首页|Enhancing layered perovskite ferrites with ultra-high-density nanoparticles via cobalt doping for ceramic fuel cell anode
Enhancing layered perovskite ferrites with ultra-high-density nanoparticles via cobalt doping for ceramic fuel cell anode
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
Nanoparticles anchored on the perovskite surface have gained considerable attention for their wide-ranging applications in heterogeneous catalysis and energy conversion due to their robust and integrated structural configuration.Herein,we employ controlled Co doping to effectively enhance the nanoparticle exsolution process in layered perovskite ferrites materials.CoFe alloy nanoparticles with ultra-high-density are exsolved on the(PrBa)0.95(Fe0.8Co0.1Nb0.1)2O5+δ(PBFCN0.1)surface under reducing atmo-sphere,providing significant amounts of reaction sites and good durability for hydrocarbon catalysis.Under a reducing atmosphere,cobalt facilitates the reduction of iron cations within PBFCN0.1,leading to the formation of CoFe alloy nanoparticles.This formation is accompanied by a cation exchange process,wherein,with the increase in temperature,partial cobalt ions are substituted by iron.Meanwhile,Co dop-ing significantly enhance the electrical conductivity due to the stronger covalency of the Co-O bond compared with Fe-O bond.A single cell with the configuration of PBFCN0.1-Sm0.2Ce0.8O1.9(SDC)|SDC|Ba0.5Sr0.5Co0.8Fe0.2O3-δ(BSCF)-SDC achieves an extremely low polarization resistance of 0.0163 Ω cm2 and a high peak power density of 740 mW cm-2 at 800 ℃.The cell also shows stable operation for 120 h in H2 with a constant current density of 285 mA cm-2.Furthermore,employing wet C2H6 as fuel,the cell demonstrates remarkable performance,achieving peak power densities of 455 mW cm-2 at 800 ℃ and 320 mW cm-2 at 750 ℃,marking improvements of 36％and 70％over the cell with(PrBa)0.95(Fe0.9Nb0.1)2O5+a(PBFN)-SDC at these respective temperatures.This discovery emphasizes how temperature influences alloy nanoparticles exsolution within doped layered perovskite ferrites materials,paving the way for the development of high-performance ceramic fuel cell anodes.
State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,Shenzhen University & Sichuan University,Shenzhen 518060,Guangdong,China
School of Energy and Environment,City University of Hong Kong,Kowloon 999077,Hong Kong,China
National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology,Key Laboratory of Advanced Battery Materials of Yunnan Province,Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China
National Natural Science Foundation of China ProjectNational Natural Science Foundation of China ProjectGuangdong Basic and Applied Basic Research Committee Foundationassistance on HRTEM observation received from the Electron Microscope Center of Shenzhen University
NETL
NSTL
万方数据
