TY - JOUR
T1 - Synergistic effect of Pt or Pd and perovskite oxide for water gas shift reaction
AU - Sekine, Yasushi
AU - Takamatsu, Haruka
AU - Aramaki, Sho
AU - Ichishima, Kazuki
AU - Takada, Mitsuko
AU - Matsukata, Masahiko
AU - Kikuchi, Eiichi
PY - 2009/1/15
Y1 - 2009/1/15
N2 - The water gas shift (WGS) reaction over Pt and Pd catalysts supported on various perovskite oxides has been investigated at 573 K without catalyst pretreatment. The Pt and Pd catalysts on LaCoO3 support showed high catalytic activity. Interaction between Pt or Pd and the support is considered to promote the WGS reaction: Pt/LaCoO3 had high initial activity but deactivated immediately; Pd/LaCoO3 was less active than Pt/LaCoO3, but had superior stability. Catalysts were characterized using XRD, STEM, XPS, and H2-temperature programmed reduction (TPR). Results of this study showed that reduction of the support decreased the CO conversion on Pt/LaCoO3. On the other hand, Pd/LaCoO3 showed stable activity for the WGS reaction. Therefore, Pd was added to Pt/LaCoO3 for stabilizing the catalyst activity, and 0.5 wt.% Pd/1 wt.% Pt/LaCoO3 catalyst showed higher activity and stability.
AB - The water gas shift (WGS) reaction over Pt and Pd catalysts supported on various perovskite oxides has been investigated at 573 K without catalyst pretreatment. The Pt and Pd catalysts on LaCoO3 support showed high catalytic activity. Interaction between Pt or Pd and the support is considered to promote the WGS reaction: Pt/LaCoO3 had high initial activity but deactivated immediately; Pd/LaCoO3 was less active than Pt/LaCoO3, but had superior stability. Catalysts were characterized using XRD, STEM, XPS, and H2-temperature programmed reduction (TPR). Results of this study showed that reduction of the support decreased the CO conversion on Pt/LaCoO3. On the other hand, Pd/LaCoO3 showed stable activity for the WGS reaction. Therefore, Pd was added to Pt/LaCoO3 for stabilizing the catalyst activity, and 0.5 wt.% Pd/1 wt.% Pt/LaCoO3 catalyst showed higher activity and stability.
KW - Lattice oxygen
KW - Pd catalyst
KW - Perovskite oxide
KW - Pt catalyst
KW - Synergistic effect
KW - Water gas shift
UR - http://www.scopus.com/inward/record.url?scp=57449088159&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=57449088159&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2008.10.008
DO - 10.1016/j.apcata.2008.10.008
M3 - Article
AN - SCOPUS:57449088159
SN - 0926-860X
VL - 352
SP - 214
EP - 222
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
IS - 1-2
ER -