Coordination Funds

协调基金

• 批准号: 316981934
• 负责人: Professor Dr.-Ing. Thomas Turek
• 金额: --
• 依托单位: Institut für Chemische und Elektrochemische Verfahrenstechnik
• 依托单位国家: 德国
• 项目类别: Research Units
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/316981934?language=en
• 关键词: Coordination; Funds

Gas-diffusion electrodes (GDE) are key components for several relevant electrochemical processes such as fuel cells, metal-air batteries and electrolysis processes with fundamental importance for the energy turnaround. In the research unit, the oxygen reduction and the CO2 electrolysis over silver-based GDE in aqueous electrolyte shall be studied as examples. The preparation methods for these GDE must ensure high electro-catalytic activity, low electronic resistance as well as high chemical and mechanical stability. The morphology of the GDE pore system plays a decisive role for these requirements, since only a proper combination of hydrophilic and hydrophobic properties gives rise to intimate contact between liquid electrolyte, gaseous reactants and the electro-catalyst. A detailed description of GDE has only been partially possible up to now. This is due to the complex interplay of processes, missing methods for spatially resolved in situ and in operando observations using working GDE, and the limited availability of models with sound physico-chemical basis. The research unit shall combine competencies in the fields of electrode preparation, tomography, modeling of phase distribution and transport, micro-electrochemistry as well as analysis and modeling of micro- and macro-kinetics on all relevant scales. Thus, the complex interaction of transport and reaction processes can be understood and quantitatively described. In the proposed coordination project, the necessary resources for the general support measures within the group as well as for electrode preparation and manufacture of half cells for all partners are requested.

气体扩散电极（GDE）是燃料电池、金属-空气电池和电解过程等相关电化学过程的关键部件，对能量转换具有重要意义。本研究单元以银基GDE在水溶液中的氧还原和CO2电解为例进行研究。这些GDE的制备方法必须保证高的电催化活性，低的电子电阻以及高的化学和机械稳定性。GDE孔系统的形态对这些要求起着决定性的作用，因为只有亲疏水性质的适当结合才能使液体电解质、气体反应物和电催化剂之间紧密接触。到目前为止，对GDE的详细描述只是部分可行的。这是由于过程的复杂相互作用，缺乏使用工作GDE进行空间分辨的原位和操作观测的方法，以及具有良好物理化学基础的模型的有限可用性。研究单位应结合电极制备、断层扫描、相分布和输运建模、微观电化学以及所有相关尺度上微观和宏观动力学的分析和建模等领域的能力。因此，传递和反应过程的复杂相互作用可以被理解和定量描述。在拟议的协调项目中，需要为集团内部的一般支持措施以及为所有合作伙伴准备电极和制造半电池提供必要的资源。