Innovative concepts, materials and structures for direct electrochemistry

直接电化学的创新概念、材料和结构

• 批准号: RGPIN-2014-05174
• 负责人: Mohamedi, Mohamed
• 金额: $ 2.19万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=632309
• 关键词: Innovative; concepts; materials; structures; direct

Our research program on direct electrochemistry consists of two innovative and inter-related thrusts that will be pursued at the same time with the objectives of discovering new electrode materials and structures: (Theme 1) Green-based materials or composites that enable or provide enhanced electrocatalytic performance. -The objective is to discover new catalysts and structures for the electrooxidation of ethanol, fuel that can be produced from biological sources, and so by using it in fuel cells, can lead to low greenhouse gas emission power sources. Several metal oxides are cheap, abundant and green. Owing to particular native properties and functions on their own, some nanostructured functional metal oxide (FMO) such as CeO2, SnO2, TiO2, MnO2 are emerging as a unique class of electrode materials in fuel cells. In such applications, FMO can act as a supporting matrix to improve catalyst dispersion and its stability against sintering and particles aggregation; or promotes certain electrocatalytic reactions when combined with other catalysts. We will optimize synthesis routes that allow tailor-designing, architecturing and manipulation of FMOs in a precise manner to enhance particular functional properties principally when they are combined with Pt catalyst. A second crucial issue concerns the proper way in which FMOs must be inserted within the whole catalyst layer in order to enhance or to fully benefit from its functional properties, i.e., FMO when arranged differently in the catalyst layer whether or not adds the same functionality to the electrochemical response of the catalyst. (Theme 2) Enzymatic electrode interfaces for biofuel cells (BFC).- Our recent striking achievements in nanoscale science and technology present a distinctive opportunity for us to create the first-ever blood vessel implantable enzymatic biofuel cell as in vivo power sources for bioelectronics. We will develop creative ultra-micro-nano scales architectured biocatalytic electrodes. Such architectures will be made of a single carbon fiber sheathed with carbon nanostructures (CNs) or transition metal oxides (TMOs) with high isoelectric point; this involves a challenging controlled growth of the CNs or TMOs onto a single carbon microfiber. The CNs or TMOs are expected to work as 'nano-wires' for fast direct electron transfer (DET) between enzyme and electrode surface, eliminating thus the need to employ conventional electronic mediators that are expensive and not biocompatible.The research program comprising of two themes related to materials and electrochemistry, creates an opportunity for a breakthrough, if not a discovery. It is ambitious and challenging, but we have the ability and resources to successfully undertake difficult projects and our recent striking achievements in the two themes with well-trained HQP will contribute to the development of important research areas such as green-based fuel cells and enzymatic glucose biofuel cells.

我们关于直接电化学的研究计划由两个创新和相互关联的推力组成，这些推力将同时与发现新电极材料和结构的目标同时进行：（主题1）启用或提供增强的电催化性能的绿色基材料或复合材料。 - 目的是发现乙醇电氧化的新催化剂和结构，可以从生物来源产生的燃料，因此通过在燃料电池中使用它可以导致低温温室气体排放功率来源。几种金属氧化物便宜，丰富且绿色。由于独立的特定本地特性和功能，因此某些纳米结构金属氧化物（FMO）（例如CEO2，SNO2，TIO2，MNO2）正在成为燃料电池中独特的电极材料。在这种应用中，FMO可以充当支持矩阵，以改善催化剂分散及其对烧结和颗粒聚集的稳定性；或与其他催化剂结合使用时促进某些电催化反应。我们将优化允许以精确方式量身定制，架构和操纵FMO的综合途径，以便在与PT催化剂结合使用时主要增强特定功能性能。第二个关键问题涉及必须在整个催化剂层中插入FMO的正确方法，以增强或完全受益于其功能特性，即，当在催化剂层中以不同的方式排列时FMO是否会在催化剂的电化学响应中添加相同的功能。 （主题2）生物燃料细胞的酶电极界面（BFC）。-我们最近在纳米级科学和技术中取得的惊人成就为我们提供了独特的机会，可以创建有史以来第一个植入血管的植入酶生物燃料细胞，作为生物电子学的体内功率来源。我们将开发创造性的超微米纳米尺度构建的生物催化电极。这样的体系结构将由带有碳纳米结构（CNS）或过渡金属氧化物（TMOS）的单个碳纤维制成；这涉及中枢神经系统或TMO在单个碳超细纤维上的挑战性控制。预计中枢神经系统或TMO在酶和电极表面之间的快速直接电子传输（DET）的“纳米线”有效，因此无需使用昂贵而不是生物相容性的传统电子媒介。与材料和电化学相关的两个主题，不可能进行材料和电化学相关的研究计划，从而创造出了一个机会，可以实现一项实验性的机会，即一项探究率（探索）。这是雄心勃勃且具有挑战性的，但是我们具有成功开展困难项目的能力和资源，而我们最近在训练有素的HQP的两个主题中取得的惊人成就将有助于开发重要的研究领域，例如绿色基于绿色的燃料电池和酶促葡萄糖生物燃料细胞。