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.

我们的直接电化学研究计划由两个相互关联的创新性研究项目组成，这两个研究项目将同时进行，其目标是发现新的电极材料和结构：（主题 1）能够实现或提供增强电催化的绿色材料或复合材料表现。 -目标是发现用于乙醇电氧化的新催化剂和结构，乙醇是可以从生物来源生产的燃料，因此通过在燃料电池中使用它可以产生低温室气体排放的电源。几种金属氧化物价格低廉、储量丰富且绿色环保。由于其自身独特的性质和功能，一些纳米结构功能金属氧化物（FMO），如 CeO2、SnO2、TiO2、MnO2 正在成为燃料电池中独特的一类电极材料。在此类应用中，FMO 可以充当支撑基质，以改善催化剂的分散性及其抗烧结和颗粒聚集的稳定性；或与其他催化剂结合时促进某些电催化反应。我们将优化合成路线，以精确的方式对 FMO 进行定制设计、构建和操作，以增强其与 Pt 催化剂结合时的特定功能特性。第二个关键问题涉及 FMO 必须插入整个催化剂层中的正确方式，以增强或充分受益于其功能特性，即 FMO 在催化剂层中以不同方式排列时，无论是否添加相同的功能催化剂的电化学反应。 （主题2）生物燃料电池（BFC）的酶电极接口。-我们最近在纳米科学技术方面取得的惊人成就为我们提供了一个独特的机会，可以创造出第一个血管植入式酶生物燃料电池作为生物电子学的体内电源。我们将开发创造性的超微纳米尺度结构的生物催化电极。这种结构将由单根碳纤维制成，外层包裹着具有高等电点的碳纳米结构（CN）或过渡金属氧化物（TMO）；这涉及到 CN 或 TMO 在单根碳微纤维上的受控生长，具有挑战性。 CN 或 TMO 有望作为“纳米线”，在酶和电极表面之间实现快速直接电子转移 (DET)，从而消除使用昂贵且不具有生物相容性的传统电子介体的需要。该研究计划包括两个与材料和电化学相关的主题，即使不是发现，也创造了突破的机会。这是雄心勃勃、充满挑战的，但我们有能力和资源成功承担困难的项目，并且我们最近在两个主题上取得的引人注目的成就以及训练有素的 HQP 将为绿色燃料电池和酶催化等重要研究领域的发展做出贡献葡萄糖生物燃料电池。