TY - JOUR
T1 - LaCoO 3 acting as an efficient and robust catalyst for photocatalytic water oxidation with persulfate
AU - Yamada, Yusuke
AU - Yano, Kentaro
AU - Hong, Dachao
AU - Fukuzumi, Shunichi
PY - 2012/4/28
Y1 - 2012/4/28
N2 - Cobalt-containing metal oxides [perovskites (LaCoO 3, NdCoO 3, YCoO 3, La 0.7Sr 0.3CoO 3), spinel (Co 3O 4) and wolframite (CoWO 4)] have been examined as catalysts for photocatalytic water oxidation with Na 2S 2O 8 and [Ru(bpy) 3] 2+ as an electron acceptor and a photosensitizer, respectively. Catalysts with the perovskite structure exhibited higher catalytic activity as compared with the catalysts with the spinel and wolframite structures. LaCoO 3, which stabilizes Co(iii) species in the perovskite structure, exhibited the highest catalytic activity in the photocatalytic water oxidation compared with CoWO 4, Co 3O 4 and La 0.7Sr 0.3CoO 3 which contain Co(ii) or Co(iv) species in the matrices. The high catalytic reactivity of LaCoO 3 possessing perovskite structure was maintained in NdCoO 3 and YCoO 3 which exclusively contain Co(iii) species. Thus, the catalytic activity of Co ions can be controlled by the additional metal ions, which leads to development of highly reactive and robust catalysts for the photocatalytic water oxidation.
AB - Cobalt-containing metal oxides [perovskites (LaCoO 3, NdCoO 3, YCoO 3, La 0.7Sr 0.3CoO 3), spinel (Co 3O 4) and wolframite (CoWO 4)] have been examined as catalysts for photocatalytic water oxidation with Na 2S 2O 8 and [Ru(bpy) 3] 2+ as an electron acceptor and a photosensitizer, respectively. Catalysts with the perovskite structure exhibited higher catalytic activity as compared with the catalysts with the spinel and wolframite structures. LaCoO 3, which stabilizes Co(iii) species in the perovskite structure, exhibited the highest catalytic activity in the photocatalytic water oxidation compared with CoWO 4, Co 3O 4 and La 0.7Sr 0.3CoO 3 which contain Co(ii) or Co(iv) species in the matrices. The high catalytic reactivity of LaCoO 3 possessing perovskite structure was maintained in NdCoO 3 and YCoO 3 which exclusively contain Co(iii) species. Thus, the catalytic activity of Co ions can be controlled by the additional metal ions, which leads to development of highly reactive and robust catalysts for the photocatalytic water oxidation.
UR - http://www.scopus.com/inward/record.url?scp=84859369650&partnerID=8YFLogxK
U2 - 10.1039/c2cp00022a
DO - 10.1039/c2cp00022a
M3 - Article
C2 - 22415556
AN - SCOPUS:84859369650
SN - 1463-9076
VL - 14
SP - 5753
EP - 5760
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
IS - 16
ER -