Electrochemical promotion of nano-structured catalysis for green house gas mitigation

纳米结构催化的电化学促进温室气体减排

• 批准号: RGPIN-2019-05259
• 负责人: Baranova, Elena
• 金额: $ 2.4万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=746790
• 关键词: Electrochemical; promotion; nano; structured; catalysis

The main objective of the proposed research program is to use the concept of Electrochemical Promotion of Catalysis (EPOC) for efficient and energy-saving routes for green house gas mitigation. The reactions of interests are methane combustion and CO2 hydrogenation. The proposed innovative processes and catalyst design will eliminate the need for high temperature and pressure, as well as lead to higher conversions and desired product selectivity for CO2 hydrogenation to C2 and C3 products. Recent advances in electropromotion science in particular development and application of highly-dispersed nano-structured catalysts will contribute towards advancement of this project. EPOC also known as non-faradaic electrochemical modification of catalytic activity (NEMCA) is a promising concept for improving catalytic processes and advancing the frontiers of catalysis. This innovative area of catalysis aims to modify in-operando both the activity and the selectivity of catalysts, in a reversible and controlled manner. EPOC utilizes solid electrolytes (ionically conducting ceramics) as catalyst support. Ions from solid electrolytes (O2-, H+, Na+, K+, OH-, etc.) are electrochemically supplied to the catalyst surface and act as promoting species to modify the catalyst electronic properties in order to achieve optimal catalytic performance. EPOC provides a unique means of varying promoter levels at the catalyst surface under reaction conditions by simply changing the potential of the catalyst film. Moreover, promoting species such as O2- or H+ cannot be formed via gaseous adsorption and cannot be easily dosed by chemical ways. EPOC has been observed for a large number of chemical reactions promoted by a variety of catalyst-support systems. Those include reaction systems of critical importance in diverse fields of chemical synthesis including the production of commodity and fine chemicals and in the abatement of automotive emissions. In view of the above, Electrochemical Promotion opens an entire new perspective in the selective CO2 hydrogenation and methane combustion reactions by in-situ providing ionic promoters eliminating the need for high temperatures and pressures. The current project will solve the main issue of the electropromotion science: coupling dispersed catalysts at the nanometric scale with electrochemical activation. This breakthrough will open new perspectives for the systematic investigation of the role of promoters in other technological important systems, hence offering a route to design efficient catalytic formulations. In addition, the project will contribute to a better understanding of the EPOC process and, from a more general point of view, of all catalytic solutions using a promoter.

拟议研究计划的主要目标是利用电化学促进催化（EPOC）的概念为温室气体减排提供高效节能的途径。感兴趣的反应是甲烷燃烧和二氧化碳氢化。所提出的创新工艺和催化剂设计将消除对高温和高压的需求，并提高二氧化碳加氢转化为 C2 和 C3 产品的转化率和所需的产品选择性。电促进科学的最新进展，特别是高分散纳米结构催化剂的开发和应用，将有助于该项目的进展。 EPOC 也称为非法拉第催化活性电化学修饰 (NEMCA)，是改进催化过程和推进催化前沿的一个有前途的概念。这一创新的催化领域旨在以可逆和受控的方式在操作过程中改变催化剂的活性和选择性。 EPOC 利用固体电解质（离子导电陶瓷）作为催化剂载体。来自固体电解质的离子（O2-、H+、Na+、K+、OH-等）通过电化学方式供应到催化剂表面，并充当促进物种来改变催化剂的电子性质，以实现最佳的催化性能。 EPOC 提供了一种独特的方法，通过简单地改变催化剂膜的电势，在反应条件下改变催化剂表面的助催化剂水平。此外，诸如O2-或H+之类的促进物质不能通过气体吸附形成，并且不能通过化学方式轻易地定量。 EPOC 已被观察到由各种催化剂载体系统促进的大量化学反应。其中包括在化学合成的各个领域（包括商品和精细化学品的生产以及减少汽车排放）中至关重要的反应系统。鉴于上述情况，电化学促进通过原位提供离子促进剂而无需高温和高压，为选择性二氧化碳加氢和甲烷燃烧反应开辟了全新的视角。当前的项目将解决电促进科学的主要问题：纳米级分散催化剂与电化学活化的耦合。这一突破将为系​​统研究促进剂在其他重要技术系统中的作用开辟新的视角，从而为设计有效的催化配方提供一条途径。此外，该项目将有助于更好地理解 EPOC 工艺，并从更一般的角度理解所有使用促进剂的催化解决方案。