Abstract
Well-defined Ln2Sn2O7 powders (Ln = La, Sm and Gd) with a phase-pure pyrochlore structure were synthesized by hydrothermal reaction. The catalytic activities of Ln2Sn 2O7 powders for methane combustion were measured. Methane oxidation started at 500°C and increased with oxidation temperature. Catalytic methane combustion is strongly influenced by the presence of oxygen vacancies that form by breaking Sn-O lattice bonds as the temperature increases. Addition of manganese to the rare earth pyrochlores improved methane oxidation activity. Manganese-doped samarium stannate pyrochlore (Sm2Sn 1.8Mn0.2O7 shows highest the catalytic activity. Light-off and complete oxidation temperatures were measured at about 400 and 650°C, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 219-223 |
| Number of pages | 5 |
| Journal | Catalysis Letters |
| Volume | 87 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - 2003 Apr 1 |
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All Science Journal Classification (ASJC) codes
- Catalysis
- Physical and Theoretical Chemistry
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Catalytic combustion of methane over rare earth stannate pyrochlore. / Park, Sarohan; Hwang, Hae Jin; Moon, Joo Ho.
In: Catalysis Letters, Vol. 87, No. 3-4, 01.04.2003, p. 219-223.Research output: Contribution to journal › Article
TY - JOUR
T1 - Catalytic combustion of methane over rare earth stannate pyrochlore
AU - Park, Sarohan
AU - Hwang, Hae Jin
AU - Moon, Joo Ho
PY - 2003/4/1
Y1 - 2003/4/1
N2 - Well-defined Ln2Sn2O7 powders (Ln = La, Sm and Gd) with a phase-pure pyrochlore structure were synthesized by hydrothermal reaction. The catalytic activities of Ln2Sn 2O7 powders for methane combustion were measured. Methane oxidation started at 500°C and increased with oxidation temperature. Catalytic methane combustion is strongly influenced by the presence of oxygen vacancies that form by breaking Sn-O lattice bonds as the temperature increases. Addition of manganese to the rare earth pyrochlores improved methane oxidation activity. Manganese-doped samarium stannate pyrochlore (Sm2Sn 1.8Mn0.2O7 shows highest the catalytic activity. Light-off and complete oxidation temperatures were measured at about 400 and 650°C, respectively.
AB - Well-defined Ln2Sn2O7 powders (Ln = La, Sm and Gd) with a phase-pure pyrochlore structure were synthesized by hydrothermal reaction. The catalytic activities of Ln2Sn 2O7 powders for methane combustion were measured. Methane oxidation started at 500°C and increased with oxidation temperature. Catalytic methane combustion is strongly influenced by the presence of oxygen vacancies that form by breaking Sn-O lattice bonds as the temperature increases. Addition of manganese to the rare earth pyrochlores improved methane oxidation activity. Manganese-doped samarium stannate pyrochlore (Sm2Sn 1.8Mn0.2O7 shows highest the catalytic activity. Light-off and complete oxidation temperatures were measured at about 400 and 650°C, respectively.
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U2 - 10.1023/A:1023626226464
DO - 10.1023/A:1023626226464
M3 - Article
VL - 87
SP - 219
EP - 223
JO - Catalysis Letters
JF - Catalysis Letters
SN - 1011-372X
IS - 3-4
ER -