Fabrication and characterization of tailored electrodes as model systems

TP 3 Roth的主要目标是为ORR和CO2 RR制造专门定制的Ag基电极，并对其进行系统的结构和电化学表征。这些电极在外观上与TP 1 Turek的技术电极非常相似，但使用自制的尺寸和形状选择的Ag纳米颗粒，以深入了解CO2 RR的结构灵敏度。H电池中3电极测试的结果将转移至气体扩散电极（GDE）。具体重点将放在液体电解质中的低CO2浓度与提供给GDE的气相CO2之间的差异上。TP 3 Roth分为4个工作包：在AP 1中，与TP 1 Turek直接合作，将通过静电纺丝制造所谓的限制区域电极，并将与TP 4 Manke一起进一步开发用于射线照相/断层扫描测量的ORR池的原位池设计。AP 2将专注于尺寸和形状选择的Ag纳米颗粒的合成及其在液体电解质中具有低浓度CO2的H电池中的电化学测试。将获得的结果转移到气体扩散电极和高浓度气相CO2（AP 3）。AP 4致力于开发可靠和复杂的CO2 RR分析（气相和液相），涉及合作伙伴解决的各个方面，以及开发合适的细胞和样品环境。

The main objective of TP 3 Roth is the fabrication of specifically tailored Ag-based electrodes for ORR and CO2RR and their systematic structural and electrochemical characterization. These electrodes will be rather similar in appearance to the technical electrodes of TP 1 Turek, but use home-made size and shape-selected Ag nanoparticles to obtain in-depth insight into the structure sensitivity of the CO2RR. Results from 3-electrode tests in an H cell will be transferred to gas diffusion electrodes (GDE). Specific emphasis will be placed on the difference between low CO2 concentrations in liquid electrolyte as compared to gas phase CO2 offered to the GDE. TP 3 Roth is divided into 4 work packages: in AP 1 and in direct collaboration with TP 1 Turek so-called limiting region-electrodes will be fabricated via electrospinning and the in-situ cell design of the ORR cell for radiography/tomography measurements will be further developed together with TP 4 Manke. AP 2 will focus on the synthesis of size- and shape-selected Ag nanoparticles und their electrochemical testing in an H cell with low concentrated CO2 in the liquid electrolyte. Results obtained will be transferred to gas diffusion electrodes and highly concentrated gas phase CO2 (AP 3). AP 4 is dedicated to the development of a reliable and sophisticated CO2RR analysis (gas and liquid phase) with respect to the various aspects tackled by the collaboration partners and the development of suitable cells and sample environments.