TY - JOUR
T1 - Novel in-situ MgO nano-layer decorated carbon-tolerant anode for solid oxide fuel cells
AU - Xie, Yun
AU - Shi, Nai
AU - Hu, Xueyu
AU - Liu, Minqian
AU - Yang, Yi
AU - Huan, Daoming
AU - Pan, Yang
AU - Peng, Ranran
AU - Xia, Changrong
N1 - Funding Information:
This work was financially supported by the National Key Research and Development Program of China ( 2017YFA0402800 ), the National Natural Science Foundation of China ( 51872276 ), XPS measurements were performed at the beamline BL12B-a and BL10B in the National Synchrotron Radiation Laboratory (NSRL) in Hefei, P. R. China.
Publisher Copyright:
© 2020 Hydrogen Energy Publications LLC
PY - 2020/4/14
Y1 - 2020/4/14
N2 - The grievous carbon deposition in Ni-based anode limits its practical application in solid oxide fuel cells for methane conversion. In this work, nano-layer MgO decorated Ni-based anode is successfully prepared by in-situ reduction of Ni0.9-xCu0.1MgxO solid solution. Peak power density of 670 mW cm−2 at 700 °C in humid methane is achieved using Ni0.875Cu0.1-0.025MgO/Sm0.2Ce0.8O2 anode thanks to the improved active surface and the special modulation effect of MgO nano-layer on anode reactions. Interestingly, synchrotron vacuum ultraviolet photoionization mass spectra and high temperature X-ray photoelectron spectra jointly suggest that the effect of MgO on carbon resistance differs with the operating temperatures, which accelerates the steam reforming of CH4 via improving dissociative adsorption of acidic gas H2O at ∼500 °C, while depresses CH4 cracking to carbon and improves the formation of light olefin at ∼700 °C. In addition, possible methane reaction paths over such anode are derived.
AB - The grievous carbon deposition in Ni-based anode limits its practical application in solid oxide fuel cells for methane conversion. In this work, nano-layer MgO decorated Ni-based anode is successfully prepared by in-situ reduction of Ni0.9-xCu0.1MgxO solid solution. Peak power density of 670 mW cm−2 at 700 °C in humid methane is achieved using Ni0.875Cu0.1-0.025MgO/Sm0.2Ce0.8O2 anode thanks to the improved active surface and the special modulation effect of MgO nano-layer on anode reactions. Interestingly, synchrotron vacuum ultraviolet photoionization mass spectra and high temperature X-ray photoelectron spectra jointly suggest that the effect of MgO on carbon resistance differs with the operating temperatures, which accelerates the steam reforming of CH4 via improving dissociative adsorption of acidic gas H2O at ∼500 °C, while depresses CH4 cracking to carbon and improves the formation of light olefin at ∼700 °C. In addition, possible methane reaction paths over such anode are derived.
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U2 - 10.1016/j.ijhydene.2020.02.117
DO - 10.1016/j.ijhydene.2020.02.117
M3 - Article
AN - SCOPUS:85081976673
SN - 0360-3199
VL - 45
SP - 11791
EP - 11801
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 20
ER -
