Superaerophobic porous 3D catalytic electrodes for water splitting

用于水分解的超疏气多孔3D催化电极

• 批准号: 521504-2018
• 负责人: Guay, Daniel
• 金额: $ 16.65万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=694637
• 关键词: Superaerophobic; porous; 3D; catalytic; electrodes

Electrolytic gas evolution reactions (GERs) are important in numerous electrochemical reactions and processes like alkaline water and chlorine electrolysis. The efficiency of such electrochemical processes depend on the proper choice of electrocatalytic materials that can achieve high reaction rates (i.e. high current densities) at the lowest possible overpotential. However, the formation of adhering bubbles at the electrode surface has a detrimental effect on the cell performance by decreasing the contact between the catalyst surface and the reactants, as well as increasing the ohmic drop. The overarching goal of this proposal is to foster passive management of bubbles through nano-engineering of the electrode surface. Thus, a comprehensive study of the effect of nano-morphology of the electrode surface will be undertaken with the objectives of decreasing bubble size, adhesion force and residence time. This will be achieved using additive manufacturing approach leveraging the expertise of our industrial partners (NRC-Boucherville, Centerline and Vac Aero) with the objective of developing new knowledge AND identifying a proper way to mass produce electrodes with improved passive gas bubbles management on scales required for integration into manufacturing products for said markets like water electrolysers in conjunction with Hydrogenics. In terms of operating parameters, improved management of gas bubbles at GER electrodes will have several benefits: (i) strong diminution of gas blanketing; (2) enhance local heat/mass transfer coefficients, therefore permitting higher current density operation, and (3) use of bubble flow and gas lift to minimize parasitic losses from external fluid management in near-zero gap electrochemical cells that will translate into reduced overpotentials, increased current density, and higher overall process efficiency. A total of 10 HQPs are going to be trained, including 2PhDs, 2MScs, 2PDFs and 4 undergraduates.

电解气体进化反应（GER）在许多电化学反应和碱性水和氯电解等过程中很重要。此类电化学过程的效率取决于适当的电催化材料的选择，这些材料可以以最低的电势可以达到高反应速率（即高电流密度）。 然而，通过减少催化剂表面和反应物之间的接触以及增加欧姆滴的滴滴，在电极表面的粘附气泡形成对细胞性能产生了不利影响。该提案的总体目标是通过电极表面的纳米工程来促进气泡的被动管理。因此，将对电极表面纳米形态的影响进行全面研究，以减小气泡大小，粘附力和停留时间的目标。这将是利用加法制造方法来实现的，该方法利用了我们的工业合作伙伴（NRC-Boucherville，Centerline和Vac Aero）的专业知识，目的是开发新知识并确定一种适当的方式，以在与加氢发光量相结合的水上产品集成到类似于水的市场中的制造产品所需的量表上，以改进的尺度上产生电极，以改进的被动气体气泡管理。 就操作参数而言，改善GER电极气泡的管理将有几个好处：（i）气体覆盖的强烈减少； （2）增强局部热量/传质系数，因此允许更高的电流密度运行，（3）使用气泡流量和气体提升以最大程度地减少近零间隙电化学细胞中外流体管理中的寄生损失，这些电池将转化为降低的超电位，电流密度提高，总体过程效率提高。总共将培训10个HQP，包括2phds，2MSC，2PDF和4名本科生。