叶片状Zn-N共掺杂的碳用于高效氧还原反应  

Zn-N Codoped Carbon with Leaf-shaped for Highly Efficient Oxygen Reduction Reaction

作　　者：刁金香[1] 王凡[1] 刘肖杰 DIAO Jinxiang;WANG Fan;LIU Xiaojie(Department of Aviation Maintenance Engineering,Aeronautical Polytechnic Institute,Xi’an 710089,China;Key Laboratory of Synthetic and Natural Functional Molecule Chemistry(Ministry of Education),College of Chemistry&Materials Science,Northwest University,Xi’an 710069,China)

机构地区：[1]西安航空职业技术学院航空维修工程学院,西安710089 [2]西北大学化学与材料科学学院,合成与天然功能分子化学教育部重点实验室,西安710069

出　　处：《人工晶体学报》2020年第4期665-671,共7页Journal of Synthetic Crystals

基　　金：国家自然科学基金(21902150);陕西省自然科学基金(2019JM-080);西航职院科研基金(18XHZH-019,18XHZH-021)。

摘　　要：开发具有氧还原性能的碳基催化剂,以替代昂贵且不稳定的铂基催化剂,对于它们在能量转换和存储中的最佳利用至关重要。本论文叶片状Zn,N共掺杂的碳基(Zn-N codoped C)材料通过在NH3条件下,热处理叶片状沸石咪唑酯框架(ZIF-L)获得,结果表明,Zn-N共掺杂碳具有优越的氧还原性能,起始过电压为0.95 V,半波电位0.80 V,极限电流密度5.57 mA·cm^-2,在碱性条件下,性能类似商业Pt/C催化剂性能。The development of carbon-based oxygen reduction reaction(ORR) catalysts to substitute the expensive and unstable platinum-based ORR catalysts is of great importance for their optimal utilization in energy conversion and storage. Here, Zn, N codoped carbon with leaf-shaped was prepared using leaf-shaped Zeolitic Imidazolate Framework(ZIF-L) as precursor via thermal annealing under NH3. As a result, the as-synthesized Zn-N-C presents outstanding ORR onset-potential(0.95 V), half-wave potential(0.80 V), and diffusion limiting current density(5.57 mA·cm^-2), that is similar to that at commercial Pt/C catalyst in alkaline electrolyte.

关 键 词：Zn-N共掺杂碳 氧还原反应 沸石咪唑酯框架 

分 类 号：O643.36[理学—物理化学]