共轭微孔聚合物衍生的非贵金属氧还原反应电催化剂

Conjugated microporous polymer derived non-noble metal electrocatalyst for efficient oxygen reduction reaction

共轭微孔聚合物(conjugated microporous polymers,CMP)具有组成结构可调、比表面积大、热稳定高等特点,由其衍生的氮掺杂碳被认为在氧还原反应电催化中有良好的应用前景。以吡啶基CMP为前驱体,通过回流法引入铁原子,经过多次热解得到FeNCs系列催化剂。对FeNCs的化学结构与形貌进行表征,并对其氧还原电催化性能进行测试。结果表明:FeNCs系列催化剂的起始电位(E_(onset))和半波电位(E_(1/2))最高可达0.947和0.869 V,优于商业Pt/C催化剂(E_(onset)=0.920 V,E_(1/2)=0.848 V);与商业Pt/C催化剂相比,FeNCs表现出更为突出的催化稳定性和甲醇耐受性。

Conjugated microporous polymers(CMP)are characterized by adjustable composition,large specific surface area and high thermal stability,and the nitrogen-doped carbon derived from them is considered to have promising applications in electrocatalysis for oxygen reduction reactions.Using pyridine-based CMP as precursor,FeNCs series catalysts were obtained by reflux method with the introduction of iron atoms and multiple pyrolysis.The chemical structure and morphology of FeNCs were characterized,and their oxygen reduction electrocatalytic performance was tested.The results show that the starting potential(E onset)and half-wave potential(E_(1/2))of FeNCs catalysts can reach 0.947 and 0.869 V,which are better than commercial Pt/C catalysts(E_(onset)=0.920 V,E_(1/2)=0.848 V).In addition,FeNCs exhibits more outstanding catalytic stability and methanol tolerance compared to commercial Pt/C catalysts.