failure Traceability in Multi-vendor Disaggregated Optical Networks
多供应商分解光网络中基于属性的区块链动态故障追踪
- DOI:
10.1109/iwcmc58020.2023.10182621 - 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
W. Liu;Hui Yang;Chao Li;Jun Li;Q. Yao;J. Zhang - 通讯作者:
J. Zhang
Target-free 3D tiny structural vibration measurement based on deep learning and motion magnification
基于深度学习和运动放大的无目标3D微小结构振动测量
- DOI:
10.1016/j.jsv.2022.117244 - 发表时间:
2022 - 期刊:
- 影响因子:4.7
- 作者:
Yanda Shao;Lingjun Li;Jun Li;S. An;Hong Hao - 通讯作者:
Hong Hao
Multiscale and Multiphysics Flow Simulations of Using the Boltzmann Equation
使用玻尔兹曼方程的多尺度和多物理场流动模拟
- DOI:
- 发表时间:
2020 - 期刊:
- 影响因子:0
- 作者:
Jun Li - 通讯作者:
Jun Li
Jun Li的其他文献
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{{ truncateString('Jun Li', 18)}}的其他基金
Integrated Multiscale Computational and Experimental Investigations on Fracture of Additively Manufactured Polymer Composites
增材制造聚合物复合材料断裂的综合多尺度计算和实验研究
- 批准号:
2309845 - 财政年份:2023
- 资助金额:
$ 43.03万 - 项目类别:
Standard Grant
Discovery Projects - Grant ID: DP210101100
发现项目 - 拨款 ID:DP210101100
- 批准号:
ARC : DP210101100 - 财政年份:2021
- 资助金额:
$ 43.03万 - 项目类别:
Discovery Projects
Explore Electrocatalysis to Improve the Cathode Performance in Li-S Batteries
探索电催化提高锂硫电池正极性能
- 批准号:
2054754 - 财政年份:2021
- 资助金额:
$ 43.03万 - 项目类别:
Standard Grant
CIF: Small: Coding Techniques for Distributed Machine Learning
CIF:小型:分布式机器学习的编码技术
- 批准号:
2101388 - 财政年份:2020
- 资助金额:
$ 43.03万 - 项目类别:
Standard Grant
Offline and Online Change-point Analysis for Large-scale Time Series Data
大规模时间序列数据的离线和在线变点分析
- 批准号:
1916239 - 财政年份:2019
- 资助金额:
$ 43.03万 - 项目类别:
Continuing Grant
CIF: Small: Coding Techniques for Distributed Machine Learning
CIF:小型:分布式机器学习的编码技术
- 批准号:
1910447 - 财政年份:2019
- 资助金额:
$ 43.03万 - 项目类别:
Standard Grant
SUSCHEM: Exploring Specific Heating in Microwave-assisted Synthesis of Hierarchical Hybrid Nanomaterials for Future Sustainable Batteries
SUSCHEM:探索微波辅助合成未来可持续电池的分层混合纳米材料中的比热
- 批准号:
1707585 - 财政年份:2017
- 资助金额:
$ 43.03万 - 项目类别:
Standard Grant
CAREER: Genetic and Molecular Mechanisms of Parasite Infection in Insects
职业:昆虫寄生虫感染的遗传和分子机制
- 批准号:
1742644 - 财政年份:2017
- 资助金额:
$ 43.03万 - 项目类别:
Continuing Grant
TWC: Medium: Collaborative: Online Social Network Fraud and Attack Research and Identification
TWC:媒介:协作:在线社交网络欺诈和攻击研究与识别
- 批准号:
1564348 - 财政年份:2016
- 资助金额:
$ 43.03万 - 项目类别:
Standard Grant
CAREER: Genetic and Molecular Mechanisms of Parasite Infection in Insects
职业:昆虫寄生虫感染的遗传和分子机制
- 批准号:
1453287 - 财政年份:2015
- 资助金额:
$ 43.03万 - 项目类别:
Continuing Grant
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