TY - JOUR

T1 - Effect of complex oxide promoters and Pd on activity and stability of Ni/YSZ (ScSZ) cermets as anode materials for IT SOFC

AU - Sadykov, VA

AU - Mezentseva, NV

AU - Bunina, RV

AU - Alikina, GM

AU - Lukashevich, AI

AU - Kharlamov, TS

AU - Rogov, VA

AU - Zaikovskii, VI

AU - Ishchenko, AV

AU - Krieger, TA

AU - Bobrenok, OF

AU - Smirnova, A

AU - Irvine, John Thomas Sirr

AU - Vasylyev, OD

PY - 2008/2/29

Y1 - 2008/2/29

N2 - Effect of fluorite-like or perovskite-like complex oxide promoters, Pd and Cu on the performance of Ni/8YSZ and Ni/ScCeSZ anode materials in CH4 steam reforming (SR) or selective oxidation (SO) by O-2 into syngas was studied. The spatial distribution of dopants in composites before and after contact with the reaction feed, features of components mutual interaction and forms of deposited coke were controlled by TEM combined with EDX analysis. The lattice oxygen mobility and reactivity were estimated by CH4 and H-2 temperature-programmed reduction (TPR), and the amount of deposited carbon after operation in the feed with stoichiometric H2O/CH4 ratio was estimated by the temperature-programmed oxidation. Promoters decrease the amount of deposited coke, while doping by Pd or Cu ensures also a good and stable performance at moderate (similar to 550 degrees C) temperatures required for the intermediate-temperature solid oxide fuel cells (IT SOFC) operation. (c) 2007 Elsevier B.V. All rights reserved.

AB - Effect of fluorite-like or perovskite-like complex oxide promoters, Pd and Cu on the performance of Ni/8YSZ and Ni/ScCeSZ anode materials in CH4 steam reforming (SR) or selective oxidation (SO) by O-2 into syngas was studied. The spatial distribution of dopants in composites before and after contact with the reaction feed, features of components mutual interaction and forms of deposited coke were controlled by TEM combined with EDX analysis. The lattice oxygen mobility and reactivity were estimated by CH4 and H-2 temperature-programmed reduction (TPR), and the amount of deposited carbon after operation in the feed with stoichiometric H2O/CH4 ratio was estimated by the temperature-programmed oxidation. Promoters decrease the amount of deposited coke, while doping by Pd or Cu ensures also a good and stable performance at moderate (similar to 550 degrees C) temperatures required for the intermediate-temperature solid oxide fuel cells (IT SOFC) operation. (c) 2007 Elsevier B.V. All rights reserved.

KW - SOFC composite anodes

KW - methane steam reforming

KW - promoters

KW - microstructure

KW - TEM

KW - EDX

KW - H-2 and CH4 TPR

KW - TEMPERATURE FUEL-CELLS

KW - SELECTIVE OXIDATION

KW - CHEMICAL-PROPERTIES

KW - METHANE OXIDATION

KW - SOLID-SOLUTIONS

KW - CERIUM DIOXIDE

KW - CATALYSTS

KW - PERFORMANCE

KW - ZIRCONIA

KW - GD

UR - http://www.scopus.com/inward/record.url?scp=38349164811&partnerID=8YFLogxK

U2 - 10.1016/j.cattod.2007.10.064

DO - 10.1016/j.cattod.2007.10.064

M3 - Article

VL - 131

SP - 226

EP - 237

JO - Catalysis Today

JF - Catalysis Today

SN - 0920-5861

IS - 1-4

ER -