title: Enhanced methane steam reforming activity and electrochemical performance of Ni0.9Fe0.1-supported solid oxide fuel cells with infiltrated Ni-TiO2particles.
abstract: Ni0.9Fe0.1alloy-supported solid oxide fuel cells with NiTiO3(NTO) infiltrated into the cell support from 0 to 4 wt.% are prepared and investigated for CH4steam reforming activity and electrochemical performance. The infiltrated NiTiO3is reduced to TiO2-supported Ni particles in H2at 650 °C. The reforming activity of the Ni0.9Fe0.1-support is increased by the presence of the TiO2-supported Ni particles; 3 wt.% is the optimal value of the added NTO, corresponding to the highest reforming activity, resistance to carbon deposition and electrochemical performance of the cell. Fueled wet CH4at 100 mL min-1, the cell with 3 wt.% of NTO demonstrates a peak power density of 1.20 W cm-2and a high limiting current density of 2.83 A cm-2at 650 °C. It performs steadily for 96 h at 0.4 A cm-2without the presence of deposited carbon in the Ni0.9Fe0.1-support and functional anode. Five polarization processes are identified by deconvoluting and data-fitting the electrochemical impedance spectra of the cells under the testing conditions; and the addition of TiO2-supported Ni particles into the Ni0.9Fe0.1-support reduces the polarization resistance of the processes ascribed to CH4steam reforming and gas diffusion in the Ni0.9Fe0.1-support and functional anode.
authors: School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China.
authors: Kai
authors: K
authors: Li
authors: Center for Fuel Cell Innovation, State Key Laboratory for Materials Processing and Die &Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
authors: Lichao
authors: L
authors: Jia
authors: Center for Fuel Cell Innovation, State Key Laboratory for Materials Processing and Die &Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
authors: Xin
authors: X
authors: Wang
authors: Center for Fuel Cell Innovation, State Key Laboratory for Materials Processing and Die &Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
authors: Jian
authors: J
authors: Pu
authors: Center for Fuel Cell Innovation, State Key Laboratory for Materials Processing and Die &Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
authors: Bo
authors: B
authors: Chi
authors: Center for Fuel Cell Innovation, State Key Laboratory for Materials Processing and Die &Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
authors: Jian
authors: J
authors: Li