高分散性纳米颗粒CuN@NC的制备及其电催化性能  

Preparation of Highly Dispersed Nanoparticles CuN@NC and Its Electrocatalytic Properties

作　　者：黄肖 张珍 陈跃 陈宇梦 牛以诺 赵思远 袁乐 朱艳玲 秦国旭 王楠楠 HUANG Xiao;ZHANG Zhen;CHEN Yue;CHEN Yumeng;NIU Yinuo;ZHAO Siyuan;YUAN Le;ZHU Yanling;QIN Guoxu;WANG Nannan(College of Chemistry and Materials Engineering,Chaohu University,Anhui Hefei 238024,China)

机构地区：[1]巢湖学院化学与材料工程学院,安徽合肥238024

出　　处：《广州化工》2024年第20期23-26,共4页GuangZhou Chemical Industry

基　　金：巢湖学院大学生创新训练项目(No.202210380037);巢湖学院高层次人才科研启动项目(KYQD-202103)。

摘　　要：过渡金属氮化物其独特的物理化学性质和高效的催化活性成为当前研究的重点。以尿素、CuCl_(2)和NaCl混合物为原材料,无水乙醇作为溶剂,采用一锅合成法制备了高性能的氧还原反应(ORR)催化剂高分散的CuN@NC颗粒。透射电子显微镜(TEM)测试表明,CuN@NC亚纳米颗粒均匀的分散在N掺杂石墨碳载体上,并在载体和颗粒之间建立了强关联相互作用。这种相互作用锚定并保护了活性颗粒,提升了材料的稳定性。通过计时电流法测试,电化学活性在70 000 s模拟反应后仅衰减10%。ORR动力学分析表明,催化剂在高电位下的Tafel斜率为91 mV·dec^(-1),在低电位下为135 mV·dec^(-1),与市售参考催化剂的数值非常接近,表明它们的反应机理相似。Transition metal nitrides with their unique physicochemical properties and efficient catalytic activity have become the focus of current research.Highly dispersed CuN@NC particles for high-performance oxygen reduction reaction(ORR)catalysts were prepared by a one-pot synthesis method using a mixture of urea,CuCl_(2) and NaCl as raw materials and anhydrous ethanol as solvent.TEM tests showed that CuN@NC sub-nanoparticles were uniformly dispersed on N-doped carbon carriers and strong associative interactions were established between the carriers and the particles.This interaction anchored and protected the active particles and enhanced the stability of the material.The electrochemical activity was only decayed by 10%after 70000 s simulated reaction as tested by the chronoamperometry method.ORR kinetic analysis showed that the Tafel slope of the catalysts was 91 mV·dec^(-1) at high potentials and 135 mV·dec^(-1) at low potentials,which were very close to the values of the commercially available reference catalysts,indicating that they have similar reaction mechanisms.

关 键 词：氧还原反应 氮化铜 电催化剂 

分 类 号：O643.3[理学—物理化学]