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Liu, Meilin
Liu Research Group
Research Interests
  • Fuel Cells
  • Batteries
  • Supercapacitors
  • Sensors

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Promotion of water-mediated carbon removal by nanostructured barium oxide/nickel interfaces in solid oxide fuel cells

Cited 59 times inthomson ciCited 56 times inthomson ci
Title
Promotion of water-mediated carbon removal by nanostructured barium oxide/nickel interfaces in solid oxide fuel cells
Author
Yang, LeiChoi, YongManQin, WentaoChen, HaiyanBlinn, KevinLiu, MingfeiLiu, PingBai, JianmingTyson, Trevor A.Liu, Meilin
Keywords
DENSITY-FUNCTIONAL THEORY; MINIMUM ENERGY PATHS; ELASTIC BAND METHOD; SADDLE-POINTS; SYNTHESIS GAS; METHANE FUEL; ANODE; NI; OXIDATION; TEMPERATURE
Issue Date
2011-06
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v.2, no.357, pp. -
Abstract
The existing Ni-yttria-stabilized zirconia anodes in solid oxide fuel cells (SOFCs) perform poorly in carbon-containing fuels because of coking and deactivation at desired operating temperatures. Here we report a new anode with nanostructured barium oxide/nickel (BaO/Ni) interfaces for low-cost SOFCs, demonstrating high power density and stability in C(3)H(8), CO and gasified carbon fuels at 750 degrees C. Synchrotron-based X-ray analyses and microscopy reveal that nanosized BaO islands grow on the Ni surface, creating numerous nanostructured BaO/Ni interfaces that readily adsorb water and facilitate water-mediated carbon removal reactions. Density functional theory calculations predict that the dissociated OH from H(2)O on BaO reacts with C on Ni near the BaO/Ni interface to produce CO and H species, which are then electrochemically oxidized at the triple-phase boundaries of the anode. This anode offers potential for ushering in a new generation of SOFCs for efficient, low-emission conversion of readily available fuels to electricity.
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DOI
10.1038/ncomms1359
ISSN
2041-1723
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