Double-ligand strategy for preparing non-noble metal oxygen reduction electrocatalyst

• Main Authors: XU LI, YUE XIANJIN, XIANG ZHONGHUA
• Format: Patent
• Language: Chinese; English
• Published: 22.11.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to a double-ligand strategy for preparing a non-noble electrocatalyst used for acidic oxygen reduction. A metal organic framework polymer with uniformly distributed iron, nitrogen and carbon is synthesized through a simple and easily available method, and a Fe-Nx/C type acidic oxygen reduction catalyst is prepared through high-temperature carbonization. According to the method, zinc salt and ferric salt are used as metal sources, and the catalytic oxygen reduction activity of the catalyst is regulated and controlled by regulating and controlling the contents of two organic ligands in the metal organic framework polymer. The material is simple and convenient in synthesis method and low in raw material cost, and has high-efficiency oxygen reduction activity and relatively good stability under an acidic condition. 本发明涉及一种运用双配体策略制备用于酸性氧还原反应的非贵金属电催化剂。通过简单易得的方法合成了一种铁、氮、碳均匀分布的金属有机框架聚合物，并通过高温碳化制备了Fe-Nx/C型的酸性氧还原催化剂。本方法采用锌盐和铁盐作为金属源，通过调控两种有机配体在金属有机框架聚合物中的含量进而对催化剂催化氧还原的活性进行调控。该材料不仅合成方法简便、原料成本低廉，而且在酸