铁单原子及碳化铁复合催化剂的制备及电催化应用  

Preparation and Electrocatalytic Application of Single-atomic and Nanoparticle Catalysts

作　　者：李泊林 戴靓丽 胡一凡 LI Bolin;DAI Liangli;HU Yifan(College of Chemical Engineering,Guangdong University of Petrochemical Technology,Maoming 525000,China)

机构地区：[1]广东石油化工学院化学工程学院,广东茂名525000

出　　处：《广东石油化工学院学报》2024年第3期64-67,共4页Journal of Guangdong University of Petrochemical Technology

基　　金：广东石油化工学院科研基金项目(XJ2022000101);广东石油化工学院教育教学改革研究项目(JY202240)。

摘　　要：采用球磨-煅烧方法,一次制备出铁单原子-纳米颗粒混合催化剂和钌-铁双金属电催化剂(Ru-Fe DMCs)两种不同类型的催化剂。这两种低成本且容易制备的催化剂尤其是铁单原子-纳米颗粒混合催化剂在碱性溶液中表现出了优异的析氧反应(OER)性能,在10和50 mA/cm^(2)的电流密度下具有275 mV和403 mV的低过电位,经过12 h的稳定性实验,其OER催化性能未见明显改变。针对铁单原子-纳米颗粒混合催化剂重点分析了其结构以及元素价态和组成,研究表明铁单原子-纳米颗粒混合催化剂是一种呈现多孔层碳纳米片状的铁单原子与铁纳米颗粒共存的混合催化剂,能显著提高电化学析氧反应的性能及稳定性。Two different types of catalyst materials were prepared by a simple ball-milled calcination method,which were Fe-single-atom-nanoparticle mixed electrocatalyst(Fe1-FeNPs)and Ru-Fe bimetallic electrocatalyst(Ru-Fe DMCs).These two low-cost and easily prepared catalysts,especially the iron single atom nano particle mixed catalysts(Fe1-FeNPs),exhibit excellent OER performance in alkaline solutions,with low overpotentials of 275 mV and 403 mV at current densities of 10 and 50 mA·cm^(-2).After 12 hours of stability experiments.Their OER catalytic performance remains unchanged and shows good application prospects.The study focused on analyzing the structure,elemental valence states,and composition of iron single atom nano particle mixed catalysts(Fe1-FeNPs).It can be concluded that iron single atom nano particle mixed catalysts(Fe1-FeNPs)are a mixed catalyst that coexists with iron single atoms and iron nanoparticles in the form of porous carbon nanosheets and can significantly improve the performance and stability of electrochemical OER reactions.

关 键 词：球磨煅烧法 原子及纳米颗粒催化剂 协同机理 电催化应用 

分 类 号：O644.14[理学—物理化学]