花瓣状SnSe/rGO复合材料的制备及其电催化氧还原性能  

Preparation of the Reduced Graphene Oxide-Based Tin Selenide Nano-Petal Composite and Its Electrocatalytic Properties

作　　者：王亚男 孟楚楚 裴笠然 王栖桐 李君华[1] 钱建华[1] WANG Yanan;MENG Chuchu;PEI Liran;WANG Xitong;LI Junhua;QIAN Jianhua(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China;Department of Innovation and Technology,Shenyang Hangsheng Technology Co.,Ltd.,Shenyang Liaoning 110035,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [2]沈阳航盛科技有限责任公司创新技术部,辽宁沈阳110035

出　　处：《辽宁石油化工大学学报》2024年第6期42-50,共9页Journal of Liaoning Petrochemical University

基　　金：国家自然科学基金项目(21878024)。

摘　　要：采用微波法一步实现氧化石墨烯还原与SnSe的原位负载及界面组装,成功制备了还原氧化石墨烯(rGO)负载花瓣状SnSe复合材料(SnSe/rGO)。通过拉曼光谱、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)等分析手段对SnSe/rGO进行表征,并研究了rGO质量分数对复合材料电催化氧还原反应(ORR)性能的影响。结果表明,SnSe与基体rGO之间产生相互作用,并以Sn—C和Sn—O—C为电荷转移的桥梁;花瓣状SnSe与rGO紧密结合,形成了较为稳固的三维网状结构,支撑催化剂总体结构不坍塌;SnSe/10%rGO催化剂(10%rGO表示rGO的质量分数为10%)具有良好的ORR活性,其极限电流密度为3.79 mA/cm^(2),起始电压(vs.RHE)为0.85 V,电子转移数为3.10;具有比商业20%Pt/C催化剂(20%Pt表示Pt质量分数为20%)更为优良的电催化长期稳定性:反应20000 s后的相对电流密度仍能保持81.15%。研究结果为燃料电池用非贵金属阴极ORR催化材料的制备提供了思路。The reduction of graphene oxide(GO),in-situ loading of SnSe and interface assembly were achieved simultaneously by microwave method,and the reduced graphene oxide(rGO)-supported the petal-shaped SnSe(SnSe/rGO)composite was successfully prepared.The SnSe/rGO was characterized by Raman spectroscopy,X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy(SEM),and the effects of different rGO contents for SnSe/rGO composite on the electrocatalytic oxygen reduction reaction(ORR)were investigated.The results indicated that there was an interaction between SnSe and matrix rGO,and Sn−C and Sn−O−C bonds were used as bridges of charge transfer.The intimate interconnection between the petal-like SnSe and the rGO formed a robust three-dimensional mesh structure,which served to reinforce the overall structural integrity of the catalyst,preventing its collapse.Based on this,the optimized SnSe/10%rGO catalyst(10rGO means that the mass fraction of rGO is 10%)exhibited excellent ORR activity with a limiting current density of 3.79 mA/cm^(2),an onset voltage(vs.RHE)of 0.85 V,and an electron transfer number of 3.10.Meanwhile,the SnSe/10%rGO catalyst performed the electrocatalysis long-term stability superior that of commercial 20%Pt/C(20%Pt means that the mass fraction of Pt is 20%)with the current density remaining 81.15%of the start value after 20000 s of reaction.The present work offers insights into the preparation of non-precious metal cathode oxygen reduction catalytic materials for fuel cells.

关 键 词：硒化锡 还原氧化石墨烯 氧气还原 燃料电池 微波法 

分 类 号：TQ134.32[化学工程—无机化工]