BiMn共掺Pd修饰GO/MOF-74-Co复合材料设计与电催化氧化乙二醇性能  

Design of BiMn-doped Pd modified GO/MOF-74-Co composites for electrocatalytic oxidation of ethylene glycol

作　　者：莫晗 万正睿 钟玉婷 吴祉睿 胡亚兰 刘红英[1] 周立群[1] MO Han;WAN Zhengrui;ZHONG Yuting;WU Zhirui;HU Yalan;LIU Hongying;ZHOU Liqun(College of Chemistry and Chemical Engineering,Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry,Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules,Hubei University,Wuhan 430062,China)

机构地区：[1]湖北大学化学化工学院,有机化工新材料省部共建协同创新中心有机功能分子合成与应用教育部重点实验室,武汉430062

出　　处：《复合材料学报》2022年第1期203-212,共10页Acta Materiae Compositae Sinica

基　　金：有机功能分子合成与应用教育部重点实验室项目(KLSAOFM1913);湖北省大学生创新训练计划项目(S202010512075)。

摘　　要：将BiMn共掺Pd的合金纳米粒子成功地修饰到三维棱锥柱状的还原氧化石墨烯(rGO)/金属有机骨架(MOFs)-74-Co上,得到一种新型复合电催化剂PdBiMn@rGO/MOF-74-Co,其中Pd-Bi-Mn的平均粒径约7.8 nm,MOF-74-Co为多孔的面心六角单元结构。该PdBiMn@rGO/MOF-74-Co催化剂在碱性条件下电催化氧化乙二醇(EG)表现出最高的催化活性和耐久性。优异的电催化性能主要归结于Pd-Bi-Mn纳米合金的形成,其具有强的协同效应和较多的反应活性中心,有利于含氧物种的吸附,使其抗毒性和稳定性显著增强;同时载体r GO/MOF-74-Co独特的微结构使催化剂具有优异的电子传递性能和多孔特性。此外,对EG的电催化氧化机制给出了详细分析。这种新型复合材料的设计和杰出的催化性能为直接醇类燃料电池(DAFCs)的开发和应用提供了重要参考。BiMn co-doped Pd alloy nanoparticles were successfully modified on the 3D pyramidal columnar-like reduced graphene oxide(rGO)/metal-organic frameworks(MOFs)-74-Co to obtain a new composite electrocatalyst PdBiMn@rGO/MOF-74-Co in which the mean particle diameter of Pd-Bi-Mn particles was about 7.8 nm,and MOF-74-Co was a porous face-centered hexagonal unit cell.PdBiMn@rGO/MOF-74-Co catalyst exhibites the highest catalytic activity and durability towards ethylene glycol(EG)electrooxidation under alkaline condition.The excellent electrocatalytic performance is mainly attributed to the strong synergistic effects of Pd,Bi and Mn nanoalloys and abundant reaction active sites in the catalyst,which are beneficial to adsorb more oxygen-containing substances and significantly enhance the resistance to toxicity and stability of the ternary catalyst.Furthermore,the unique microstructure of rGO/MOF-74-Co can provide superior electron transfer properties and multi-porous for the PdBiMn@rGO/MOF-74-Co electrocatalyst.Besides,the mechanism of electrocatalytic oxidation of EG drew up a detailed analysis.The novel composites’design and outstanding performance would provide an essential reference for the application and development of direct alcohol fuel cells(DAFCs).

关 键 词：Pd-Bi-Mn纳米合金 氧化石墨烯 MOF-74-Co 电催化氧化 乙二醇 

分 类 号：TB331[一般工业技术—材料科学与工程] O643.3[理学—物理化学]