Structural pillar effect of Sn substitution in SrFe 1‒ x Sn x O 3‒ δ catalysts for oxidative decomposition of 1,2-dichloroethane
- 1Graduate School of Environmental Science, Hokkaido University, Nishi 5, Kita 10, ku Sapporo, Japan, 060-0810
- 2Faculty of Environmental Earth Science, Hokkaido University, Nishi 5, Kita 10, Sapporo, Japan, 060-0810
Abstract
Chlorination-induced structural degradation limits the durability of perovskite catalysts for the oxidative decomposition of chlorinated organic compounds. Here, a series of SrFe 1−x Sn x O 3−δ (x = 0, 0.25, 0.50, 0.75 and 1.0) was investigated for oxidation of 1,2-dichloroethane (1,2-DCE), with emphasis on the relationship between activity, structural stability and regenerability. Partial Sn substitution improved light-off performance relative to SrFeO 3−δ , whereas SrSnO 3 exhibited little catalytic activity. Although SrFe 0.50 Sn 0.50 O 3−δ gave the highest conversion during temperature-programmed oxidation, SrFe 0.25 Sn 0.75 O 3−δ (SFSO75) exhibited a more favorable balance between activity and structural stability. Independent exposure tests to CO 2 and HCl revealed that Sn substitution enhanced resistance to carbonate and chloride formation, particularly after oxidative pretreatment. Under a dry reaction feed at 450 °C, SFSO75 retained approximately 40% conversion of 1,2-DCE after 12 h, exceeding that of unsubstituted SrFeO 3−δ . Calcination of spent SFSO75 in air effectively restored its perovskite structure, and the regenerated catalyst maintained conversion at approximately 60% during a subsequent reaction of 12 h despite its lower surface area compared with the fresh catalyst. These results demonstrate the roles of Sn in enhancing activity and stabilizing and regenerating the perovskite structure as an effective approach to sustaining the performance of strontium ferrate for 1,2-DCE oxidation. Furthermore, with cofeeding 2.7% water vapor, fresh SFSO75 maintained conversion near 70% over 12 h and largely preserved the perovskite structure.
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BibTeX
@misc{sato2026structural,
title = {{Structural pillar effect of Sn substitution in SrFe 1‒ x Sn x O 3‒ δ catalysts for oxidative decomposition of 1,2-dichloroethane}},
author = {Miyu Sato and Kazutaka Hashimoto and Ziming Wang and Yuichi Kamiya and Ryoichi Otomo},
howpublished = {ChemRxiv},
year = {2026},
month = oct,
doi = {10.26434/chemrxiv.15010744/v1},
url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010744/v1},
note = {CC BY},
}
RIS
TY - UNPB
TI - Structural pillar effect of Sn substitution in SrFe 1‒ x Sn x O 3‒ δ catalysts for oxidative decomposition of 1,2-dichloroethane
AU - Miyu Sato
AU - Kazutaka Hashimoto
AU - Ziming Wang
AU - Yuichi Kamiya
AU - Ryoichi Otomo
PY - 2026
DA - 2026/10/20
PB - ChemRxiv
DO - 10.26434/chemrxiv.15010744/v1
UR - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010744/v1
AB - Chlorination-induced structural degradation limits the durability of perovskite catalysts for the oxidative decomposition of chlorinated organic compounds. Here, a series of SrFe 1−x Sn x O 3−δ (x = 0, 0.25, 0.50, 0.75 and 1.0) was investigated for oxidation of 1,2-dichloroethane (1,2-DCE), with emphasis on the relationship between activity, structural stability and regenerability. Partial Sn substitution improved light-off performance relative to SrFeO 3−δ , whereas SrSnO 3 exhibited little catalytic activity. Although SrFe 0.50 Sn 0.50 O 3−δ gave the highest conversion during temperature-programmed oxidation, SrFe 0.25 Sn 0.75 O 3−δ (SFSO75) exhibited a more favorable balance between activity and structural stability. Independent exposure tests to CO 2 and HCl revealed that Sn substitution enhanced resistance to carbonate and chloride formation, particularly after oxidative pretreatment. Under a dry reaction feed at 450 °C, SFSO75 retained approximately 40% conversion of 1,2-DCE after 12 h, exceeding that of unsubstituted SrFeO 3−δ . Calcination of spent SFSO75 in air effectively restored its perovskite structure, and the regenerated catalyst maintained conversion at approximately 60% during a subsequent reaction of 12 h despite its lower surface area compared with the fresh catalyst. These results demonstrate the roles of Sn in enhancing activity and stabilizing and regenerating the perovskite structure as an effective approach to sustaining the performance of strontium ferrate for 1,2-DCE oxidation. Furthermore, with cofeeding 2.7% water vapor, fresh SFSO75 maintained conversion near 70% over 12 h and largely preserved the perovskite structure.
ER -