New 3d-transition metal-based materials for efficient anodic electrocatalysis

用于高效阳极电催化的新型 3D 过渡金属基材料

• 批准号: 433304948
• 负责人: Professor Dr. Malte Behrens
• 金额: --
• 依托单位: Forschungsgruppe Anorganische Festkörperchemie I
• 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/433304948?language=en
• 关键词: New; 3d; transition; metal; based

Anodic reactions that can be used as an alternative to the difficult oxygen evolution to facilitate the electrochemical generation of hydrogen at the cathode are, for example, the oxidation of alcohols or of ammonia. For these reactions, new electrocatalysts have to be developed. This project, within the research group UNODE (UNusual anODE reactions in electrochemical energy conversion: Value creation rather than oxygen evolution in hydrogen production), investigates two classes of 3d transition metal compounds with respect to their catalytic potential in alkaline electrolytes. On the one hand, binary hydoxycarbonate mixed salts are prepared by co-precipitation and their composition is varied. On the other hand, spinel oxides are also produced with variable composition either by calcination of the hydroxy carbonates or as so-called high entropy compounds. Through comprehensive solid-state chemical characterization and electrochemical testing with respect to activity, selectivity and stability, correlations between composition as well as structure and these catalytic properties will be studied. Through iterative optimization, new and highly effective electrocatalysts will thus be developed and investigated within the framework of the collaboration in the research group regarding reaction mechanisms.

阳极反应可以用来替代困难的析氧过程，以促进阴极上氢的电化学生成，例如醇或氨的氧化。对于这些反应，必须开发新的电催化剂。该项目隶属于研究小组UNODE（电化学能量转换中的异常阳极反应：创造价值而不是产氢过程中的氧气演化），研究了两类三维过渡金属化合物在碱性电解质中的催化潜力。一方面，采用共沉淀法制备了二元碳酸氢盐混合盐，其组成多种多样。另一方面，尖晶石氧化物也可以通过煅烧羟基碳酸盐或作为所谓的高熵化合物以不同的成分生产。通过全面的固态化学表征和电化学测试，研究其活性、选择性和稳定性，以及组成和结构与这些催化性能之间的关系。通过迭代优化，新的高效电催化剂将因此被开发出来，并在研究小组关于反应机制的合作框架内进行研究。