磷钌双掺杂钴基碳纳米材料的制备及性能研究  

Preparation and Properties of Phosphorus Ruthenium Double-Doped Co-Based Carbon Nanomaterials

作　　者：冯莹莹 王丹 Feng Yingying;Wang Dan(College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《山东化工》2021年第20期15-18,共4页Shandong Chemical Industry

基　　金：青岛科技大学启动基金(Doctoral Found of QUST(0100229009))。

摘　　要：沸石咪唑酯骨架材料(ZIFs)在高温煅烧中易出现金属基离子团聚,孔道缩减,表面氮含量急剧减少等问题,获得的ZIFs衍生物的催化性能往往不高。针对这些问题,我们首先构筑了立方体双金属Co/Zn-ZIFs。利用植酸作为P源,三氯化钌作为Ru源,与上述Co/Zn-ZIFs以及三聚氰胺混合。在氮气氛围下900℃热解,得到钌修饰磷化钴分散在氮磷共掺杂多孔碳(RuCoP@NPC)。实验结果表明,由于RuCoP@NPC中高含量的氮掺杂碳和石墨化碳,丰富的Ru_(x)P和Co_(x)P粒子和均匀分散的纳米钴颗粒,使其具有优异的氧还原/析出催化活性。半波电位接近0.82 V,过电位为0.4 V,优于商用Pt/C和RuO_(2)催化剂。基于RuCoP@NPC正极的锌-空气电池具有超长循环寿命(10 mA·cm^(-2)下稳定循环965圈)和高的功率密度(116 mW·cm^(-2))等良好的电化学性能。During the calcination of zeolitic imidazolate frameworks(ZIFs)at high temperature,problems such as metal-based ion agglomeration,pore shrinkage and sharp reduction of surface nitrogen content are likely to occur,the catalytic performance of the obtained ZIFs derivatives is often not high.To solve these problems,we first constructed cubic bimetallic Co/Zn-ZIFs.Phytic acid was used as P source,ruthenium trichloride as Ru source,which were mixed with the above Co/Zn-ZIF and melamine.After pyrolysis in nitrogen atmosphere at 900℃,ruthenium-modified cobalt phosphide dispersed in nitrogen-phosphorus co-doped porous carbon(RuCoP@NPC)was obtained.The experimental results show that due to the high content of nitrogen-doped carbon,graphitized carbon,abundant Ru_(x)P、Co_(x)P particles and uniformly dispersed nano-cobalt particles in RuCoP@NPC,it has excellent oxygen reduction/evolution catalytic activity.The half wave potential is close to 0.82 V and the overpotential is 0.4 V,which are better than commercial Pt/C and RuO_(2) catalysts.The zinc-air battery with RuCoP@NPC cathode has excellent electrochemical performance such as long cycle life(965 cycles at 10 mA·cm^(-2))and high power density(116 mW·cm^(-2)).

关 键 词：锌空气电池 金属有机骨架 催化剂 钴纳米粒子 

分 类 号：TQ132.41[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程]