The catalytic activity and surface characterization of Ln2B2O7 (Ln = Sm, Eu, Gd and Tb; B = Ti or Zr) with pyrochlore structure as novel CH4 combustion catalyst

Jung Min Sohn; Myoung Rae Kim; Seong Ihl Woo

doi:10.1016/S0920-5861(03)00249-9

The catalytic activity and surface characterization of Ln₂B₂O₇ (Ln = Sm, Eu, Gd and Tb; B = Ti or Zr) with pyrochlore structure as novel CH₄ combustion catalyst

Jung Min Sohn
, Myoung Rae Kim
, Seong Ihl Woo^*

^*Corresponding author for this work

Major of Mineral Resources and Energy Engineering

Korea Advanced Institute of Science and Technology

Research output: Contribution to journal › Journal article › peer-review

105 Scopus citations

Abstract

Ln₂B₂O₇ (Ln = Sm, Eu, Gd and Tb; B = Zr or Ti) with pyrochlore structure was prepared by sol-gel method for the high-temperature catalytic combustion. The crystal structure of Ln₂B₂O₇ was identified by XRD and their surface area was about 4 m²/g after calcinations at 1200 °C. Catalytic activity of methane combustion was observed for Ln₂Zr₂O₇ series and the best catalyst was Sm₂Zr₂O₇. Its relative reaction rate per unit surface area at 600 °C was 2 cm³/m²min, which was twice higher than that of Mn-substituted Sr hexaaluminate. From surface analysis by XPS, the low binding energy of each Ln element of Ln₂Zr₂O₇ compared to that of Ln₂Ti₂O₇, gave the catalytic activity of methane combustion.

Original language	English
Pages (from-to)	289-297
Number of pages	9
Journal	Catalysis Today
Volume	83
Issue number	1-4
DOIs	https://doi.org/10.1016/S0920-5861(03)00249-9
State	Published - 2003.08.15

Keywords

Catalytic combustion
LnZrO
Methane
Pyrochlore structure
Surface characterization
XPS

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10.1016/S0920-5861(03)00249-9

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title = "The catalytic activity and surface characterization of Ln2B2O7 (Ln = Sm, Eu, Gd and Tb; B = Ti or Zr) with pyrochlore structure as novel CH4 combustion catalyst",

abstract = "Ln2B2O7 (Ln = Sm, Eu, Gd and Tb; B = Zr or Ti) with pyrochlore structure was prepared by sol-gel method for the high-temperature catalytic combustion. The crystal structure of Ln2B2O7 was identified by XRD and their surface area was about 4 m2/g after calcinations at 1200 °C. Catalytic activity of methane combustion was observed for Ln2Zr2O7 series and the best catalyst was Sm2Zr2O7. Its relative reaction rate per unit surface area at 600 °C was 2 cm3/m2min, which was twice higher than that of Mn-substituted Sr hexaaluminate. From surface analysis by XPS, the low binding energy of each Ln element of Ln2Zr2O7 compared to that of Ln2Ti2O7, gave the catalytic activity of methane combustion.",

keywords = "Catalytic combustion, LnZrO, Methane, Pyrochlore structure, Surface characterization, XPS",

author = "Sohn, \{Jung Min\} and Kim, \{Myoung Rae\} and Woo, \{Seong Ihl\}",

year = "2003",

month = aug,

day = "15",

doi = "10.1016/S0920-5861(03)00249-9",

language = "English",

volume = "83",

pages = "289--297",

journal = "Catalysis Today",

issn = "0920-5861",

number = "1-4",

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TY - JOUR

T1 - The catalytic activity and surface characterization of Ln2B2O7 (Ln = Sm, Eu, Gd and Tb; B = Ti or Zr) with pyrochlore structure as novel CH4 combustion catalyst

AU - Sohn, Jung Min

AU - Kim, Myoung Rae

AU - Woo, Seong Ihl

PY - 2003/8/15

Y1 - 2003/8/15

N2 - Ln2B2O7 (Ln = Sm, Eu, Gd and Tb; B = Zr or Ti) with pyrochlore structure was prepared by sol-gel method for the high-temperature catalytic combustion. The crystal structure of Ln2B2O7 was identified by XRD and their surface area was about 4 m2/g after calcinations at 1200 °C. Catalytic activity of methane combustion was observed for Ln2Zr2O7 series and the best catalyst was Sm2Zr2O7. Its relative reaction rate per unit surface area at 600 °C was 2 cm3/m2min, which was twice higher than that of Mn-substituted Sr hexaaluminate. From surface analysis by XPS, the low binding energy of each Ln element of Ln2Zr2O7 compared to that of Ln2Ti2O7, gave the catalytic activity of methane combustion.

AB - Ln2B2O7 (Ln = Sm, Eu, Gd and Tb; B = Zr or Ti) with pyrochlore structure was prepared by sol-gel method for the high-temperature catalytic combustion. The crystal structure of Ln2B2O7 was identified by XRD and their surface area was about 4 m2/g after calcinations at 1200 °C. Catalytic activity of methane combustion was observed for Ln2Zr2O7 series and the best catalyst was Sm2Zr2O7. Its relative reaction rate per unit surface area at 600 °C was 2 cm3/m2min, which was twice higher than that of Mn-substituted Sr hexaaluminate. From surface analysis by XPS, the low binding energy of each Ln element of Ln2Zr2O7 compared to that of Ln2Ti2O7, gave the catalytic activity of methane combustion.

KW - Catalytic combustion

KW - LnZrO

KW - Methane

KW - Pyrochlore structure

KW - Surface characterization

KW - XPS

UR - https://www.scopus.com/pages/publications/0041422290

U2 - 10.1016/S0920-5861(03)00249-9

DO - 10.1016/S0920-5861(03)00249-9

M3 - Journal article

AN - SCOPUS:0041422290

SN - 0920-5861

VL - 83

SP - 289

EP - 297

JO - Catalysis Today

JF - Catalysis Today

IS - 1-4

ER -

The catalytic activity and surface characterization of Ln₂B₂O₇ (Ln = Sm, Eu, Gd and Tb; B = Ti or Zr) with pyrochlore structure as novel CH₄ combustion catalyst

Abstract

Keywords

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