Gold, as the common current collector in solid oxide electrolysis cell(SOEC), is traditionally considered to be inert for oxygen evolution reaction at the anode of SOEC. Herein, gold nanoparticles were loaded onto con...Gold, as the common current collector in solid oxide electrolysis cell(SOEC), is traditionally considered to be inert for oxygen evolution reaction at the anode of SOEC. Herein, gold nanoparticles were loaded onto conventional strontium doped lanthanum manganite-yttria stabilized zirconia(LSM-YSZ) anode, which evidently improved the performance of oxygen evolution reaction at 800 °C. The current densities at 1.2 V and 1.4 V increased by 60.0% and 46.9%, respectively, after loading gold nanoparticles onto the LSM-YSZ anode. Physicochemical characterizations and electrochemical measurements suggested that the improved SOEC performance was attributed to the accelerated electron transfer of elementary process in anodic polarization reaction and the newly generated triple phase boundaries in gold nanoparticles-loaded LSMYSZ anode.展开更多
In this paper, we reported the fuel cell performance with La0.8Sr0.2MnO3 （LSM）/Ce0.8Sm0.2O1.9 （SDC） composite cathode prepared from LSM powders of different particle sizes via the silk-printing technique. It was f...In this paper, we reported the fuel cell performance with La0.8Sr0.2MnO3 （LSM）/Ce0.8Sm0.2O1.9 （SDC） composite cathode prepared from LSM powders of different particle sizes via the silk-printing technique. It was found that the change in particle size ofLSM nanoparticle from 40 to 90 nm resulted in an increase in the maximum power density from 132 to 228 mW/cm2 at 650 ℃ with H2 as fuel and O2 as oxidant. And the polarization resistance of the electrode decreased from 2.547 to 1.034 Ω.cm2. Concerning the particle size of electrode materials, a higher activity was anticipated with smaller particles because a large number of TPB or electrode surface sites along with a higher porosity could be developed. However, this study showed that the electrode prepared with particles of larger diameter had fine and uniform microstructure resulting in higher power density and lower overpotential, where homogeneous distribution of particles and pores was beneficial for increasing the electrochemical active area and the electronic conductivity of the electrodes as well as the gas diffusion for the reactants.展开更多
基金financial support from the National Key R&D Program of China (Grant 2017YFA0700102)the National Natural Science Foundation of China (Grants 21573222 and 91545202)+4 种基金Dalian National Laboratory for Clean Energy (DNL180404)Dalian Institute of Chemical Physics (Grant DICP DMTO201702)Dalian Outstanding Young Scientist Foundation (Grant 2017RJ03)the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant no. XDB17020200)the financial support from CAS Youth Innovation Promotion (Grant no. 2015145)
文摘Gold, as the common current collector in solid oxide electrolysis cell(SOEC), is traditionally considered to be inert for oxygen evolution reaction at the anode of SOEC. Herein, gold nanoparticles were loaded onto conventional strontium doped lanthanum manganite-yttria stabilized zirconia(LSM-YSZ) anode, which evidently improved the performance of oxygen evolution reaction at 800 °C. The current densities at 1.2 V and 1.4 V increased by 60.0% and 46.9%, respectively, after loading gold nanoparticles onto the LSM-YSZ anode. Physicochemical characterizations and electrochemical measurements suggested that the improved SOEC performance was attributed to the accelerated electron transfer of elementary process in anodic polarization reaction and the newly generated triple phase boundaries in gold nanoparticles-loaded LSMYSZ anode.
基金Project supported by National Natural Science Foundation of China (21002012, 21173042)National Basic Research Program of China (973 Program) (2013CB932902)+1 种基金Educational Commission of Jiangsu Province (JHB 2011-2)Natural Science Foundation of Jiangsu Province (BK2011589)
文摘In this paper, we reported the fuel cell performance with La0.8Sr0.2MnO3 （LSM）/Ce0.8Sm0.2O1.9 （SDC） composite cathode prepared from LSM powders of different particle sizes via the silk-printing technique. It was found that the change in particle size ofLSM nanoparticle from 40 to 90 nm resulted in an increase in the maximum power density from 132 to 228 mW/cm2 at 650 ℃ with H2 as fuel and O2 as oxidant. And the polarization resistance of the electrode decreased from 2.547 to 1.034 Ω.cm2. Concerning the particle size of electrode materials, a higher activity was anticipated with smaller particles because a large number of TPB or electrode surface sites along with a higher porosity could be developed. However, this study showed that the electrode prepared with particles of larger diameter had fine and uniform microstructure resulting in higher power density and lower overpotential, where homogeneous distribution of particles and pores was beneficial for increasing the electrochemical active area and the electronic conductivity of the electrodes as well as the gas diffusion for the reactants.
基金National High Technology Research and Development Program of China(2007AA05Z135)National Natural Science Funds for Distinguished Young Scholar(50727101)
